Open Access

Measurement of the Top-Quark Production Cross Section and Charge Asymmetry at LHCb

R. Aaij ³⁸, A. S. W. Abdelmotteleb ⁵⁸, C. Abellan Beteta ⁵², F. Abudinén⁶⁰, T. Ackernley ⁶², A. A. Adefisoye ⁷⁰, B. Adeva ⁴⁸, M. Adinolfi ⁵⁶, P. Adlarson ⁸⁶ et al. (LHCb Collaboration)

P. Adlarson ⁸⁶, C. Agapopoulou ¹⁴, C. A. Aidala ⁸⁸, Z. Ajaltouni¹¹, S. Akar ¹¹, K. Akiba ³⁸, M. Akthar⁴⁰, P. Albicocco ²⁸, J. Albrecht ^19,b, R. Aleksiejunas ⁸², F. Alessio ⁵⁰, P. Alvarez Cartelle ^57,48, R. Amalric ¹⁶, S. Amato ³, J. L. Amey ⁵⁶, Y. Amhis ¹⁴, L. An ⁶, L. Anderlini ²⁷, M. Andersson ⁵², P. Andreola ⁵², M. Andreotti ²⁶, S. Andres Estrada ⁴⁵, A. Anelli ^31,c, D. Ao ⁷, C. Arata ¹², F. Archilli ³⁷, Z. Areg ⁷⁰, M. Argenton ²⁶, S. Arguedas Cuendis ^9,50, L. Arnone ^31,c, A. Artamonov ⁴⁴, M. Artuso ⁷⁰, E. Aslanides ¹³, R. Ataíde Da Silva ⁵¹, M. Atzeni ⁶⁶, B. Audurier ¹², J. A. Authier ¹⁵, D. Bacher ⁶⁵, I. Bachiller Perea ⁵¹, S. Bachmann ²², M. Bachmayer ⁵¹, J. J. Back ⁵⁸, P. Baladron Rodriguez ⁴⁸, V. Balagura ¹⁵, A. Balboni ²⁶, W. Baldini ²⁶, Z. Baldwin ⁸⁰, L. Balzani ¹⁹, H. Bao ⁷, J. Baptista de Souza Leite ², C. Barbero Pretel ^48,12, M. Barbetti ²⁷, I. R. Barbosa ⁷¹, R. J. Barlow ^64,a, M. Barnyakov ²⁵, S. Barsuk ¹⁴, W. Barter ⁶⁰, J. Bartz ⁷⁰, S. Bashir ⁴⁰, B. Batsukh ⁵, P. B. Battista ¹⁴, A. Bavarchee ⁸¹, A. Bay ⁵¹, A. Beck ⁶⁶, M. Becker ¹⁹, F. Bedeschi ³⁵, I. B. Bediaga ², N. A. Behling ¹⁹, S. Belin ⁴⁸, A. Bellavista ²⁵, K. Belous ⁴⁴, I. Belov ²⁹, I. Belyaev ³⁶, G. Benane ¹³, G. Bencivenni ²⁸, E. Ben-Haim ¹⁶, A. Berezhnoy ⁴⁴, R. Bernet ⁵², S. Bernet Andres ⁴⁷, A. Bertolin ³³, F. Betti ⁶⁰, J. Bex ⁵⁷, O. Bezshyyko ⁸⁷, S. Bhattacharya ⁸¹, M. S. Bieker ¹⁸, N. V. Biesuz ²⁶, A. Biolchini ³⁸, M. Birch ⁶³, F. C. R. Bishop ¹⁰, A. Bitadze ⁶⁴, A. Bizzeti ^27,d, T. Blake ^58,e, F. Blanc ⁵¹, J. E. Blank ¹⁹, S. Blusk ⁷⁰, V. Bocharnikov ⁴⁴, J. A. Boelhauve ¹⁹, O. Boente Garcia ⁵⁰, T. Boettcher ⁸⁹, A. Bohare ⁶⁰, A. Boldyrev ⁴⁴, C. Bolognani ⁸⁴, R. Bolzonella ^26,f, R. B. Bonacci ¹, N. Bondar ^44,50, A. Bordelius ⁵⁰, F. Borgato ^33,50, S. Borghi ⁶⁴, M. Borsato ^31,c, J. T. Borsuk ⁸⁵, E. Bottalico ⁶², S. A. Bouchiba ⁵¹, M. Bovill ⁶⁵, T. J. V. Bowcock ⁶², A. Boyer ⁵⁰, C. Bozzi ²⁶, J. D. Brandenburg ⁹⁰, A. Brea Rodriguez ⁵¹, N. Breer ¹⁹, J. Brodzicka ⁴¹, J. Brown ⁶², D. Brundu ³², E. Buchanan ⁶⁰, M. Burgos Marcos ⁸⁴, C. Burr ⁵⁰, C. Buti ²⁷, J. S. Butter ⁵⁷, J. Buytaert ⁵⁰, W. Byczynski ⁵⁰, S. Cadeddu ³², H. Cai ⁷⁶, Y. Cai ⁵, A. Caillet ¹⁶, R. Calabrese ^26,f, L. Calefice ⁴⁶, M. Calvi ^31,c, M. Calvo Gomez ⁴⁷, P. Camargo Magalhaes ^2,g, J. I. Cambon Bouzas ⁴⁸, P. Campana ²⁸, A. C. Campos ³, A. F. Campoverde Quezada ⁷, Y. Cao⁶, S. Capelli ³¹, M. Caporale ²⁵, L. Capriotti ²⁶, R. Caravaca-Mora ⁹, A. Carbone ^25,h, L. Carcedo Salgado ⁴⁸, R. Cardinale ^29,i, A. Cardini ³², P. Carniti ³¹, L. Carus ²², A. Casais Vidal ⁶⁶, R. Caspary ²², G. Casse ⁶², M. Cattaneo ⁵⁰, G. Cavallero ²⁶, V. Cavallini ^26,f, S. Celani ⁵⁰, I. Celestino ^35,j, S. Cesare ^50,k, A. J. Chadwick ⁶², I. Chahrour ⁸⁸, H. Chang ^4,l, M. Charles ¹⁶, Ph. Charpentier ⁵⁰, E. Chatzianagnostou ³⁸, R. Cheaib ⁸¹, M. Chefdeville ¹⁰, C. Chen ⁵⁷, J. Chen ⁵¹, S. Chen ⁵, Z. Chen ⁷, A. Chen Hu ⁶³, M. Cherif ¹², A. Chernov ⁴¹, S. Chernyshenko ⁵⁴, X. Chiotopoulos ⁸⁴, V. Chobanova ⁴⁵, M. Chrzaszcz ⁴¹, A. Chubykin ⁴⁴, V. Chulikov ^28,50,36, P. Ciambrone ²⁸, X. Cid Vidal ⁴⁸, G. Ciezarek ⁵⁰, P. Cifra ⁵⁰, P. E. L. Clarke ⁶⁰, M. Clemencic ⁵⁰, H. V. Cliff ⁵⁷, J. Closier ⁵⁰, C. Cocha Toapaxi ²², V. Coco ⁵⁰, J. Cogan ¹³, E. Cogneras ¹¹, L. Cojocariu ⁴³, S. Collaviti ⁵¹, P. Collins ⁵⁰, T. Colombo ⁵⁰, M. Colonna ¹⁹, A. Comerma-Montells ⁴⁶, L. Congedo ²⁴, J. Connaughton ⁵⁸, A. Contu ³², N. Cooke ⁶¹, G. Cordova ^35,j, C. Coronel ⁶⁷, I. Corredoira ¹², A. Correia ¹⁶, G. Corti ⁵⁰, J. Cottee Meldrum ⁵⁶, B. Couturier ⁵⁰, D. C. Craik ⁵², M. Cruz Torres ^2,m, M. Cubero Campos ⁹, E. Curras Rivera ⁵¹, R. Currie ⁶⁰, C. L. Da Silva ⁶⁹, S. Dadabaev ⁴⁴, X. Dai ⁴, E. Dall’Occo ⁵⁰, J. Dalseno ⁴⁵, C. D’Ambrosio ⁶³, J. Daniel ¹¹, G. Darze ³, A. Davidson ⁵⁸, J. E. Davies ⁶⁴, O. De Aguiar Francisco ⁶⁴, C. De Angelis ^32,n, F. De Benedetti ⁵⁰, J. de Boer ³⁸, K. De Bruyn ⁸³, S. De Capua ⁶⁴, M. De Cian ^64,50, U. De Freitas Carneiro Da Graca ^2,o, E. De Lucia ²⁸, J. M. De Miranda ², L. De Paula ³, M. De Serio ^24,p, P. De Simone ²⁸, F. De Vellis ¹⁹, J. A. de Vries ⁸⁴, F. Debernardis ²⁴, D. Decamp ¹⁰, S. Dekkers ¹, L. Del Buono ¹⁶, B. Delaney ⁶⁶, J. Deng ⁸, V. Denysenko ⁵², O. Deschamps ¹¹, F. Dettori ^32,n, B. Dey ⁸¹, P. Di Nezza ²⁸, I. Diachkov ⁴⁴, S. Didenko ⁴⁴, S. Ding ⁷⁰, Y. Ding ⁵¹, L. Dittmann ²², V. Dobishuk ⁵⁴, A. D. Docheva ⁶¹, A. Doheny ⁵⁸, C. Dong ^4,l, F. Dordei ³², A. C. dos Reis ², A. D. Dowling ⁷⁰, L. Dreyfus ¹³, W. Duan ⁷⁴, P. Duda ⁸⁵, L. Dufour ⁵¹, V. Duk ³⁴, P. Durante ⁵⁰, M. M. Duras ⁸⁵, J. M. Durham ⁶⁹, O. D. Durmus ⁸¹, A. Dziurda ⁴¹, A. Dzyuba ⁴⁴, S. Easo ⁵⁹, E. Eckstein ¹⁸, U. Egede ¹, A. Egorychev ⁴⁴, V. Egorychev ⁴⁴, S. Eisenhardt ⁶⁰, E. Ejopu ⁶², L. Eklund ⁸⁶, M. Elashri ⁶⁷, D. Elizondo Blanco ⁹, J. Ellbracht ¹⁹, S. Ely ⁶³, A. Ene ⁴³, J. Eschle ⁷⁰, T. Evans ³⁸, F. Fabiano ¹⁴, S. Faghih ⁶⁷, L. N. Falcao ^31,c, B. Fang ⁷, R. Fantechi ³⁵, L. Fantini ^34,q, M. Faria ⁵¹, K. Farmer ⁶⁰, F. Fassin ^83,38, D. Fazzini ^31,c, L. Felkowski ⁸⁵, C. Feng⁶, M. Feng ^5,7, A. Fernandez Casani ⁴⁹, M. Fernandez Gomez ⁴⁸, A. D. Fernez ⁶⁸, F. Ferrari ^25,h, F. Ferreira Rodrigues ³, M. Ferrillo ⁵², M. Ferro-Luzzi ⁵⁰, S. Filippov ⁴⁴, R. A. Fini ²⁴, M. Fiorini ^26,f, M. Firlej ⁴⁰, K. L. Fischer ⁶⁵, D. S. Fitzgerald ⁸⁸, C. Fitzpatrick ⁶⁴, T. Fiutowski ⁴⁰, F. Fleuret ¹⁵, A. Fomin ⁵³, M. Fontana ^25,50, L. A. Foreman ⁶⁴, R. Forty ⁵⁰, D. Foulds-Holt ⁶⁰, V. Franco Lima ³, M. Franco Sevilla ⁶⁸, M. Frank ⁵⁰, E. Franzoso ^26,f, G. Frau ⁶⁴, C. Frei ⁵⁰, D. A. Friday ^64,50, J. Fu ⁷, Q. Führing^19,57,b, T. Fulghesu ¹³, G. Galati ^24,p, M. D. Galati ³⁸, A. Gallas Torreira ⁴⁸, D. Galli ^25,h, S. Gambetta ⁶⁰, M. Gandelman ³, P. Gandini ³⁰, B. Ganie ⁶⁴, H. Gao ⁷, R. Gao ⁶⁵, T. Q. Gao ⁵⁷, Y. Gao ⁸, Y. Gao ⁶, Y. Gao ⁸, L. M. Garcia Martin ⁵¹, P. Garcia Moreno ⁴⁶, J. García Pardiñas⁶⁶, P. Gardner ⁶⁸, L. Garrido ⁴⁶, C. Gaspar ⁵⁰, A. Gavrikov ³³, L. L. Gerken ¹⁹, E. Gersabeck ²⁰, M. Gersabeck ²⁰, T. Gershon ⁵⁸, S. Ghizzo ^29,i, Z. Ghorbanimoghaddam ⁵⁶, F. I. Giasemis ^16,r, V. Gibson ⁵⁷, H. K. Giemza ⁴², A. L. Gilman ⁶⁷, M. Giovannetti ²⁸, A. Gioventù⁴⁶, L. Girardey ^64,59, M. A. Giza ⁴¹, F. C. Glaser ^22,14, V. V. Gligorov ¹⁶, C. Göbel⁷¹, L. Golinka-Bezshyyko ⁸⁷, E. Golobardes ⁴⁷, D. Golubkov ⁴⁴, A. Golutvin ^63,50, S. Gomez Fernandez ⁴⁶, W. Gomulka ⁴⁰, F. Goncalves Abrantes ⁶⁵, I. Gonçales Vaz ⁵⁰, M. Goncerz ⁴¹, G. Gong ^4,l, J. A. Gooding ¹⁹, I. V. Gorelov ⁴⁴, C. Gotti ³¹, E. Govorkova ⁶⁶, J. P. Grabowski ³⁰, L. A. Granado Cardoso ⁵⁰, E. Graugés⁴⁶, E. Graverini ^35,51,s, L. Grazette ⁵⁸, G. Graziani ²⁷, A. T. Grecu ⁴³, N. A. Grieser ⁶⁷, L. Grillo ⁶¹, S. Gromov ⁴⁴, C. Gu ¹⁵, M. Guarise ²⁶, L. Guerry ¹¹, A.-K. Guseinov ⁵¹, E. Gushchin ⁴⁴, Y. Guz ^6,50, T. Gys ⁵⁰, K. Habermann ¹⁸, T. Hadavizadeh ¹, C. Hadjivasiliou ⁶⁸, G. Haefeli ⁵¹, C. Haen ⁵⁰, S. Haken ⁵⁷, G. Hallett ⁵⁸, P. M. Hamilton ⁶⁸, J. Hammerich ⁶², Q. Han ³³, X. Han ^22,50, S. Hansmann-Menzemer ²², L. Hao ⁷, N. Harnew ⁶⁵, T. J. Harris ¹, M. Hartmann ¹⁴, S. Hashmi ⁴⁰, J. He ^7,t, N. Heatley ¹⁴, A. Hedes ⁶⁴, F. Hemmer ⁵⁰, C. Henderson ⁶⁷, R. Henderson ¹⁴, R. D. L. Henderson ¹, A. M. Hennequin ⁵⁰, K. Hennessy ⁶², L. Henry ⁵¹, J. Herd ⁶³, P. Herrero Gascon ²², J. Heuel ¹⁷, A. Heyn ¹³, A. Hicheur ³, G. Hijano Mendizabal ⁵², J. Horswill ⁶⁴, R. Hou ⁸, Y. Hou ¹¹, D. C. Houston ⁶¹, N. Howarth ⁶², W. Hu ⁷, X. Hu ⁴, W. Hulsbergen ³⁸, R. J. Hunter ⁵⁸, M. Hushchyn ⁴⁴, D. Hutchcroft ⁶², M. Idzik ⁴⁰, D. Ilin ⁴⁴, P. Ilten ⁶⁷, A. Iniukhin ⁴⁴, A. Iohner ¹⁰, A. Ishteev ⁴⁴, K. Ivshin ⁴⁴, H. Jage ¹⁷, S. J. Jaimes Elles ^78,49,50, S. Jakobsen ⁵⁰, T. Jakoubek ⁷⁹, E. Jans ³⁸, B. K. Jashal ⁴⁹, A. Jawahery ⁶⁸, C. Jayaweera ⁵⁵, A. Jelavic ¹, V. Jevtic ¹⁹, Z. Jia ¹⁶, E. Jiang ⁶⁸, X. Jiang ^5,7, Y. Jiang ⁷, Y. J. Jiang ⁶, E. Jimenez Moya ⁹, N. Jindal ⁹⁰, M. John ⁶⁵, A. John Rubesh Rajan ²³, D. Johnson ⁵⁵, C. R. Jones ⁵⁷, S. Joshi ⁴², B. Jost ⁵⁰, J. Juan Castella ⁵⁷, N. Jurik ⁵⁰, I. Juszczak ⁴¹, K. Kalecinska⁴⁰, D. Kaminaris ⁵¹, S. Kandybei ⁵³, M. Kane ⁶⁰, Y. Kang ^4,l, C. Kar ¹¹, M. Karacson ⁵⁰, A. Kauniskangas ⁵¹, J. W. Kautz ⁶⁷, M. K. Kazanecki ⁴¹, F. Keizer ⁵⁰, M. Kenzie ⁵⁷, T. Ketel ³⁸, B. Khanji ⁷⁰, A. Kharisova ⁴⁴, S. Kholodenko ^63,50, G. Khreich ¹⁴, F. Kiraz¹⁴, T. Kirn ¹⁷, V. S. Kirsebom ^31,c, S. Klaver ³⁹, N. Kleijne ^35,j, A. Kleimenova ⁵¹, D. K. Klekots ⁸⁷, K. Klimaszewski ⁴², M. R. Kmiec ⁴², T. Knospe ¹⁹, R. Kolb ²², S. Koliiev ⁵⁴, L. Kolk ¹⁹, A. Konoplyannikov ⁶, P. Kopciewicz ⁵⁰, P. Koppenburg ³⁸, A. Korchin ⁵³, I. Kostiuk ³⁸, O. Kot ⁵⁴, S. Kotriakhova ³², E. Kowalczyk ⁶⁸, A. Kozachuk ⁴⁴, P. Kravchenko ⁴⁴, L. Kravchuk ⁴⁴, O. Kravcov ⁸², M. Kreps ⁵⁸, P. Krokovny ⁴⁴, W. Krupa ⁷⁰, W. Krzemien ⁴², O. Kshyvanskyi ⁵⁴, S. Kubis ⁸⁵, M. Kucharczyk ⁴¹, V. Kudryavtsev ⁴⁴, E. Kulikova ⁴⁴, A. Kupsc ⁸⁶, V. Kushnir ⁵³, B. Kutsenko ¹³, J. Kvapil ⁶⁹, I. Kyryllin ⁵³, D. Lacarrere ⁵⁰, P. Laguarta Gonzalez ⁴⁶, A. Lai ³², A. Lampis ³², D. Lancierini ⁶³, C. Landesa Gomez ⁴⁸, J. J. Lane ¹, G. Lanfranchi ²⁸, C. Langenbruch ²², J. Langer ¹⁹, T. Latham ⁵⁸, F. Lazzari ^35,s, C. Lazzeroni ⁵⁵, R. Le Gac ¹³, H. Lee ⁶², R. Lefèvre¹¹, A. Leflat ⁴⁴, S. Legotin ⁴⁴, M. Lehuraux ⁵⁸, E. Lemos Cid ⁵⁰, O. Leroy ¹³, T. Lesiak ⁴¹, E. D. Lesser ⁵⁰, B. Leverington ²², A. Li ^4,l, C. Li ⁴, C. Li ¹³, H. Li ⁷⁴, J. Li ⁸, K. Li ⁷⁷, L. Li ⁶⁴, P. Li ⁷, P.-R. Li ⁷⁵, Q. Li ^5,7, T. Li ⁷³, T. Li ⁷⁴, Y. Li ⁸, Y. Li ⁵, Y. Li ⁴, Z. Lian ^4,l, Q. Liang⁸, X. Liang ⁷⁰, Z. Liang ³², S. Libralon ⁴⁹, A. Lightbody ¹², C. Lin ⁷, T. Lin ⁵⁹, R. Lindner ⁵⁰, H. Linton ⁶³, R. Litvinov ³², D. Liu ⁸, F. L. Liu ¹, G. Liu ⁷⁴, K. Liu ⁷⁵, S. Liu ⁵, W. Liu ⁸, Y. Liu ⁶⁰, Y. Liu ⁷⁵, Y. L. Liu ⁶³, G. Loachamin Ordonez ⁷¹, I. Lobo ¹, A. Lobo Salvia ¹⁰, A. Loi ³², T. Long ⁵⁷, F. C. L. Lopes ^2,g, J. H. Lopes ³, A. Lopez Huertas ⁴⁶, C. Lopez Iribarnegaray ⁴⁸, S. López Soliño⁴⁸, Q. Lu ¹⁵, C. Lucarelli ⁵⁰, D. Lucchesi ^33,u, M. Lucio Martinez ⁴⁹, Y. Luo ⁶, A. Lupato ^33,v, E. Luppi ^26,f, K. Lynch ²³, S. Lyu⁶, X.-R. Lyu ⁷, G. M. Ma ^4,l, H. Ma ⁷³, S. Maccolini ¹⁹, F. Machefert ¹⁴, F. Maciuc ⁴³, B. Mack ⁷⁰, I. Mackay ⁶⁵, L. M. Mackey ⁷⁰, L. R. Madhan Mohan ⁵⁷, M. J. Madurai ⁵⁵, D. Magdalinski ³⁸, D. Maisuzenko ⁴⁴, J. J. Malczewski ⁴¹, S. Malde ⁶⁵, L. Malentacca ⁵⁰, A. Malinin ⁴⁴, T. Maltsev ⁴⁴, G. Manca ^32,n, G. Mancinelli ¹³, C. Mancuso ¹⁴, R. Manera Escalero ⁴⁶, F. M. Manganella ³⁷, D. Manuzzi ²⁵, D. Marangotto ^30,k, J. F. Marchand ¹⁰, R. Marchevski ⁵¹, U. Marconi ²⁵, E. Mariani ¹⁶, S. Mariani ⁵⁰, C. Marin Benito ⁴⁶, J. Marks ²², A. M. Marshall ⁵⁶, L. Martel ⁶⁵, G. Martelli ³⁴, G. Martellotti ³⁶, L. Martinazzoli ⁵⁰, M. Martinelli ^31,c, D. Martinez Gomez ⁸³, D. Martinez Santos ⁴⁵, F. Martinez Vidal ⁴⁹, A. Martorell i Granollers ⁴⁷, A. Massafferri ², R. Matev ⁵⁰, A. Mathad ⁵⁰, V. Matiunin ⁴⁴, C. Matteuzzi ⁷⁰, K. R. Mattioli ¹⁵, A. Mauri ⁶³, E. Maurice ¹⁵, J. Mauricio ⁴⁶, P. Mayencourt ⁵¹, J. Mazorra de Cos ⁴⁹, M. Mazurek ⁴², D. Mazzanti Tarancon ⁴⁶, M. McCann ⁶³, N. T. McHugh ⁶¹, A. McNab ⁶⁴, R. McNulty ²³, B. Meadows ⁶⁷, D. Melnychuk ⁴², D. Mendoza Granada ¹⁶, P. Menendez Valdes Perez ⁴⁸, F. M. Meng ^4,l, M. Merk ^38,84, A. Merli ^51,30, L. Meyer Garcia ⁶⁸, D. Miao ^5,7, H. Miao ⁷, M. Mikhasenko ⁸⁰, D. A. Milanes ^78,w, A. Minotti ^31,c, E. Minucci ²⁸, T. Miralles ¹¹, B. Mitreska ⁶⁴, D. S. Mitzel ¹⁹, R. Mocanu ⁴³, A. Modak ⁵⁹, L. Moeser ¹⁹, R. D. Moise ¹⁷, E. F. Molina Cardenas ⁸⁸, T. Mombächer⁶⁷, M. Monk ⁵⁷, T. Monnard ⁵¹, S. Monteil ¹¹, A. Morcillo Gomez ⁴⁸, G. Morello ²⁸, M. J. Morello ^35,j, M. P. Morgenthaler ²², A. Moro ^31,c, J. Moron ⁴⁰, W. Morren ³⁸, A. B. Morris ^82,50, A. G. Morris ¹³, R. Mountain ⁷⁰, Z. Mu ⁶, E. Muhammad ⁵⁸, F. Muheim ⁶⁰, M. Mulder ³⁸, K. Müller⁵², F. Muñoz-Rojas⁹, V. Mytrochenko ⁵³, P. Naik ⁶², T. Nakada ⁵¹, R. Nandakumar ⁵⁹, G. Napoletano ⁵¹, I. Nasteva ³, M. Needham ⁶⁰, E. Nekrasova ⁴⁴, N. Neri ^30,k, S. Neubert ¹⁸, N. Neufeld ⁵⁰, P. Neustroev⁴⁴, J. Nicolini ⁵⁰, D. Nicotra ⁸⁴, E. M. Niel ¹⁵, N. Nikitin ⁴⁴, L. Nisi ¹⁹, Q. Niu ⁷⁵, B. K. Njoki ⁵⁰, P. Nogarolli ³, P. Nogga ¹⁸, C. Normand ⁴⁸, J. Novoa Fernandez ⁴⁸, G. Nowak ⁶⁷, C. Nunez ⁸⁸, H. N. Nur ⁶¹, A. Oblakowska-Mucha ⁴⁰, V. Obraztsov ⁴⁴, T. Oeser ¹⁷, A. Okhotnikov⁴⁴, O. Okhrimenko ⁵⁴, R. Oldeman ^32,n, F. Oliva ^60,50, E. Olivart Pino ⁴⁶, M. Olocco ¹⁹, R. H. O’Neil ⁵⁰, J. S. Ordonez Soto ¹¹, D. Osthues ¹⁹, J. M. Otalora Goicochea ³, P. Owen ⁵², A. Oyanguren ⁴⁹, O. Ozcelik ⁵⁰, F. Paciolla ^35,x, A. Padee ⁴², K. O. Padeken ¹⁸, B. Pagare ⁴⁸, T. Pajero ⁵⁰, A. Palano ²⁴, L. Palini ³⁰, M. Palutan ²⁸, C. Pan ⁷⁶, X. Pan ^4,l, S. Panebianco ¹², S. Paniskaki ^50,33, G. Panshin ⁵, L. Paolucci ⁶⁴, A. Papanestis ⁵⁹, M. Pappagallo ^24,p, L. L. Pappalardo ²⁶, C. Pappenheimer ⁶⁷, C. Parkes ⁶⁴, D. Parmar ⁸⁰, G. Passaleva ²⁷, D. Passaro ^35,j, A. Pastore ²⁴, M. Patel ⁶³, J. Patoc ⁶⁵, C. Patrignani ^25,h, A. Paul ⁷⁰, C. J. Pawley ⁸⁴, A. Pellegrino ³⁸, J. Peng ^5,7, X. Peng⁷⁵, M. Pepe Altarelli ²⁸, S. Perazzini ²⁵, D. Pereima ⁴⁴, H. Pereira Da Costa ⁶⁹, M. Pereira Martinez ⁴⁸, A. Pereiro Castro ⁴⁸, C. Perez ⁴⁷, P. Perret ¹¹, A. Perrevoort ⁸³, A. Perro ⁵⁰, M. J. Peters ⁶⁷, K. Petridis ⁵⁶, A. Petrolini ^29,i, S. Pezzulo ^29,i, J. P. Pfaller ⁶⁷, H. Pham ⁷⁰, L. Pica ^35,j, M. Piccini ³⁴, L. Piccolo ³², B. Pietrzyk ¹⁰, G. Pietrzyk ¹⁴, R. N. Pilato ⁶², D. Pinci ³⁶, F. Pisani ⁵⁰, M. Pizzichemi ^31,50,c, V. M. Placinta ⁴³, M. Plo Casasus ⁴⁸, T. Poeschl ⁵⁰, F. Polci ¹⁶, M. Poli Lener ²⁸, A. Poluektov ¹³, N. Polukhina ⁴⁴, I. Polyakov ⁶⁴, E. Polycarpo ³, S. Ponce ⁵⁰, D. Popov ^7,50, K. Popp ¹⁹, S. Poslavskii ⁴⁴, K. Prasanth ⁶⁰, C. Prouve ⁴⁵, D. Provenzano ^32,50,n, V. Pugatch ⁵⁴, A. Puicercus Gomez ⁵⁰, G. Punzi ^35,s, J. R. Pybus ⁶⁹, Q. Qian ⁶, W. Qian ⁷, N. Qin ^4,l, R. Quagliani ⁵⁰, R. I. Rabadan Trejo ⁵⁸, R. Racz ⁸², J. H. Rademacker ⁵⁶, M. Rama ³⁵, M. Ramírez García ⁸⁸, V. Ramos De Oliveira ⁷¹, M. Ramos Pernas ⁵⁸, M. S. Rangel ³, F. Ratnikov ⁴⁴, G. Raven ³⁹, M. Rebollo De Miguel ⁴⁹, F. Redi ^30,v, J. Reich ⁵⁶, F. Reiss ²⁰, Z. Ren ⁷, P. K. Resmi ⁶⁵, M. Ribalda Galvez ⁴⁶, R. Ribatti ⁵¹, G. Ricart ¹², D. Riccardi ^35,j, S. Ricciardi ⁵⁹, K. Richardson ⁶⁶, M. Richardson-Slipper ⁵⁷, F. Riehn ¹⁹, K. Rinnert ⁶², P. Robbe ^14,50, G. Robertson ⁶¹, E. Rodrigues ⁶², A. Rodriguez Alvarez ⁴⁶, E. Rodriguez Fernandez ⁴⁸, J. A. Rodriguez Lopez ⁷⁸, E. Rodriguez Rodriguez ⁵⁰, J. Roensch ¹⁹, A. Rogachev ⁴⁴, A. Rogovskiy ⁵⁹, D. L. Rolf ¹⁹, P. Roloff ⁵⁰, V. Romanovskiy ⁶⁷, A. Romero Vidal ⁴⁸, G. Romolini ^26,50, F. Ronchetti ⁵¹, T. Rong ⁶, M. Rotondo ²⁸, M. S. Rudolph ⁷⁰, M. Ruiz Diaz ²², R. A. Ruiz Fernandez ⁴⁸, J. Ruiz Vidal ⁸⁴, J. J. Saavedra-Arias ⁹, J. J. Saborido Silva ⁴⁸, S. E. R. Sacha Emile R.⁵⁰, N. Sagidova ⁴⁴, D. Sahoo ⁸¹, N. Sahoo ⁵⁵, B. Saitta ³², M. Salomoni ^31,50,c, I. Sanderswood ⁴⁹, R. Santacesaria ³⁶, C. Santamarina Rios ⁴⁸, M. Santimaria ²⁸, L. Santoro ², E. Santovetti ³⁷, A. Saputi ^26,50, D. Saranin ⁴⁴, A. Sarnatskiy ⁸³, G. Sarpis ⁵⁰, M. Sarpis ⁸², C. Satriano ³⁶, A. Satta ³⁷, M. Saur ⁷⁵, D. Savrina ⁴⁴, H. Sazak ¹⁷, F. Sborzacchi ^50,28, A. Scarabotto ¹⁹, S. Schael ¹⁷, S. Scherl ⁶², M. Schiller ²², H. Schindler ⁵⁰, M. Schmelling ²¹, B. Schmidt ⁵⁰, N. Schmidt ⁶⁹, S. Schmitt ⁶⁶, H. Schmitz¹⁸, O. Schneider ⁵¹, A. Schopper ⁶³, N. Schulte ¹⁹, M. H. Schune ¹⁴, G. Schwering ¹⁷, B. Sciascia ²⁸, A. Sciuccati ⁵⁰, G. Scriven ⁸⁴, I. Segal ⁸⁰, S. Sellam ⁴⁸, A. Semennikov ⁴⁴, T. Senger ⁵², M. Senghi Soares ³⁹, A. Sergi ^29,i, N. Serra ⁵², L. Sestini ²⁷, B. Sevilla Sanjuan ⁴⁷, Y. Shang ⁶, D. M. Shangase ⁸⁸, M. Shapkin ⁴⁴, R. S. Sharma ⁷⁰, I. Shchemerov ⁴⁴, L. Shchutska ⁵¹, T. Shears ⁶², L. Shekhtman ⁴⁴, J. Shen⁶, Z. Shen ³⁸, S. Sheng ⁵¹, V. Shevchenko ⁴⁴, B. Shi ⁷, J. Shi ⁵⁷, Q. Shi ⁷, W. S. Shi ⁷⁴, Y. Shimizu ¹⁴, E. Shmanin ²⁵, R. Shorkin ⁴⁴, R. Silva Coutinho ², G. Simi ^33,u, S. Simone ^24,p, M. Singha ⁸¹, I. Siral ⁵¹, N. Skidmore ⁵⁸, T. Skwarnicki ⁷⁰, M. W. Slater ⁵⁵, E. Smith ⁶⁶, M. Smith ⁶³, L. Soares Lavra ⁶⁰, M. D. Sokoloff ⁶⁷, F. J. P. Soler ⁶¹, A. Solomin ⁵⁶, A. Solovev ⁴⁴, K. Solovieva ²⁰, N. S. Sommerfeld ¹⁸, R. Song ¹, Y. Song ⁵¹, Y. Song ^4,l, Y. S. Song ⁶, F. L. Souza De Almeida ⁴⁶, B. Souza De Paula ³, K. M. Sowa ⁴⁰, E. Spadaro Norella ^29,i, E. Spedicato ²⁵, J. G. Speer ¹⁹, P. Spradlin ⁶¹, F. Stagni ⁵⁰, M. Stahl ⁸⁰, S. Stahl ⁵⁰, S. Stanislaus ⁶⁵, M. Stefaniak ⁹⁰, O. Steinkamp ⁵², D. Strekalina ⁴⁴, Y. Su ⁷, F. Suljik ⁶⁵, J. Sun ³², J. Sun ⁶⁴, L. Sun ⁷⁶, D. Sundfeld ², W. Sutcliffe ⁵², P. Svihra ⁷⁹, V. Svintozelskyi ⁴⁹, K. Swientek ⁴⁰, F. Swystun ⁵⁷, A. Szabelski ⁴², T. Szumlak ⁴⁰, Y. Tan ⁴, Y. Tang ⁷⁶, Y. T. Tang ⁷, M. D. Tat ²², J. A. Teijeiro Jimenez ⁴⁸, A. Terentev ⁴⁴, F. Terzuoli ^35,x, F. Teubert ⁵⁰, E. Thomas ⁵⁰, D. J. D. Thompson ⁵⁵, A. R. Thomson-Strong ⁶⁰, H. Tilquin ⁶³, V. Tisserand ¹¹, S. T’Jampens ¹⁰, M. Tobin ^5,50, T. T. Todorov ²⁰, L. Tomassetti ^26,f, G. Tonani ³⁰, X. Tong ⁶, T. Tork ³⁰, L. Toscano ¹⁹, D. Y. Tou ^4,l, C. Trippl ⁴⁷, G. Tuci ²², N. Tuning ³⁸, L. H. Uecker ²², A. Ukleja ⁴⁰, D. J. Unverzagt ²², A. Upadhyay ⁵⁰, B. Urbach ⁶⁰, A. Usachov ³⁸, A. Ustyuzhanin ⁴⁴, U. Uwer ²², V. Vagnoni ^25,50, A. Vaitkevicius ⁸², V. Valcarce Cadenas ⁴⁸, G. Valenti ²⁵, N. Valls Canudas ⁵⁰, J. van Eldik ⁵⁰, H. Van Hecke ⁶⁹, E. van Herwijnen ⁶³, C. B. Van Hulse ^48,y, R. Van Laak ⁵¹, M. van Veghel ⁸⁴, G. Vasquez ⁵², R. Vazquez Gomez ⁴⁶, P. Vazquez Regueiro ⁴⁸, C. Vázquez Sierra⁴⁵, S. Vecchi ²⁶, J. Velilla Serna ⁴⁹, J. J. Velthuis ⁵⁶, M. Veltri ^27,z, A. Venkateswaran ⁵¹, M. Verdoglia ³², M. Vesterinen ⁵⁸, W. Vetens ⁷⁰, D. Vico Benet ⁶⁵, P. Vidrier Villalba ⁴⁶, M. Vieites Diaz ⁴⁸, X. Vilasis-Cardona ⁴⁷, E. Vilella Figueras ⁶², A. Villa ²⁵, P. Vincent ¹⁶, B. Vivacqua ³, F. C. Volle ⁵⁵, D. vom Bruch ¹³, N. Voropaev ⁴⁴, K. Vos ⁸⁴, C. Vrahas ⁶⁰, J. Wagner ¹⁹, J. Walsh ³⁵, E. J. Walton ¹, G. Wan ⁶, A. Wang ⁷, B. Wang ⁵, C. Wang ²², G. Wang ⁸, H. Wang ⁷⁵, J. Wang ⁷, J. Wang ⁵, J. Wang ^4,l, J. Wang ⁷⁶, M. Wang ⁵⁰, N. W. Wang ⁷, R. Wang ⁵⁶, X. Wang ⁸, X. Wang ⁷⁴, X. W. Wang ⁶³, Y. Wang ⁷⁷, Y. Wang ⁶, Y. H. Wang ⁷⁵, Z. Wang ¹⁴, Z. Wang ³⁰, J. A. Ward ^58,1, M. Waterlaat ⁵⁰, N. K. Watson ⁵⁵, D. Websdale ⁶³, Y. Wei ⁶, Z. Weida ⁷, J. Wendel ⁴⁵, B. D. C. Westhenry ⁵⁶, C. White ⁵⁷, M. Whitehead ⁶¹, E. Whiter ⁵⁵, A. R. Wiederhold ⁶⁴, D. Wiedner ¹⁹, M. A. Wiegertjes ³⁸, C. Wild ⁶⁵, G. Wilkinson ^65,50, M. K. Wilkinson ⁶⁷, M. Williams ⁶⁶, M. J. Williams ⁵⁰, M. R. J. Williams ⁶⁰, R. Williams ⁵⁷, S. Williams ⁵⁶, Z. Williams ⁵⁶, F. F. Wilson ⁵⁹, M. Winn ¹², W. Wislicki ⁴², M. Witek ⁴¹, L. Witola ¹⁹, T. Wolf ²², E. Wood ⁵⁷, G. Wormser ¹⁴, S. A. Wotton ⁵⁷, H. Wu ⁷⁰, J. Wu ⁸, X. Wu ⁷⁶, Y. Wu ^6,57, Z. Wu ⁷, K. Wyllie ⁵⁰, S. Xian ⁷⁴, Z. Xiang ⁵, Y. Xie ⁸, T. X. Xing ³⁰, A. Xu ^35,j, L. Xu ^4,l, M. Xu ⁵⁰, Z. Xu ⁵⁰, Z. Xu ⁷, Z. Xu ⁵, S. Yadav ²⁶, K. Yang ⁶³, X. Yang ⁶, Y. Yang ⁸¹, Y. Yang ⁷, Z. Yang ⁶, H. Yeung ⁶⁴, H. Yin ⁸, X. Yin ⁷, C. Y. Yu ⁶, J. Yu ⁷³, X. Yuan ⁵, Y Yuan ^5,7, J. A. Zamora Saa ⁷², M. Zavertyaev ²¹, M. Zdybal ⁴¹, F. Zenesini ²⁵, C. Zeng ^5,7, M. Zeng ^4,l, C. Zhang ⁶, D. Zhang ⁸, J. Zhang ⁷, L. Zhang ^4,l, R. Zhang ⁸, S. Zhang ⁶⁵, S. L. Zhang ⁷³, Y. Zhang ⁶, Y. Z. Zhang ^4,l, Z. Zhang ^4,l, Y. Zhao ²², A. Zhelezov ²², S. Z. Zheng ⁶, X. Z. Zheng ^4,l, Y. Zheng ⁷, T. Zhou ⁶, X. Zhou ⁸, V. Zhovkovska ⁵⁸, L. Z. Zhu ⁷, X. Zhu ^4,l, X. Zhu ⁸, Y. Zhu ¹⁷, V. Zhukov ¹⁷, J. Zhuo ⁴⁹, D. Zuliani ^33,u, and G. Zunica ²⁸ (LHCb Collaboration)

¹School of Physics and Astronomy, Monash University, Melbourne, Australia
²Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
³Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
⁴Department of Engineering Physics, Tsinghua University, Beijing, China
⁵Institute Of High Energy Physics (IHEP), Beijing, China
⁶School of Physics State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
⁷University of Chinese Academy of Sciences, Beijing, China
⁸Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China
⁹Consejo Nacional de Rectores (CONARE), San Jose, Costa Rica
¹⁰Université Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France
¹¹Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France
¹²Université Paris-Saclay, Centre d’Etudes de Saclay (CEA), IRFU, Gif-Sur-Yvette, France
¹³Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France
¹⁴Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
¹⁵Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
¹⁶Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Sorbonne Université, CNRS/IN2P3, Paris, France
¹⁷I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany
¹⁸Universität Bonn - Helmholtz-Institut für Strahlen und Kernphysik, Bonn, Germany
¹⁹Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
²⁰Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
²¹Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
²²Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
²³School of Physics, University College Dublin, Dublin, Ireland
²⁴INFN Sezione di Bari, Bari, Italy
²⁵INFN Sezione di Bologna, Bologna, Italy
²⁶INFN Sezione di Ferrara, Ferrara, Italy
²⁷INFN Sezione di Firenze, Firenze, Italy
²⁸INFN Laboratori Nazionali di Frascati, Frascati, Italy
²⁹INFN Sezione di Genova, Genova, Italy
³⁰INFN Sezione di Milano, Milano, Italy
³¹INFN Sezione di Milano-Bicocca, Milano, Italy
³²INFN Sezione di Cagliari, Monserrato, Italy
³³INFN Sezione di Padova, Padova, Italy
³⁴INFN Sezione di Perugia, Perugia, Italy
³⁵INFN Sezione di Pisa, Pisa, Italy
³⁶INFN Sezione di Roma La Sapienza, Roma, Italy
³⁷INFN Sezione di Roma Tor Vergata, Roma, Italy
³⁸Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands
³⁹Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands
⁴⁰AGH - University of Krakow, Faculty of Physics and Applied Computer Science, Kraków, Poland
⁴¹Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
⁴²National Center for Nuclear Research (NCBJ), Warsaw, Poland
⁴³Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
⁴⁴Authors affiliated with an institute formerly covered by a cooperation agreement with CERN
⁴⁵Universidade da Coruña, A Coruña, Spain
⁴⁶ICCUB, Universitat de Barcelona, Barcelona, Spain
⁴⁷La Salle, Universitat Ramon Llull, Barcelona, Spain
⁴⁸Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
⁴⁹Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia - CSIC, Valencia, Spain
⁵⁰European Organization for Nuclear Research (CERN), Geneva, Switzerland
⁵¹Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
⁵²Physik-Institut, Universität Zürich, Zürich, Switzerland
⁵³NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
⁵⁴Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
⁵⁵School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom
⁵⁶H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
⁵⁷Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
⁵⁸Department of Physics, University of Warwick, Coventry, United Kingdom
⁵⁹STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
⁶⁰School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
⁶¹School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
⁶²Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
⁶³Imperial College London, London, United Kingdom
⁶⁴Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
⁶⁵Department of Physics, University of Oxford, Oxford, United Kingdom
⁶⁶Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
⁶⁷University of Cincinnati, Cincinnati, Ohio, USA
⁶⁸University of Maryland, College Park, Maryland, USA
⁶⁹Los Alamos National Laboratory (LANL), Los Alamos, New Mexico, USA
⁷⁰Syracuse University, Syracuse, New York, USA
⁷¹Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil (associated with Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil)
⁷²Universidad Andres Bello, Santiago, Chile (associated with Physik-Institut, Universität Zürich, Zürich, Switzerland)
⁷³School of Physics and Electronics, Hunan University, Changsha City, China (associated with Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China)
⁷⁴State Key Laboratory of Nuclear Physics and Technology, South China Normal University, Guangzhou, China (associated with Department of Engineering Physics, Tsinghua University, Beijing, China)
⁷⁵Lanzhou University, Lanzhou, China [associated with Institute Of High Energy Physics (IHEP), Beijing, China]
⁷⁶School of Physics and Technology, Wuhan University, Wuhan, China (associated with Department of Engineering Physics, Tsinghua University, Beijing, China)
⁷⁷Henan Normal University, Xinxiang, China (associated with Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China)
⁷⁸Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia (associated with Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Sorbonne Université, CNRS/IN2P3, Paris, France)
⁷⁹Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic (associated with Department of Physics and Astronomy, University of Manchester, Manchester, United Kingdom)
⁸⁰Ruhr Universitaet Bochum, Fakultaet f. Physik und Astronomie, Bochum, Germany (associated with Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany)
⁸¹Eotvos Lorand University, Budapest, Hungary (associated with European Organization for Nuclear Research (CERN), Geneva, Switzerland)
⁸²Faculty of Physics, Vilnius University, Vilnius, Lithuania (associated with Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany)
⁸³Van Swinderen Institute, University of Groningen, Groningen, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands)
⁸⁴Universiteit Maastricht, Maastricht, Netherlands (associated with Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands)
⁸⁵Tadeusz Kosciuszko Cracow University of Technology, Cracow, Poland (associated with Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland)
⁸⁶Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden (associated with School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom)
⁸⁷Taras Schevchenko University of Kyiv, Faculty of Physics, Kyiv, Ukraine (associated with Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France)
⁸⁸University of Michigan, Ann Arbor, Michigan, USA (associated with Syracuse University, Syracuse, New York, USA)
⁸⁹Indiana University, Bloomington, Indiana, USA [associated with Los Alamos National Laboratory (LANL), Los Alamos, New Mexico, USA]
⁹⁰Ohio State University, Columbus, Ohio, USA [associated with Los Alamos National Laboratory (LANL), Los Alamos, New Mexico, USA]

^*Full author list given at the end of the Letter.
^aDeceased.
^bAlso at Lamarr Institute for Machine Learning and Artificial Intelligence, Dortmund, Germany.
^cAlso at Università degli Studi di Milano-Bicocca, Milano, Italy.
^dAlso at Università di Modena e Reggio Emilia, Modena, Italy.
^eAlso at Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia, Canada.
^fAlso at Università di Ferrara, Ferrara, Italy.
^gAlso at Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil.
^hAlso at Università di Bologna, Bologna, Italy.
ⁱAlso at Università di Genova, Genova, Italy.
^jAlso at Scuola Normale Superiore, Pisa, Italy.
^kAlso at Università degli Studi di Milano, Milano, Italy.
^lAlso at Center for High Energy Physics, Tsinghua University, Beijing, China.
^mAlso at Universidad Nacional Autónoma de Honduras, Tegucigalpa, Honduras.
ⁿAlso at Università di Cagliari, Cagliari, Italy.
^oAlso at Centro Federal de Educacão Tecnológica Celso Suckow da Fonseca, Rio De Janeiro, Brazil.
^pAlso at Università di Bari, Bari, Italy.
^qAlso at Università di Perugia, Perugia, Italy.
^rAlso at LIP6, Sorbonne Université, Paris, France.
^sAlso at Università di Pisa, Pisa, Italy.
^tAlso at Hangzhou Institute for Advanced Study, UCAS, Hangzhou, China.
^uAlso at Università di Padova, Padova, Italy.
^vAlso at Università di Bergamo, Bergamo, Italy.
^wAlso at Universidad de Ingeniería y Tecnología (UTEC), Lima, Peru.
^xAlso at Università di Siena, Siena, Italy.
^yAlso at Universidad de Alcalá, Alcalá de Henares, Spain.
^zAlso at Università di Urbino, Urbino, Italy.

PDF

Phys. Rev. Lett. 136, 221801 – Published 1 June, 2026

DOI: https://doi.org/10.1103/c1x7-f9wn

Abstract

The first measurements of the top- and antitop-quark differential production cross sections and the top-quark charge asymmetry in the forward region are presented, using proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of $5.4 {fb}^{- 1}$ . The total production cross sections of top and antitop quarks are also determined. Measurements are performed using the $μ + b -jet$ final state within a fiducial region defined by $b$ -jet $p_{T, jet} > 50 GeV$ and pseudorapidity $2.2 < η_{jet} < 4.0$ , with the muon from the $W$ -boson decay required to have $p_{T, μ} > 25 GeV$ and $2.0 < η_{μ} < 4.5$ . The muon and $b$ -jet system must satisfy $p_{T} (μ + jet) > 20 GeV$ . The measured integrated production cross sections for the top and antitop quarks are $σ_{t} = 0.95 \pm 0.04 \pm 0.08 \pm 0.02 pb$ , $σ_{\bar{t}} = 0.81 \pm 0.03 \pm 0.07 \pm 0.02 pb$ , where the first uncertainty is statistical, the second systematic, and the third accounts for the luminosity uncertainty. The top-quark charge asymmetry is measured to be $A_{C}^{t} = 0.08 \pm 0.03 \pm 0.01$ , where the first uncertainty is statistical and the second is systematic. These results are consistent with next-to-leading order Standard Model predictions.

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References (97)

S. Navas et al. (Particle Data Group), Review of particle physics, Phys. Rev. D 110, 030001 (2024).
A. L. Kagan, J. F. Kamenik, G. Perez, and S. Stone, Probing new top physics at the LHCb experiment, Phys. Rev. Lett. 107, 082003 (2011).
R. Gauld, Feasibility of top quark measurements at LHCb and constraints on the large- $x$ gluon PDF, J. High Energy Phys. 02 (2014) 126.
R. Gauld, Leptonic top quark asymmetry predictions at LHCb, Phys. Rev. D 91, 054029 (2015).
J. M. Campbell, R. K. Ellis, P. Nason, and E. Re, Top-pair production and decay at NLO matched with parton showers, J. High Energy Phys. 04 (2015) 114.
S. Alioli, P. Nason, C. Oleari, and E. Re, NLO single-top production matched with shower in powheg: s- and t-channel contributions, J. High Energy Phys. 09 (2009) 111.
E. Re, Single-top Wt-channel production matched with parton showers using the powheg method, Eur. Phys. J. C 71, 1547 (2011).
M. Czakon, M. L. Mangano, A. Mitov, and J. Rojo, Constraints on the gluon PDF from top quark pair production at hadron colliders, J. High Energy Phys. 07 (2013) 167.
S. Alekhin, M. V. Garzelli, S.-O. Moch, and O. Zenaiev, NNLO PDFs driven by top-quark data, Eur. Phys. J. C 85, 162 (2025).
A. Ablat, M. Guzzi, K. Xie, S. Dulat, T.-J. Hou, I. Sitiwaldi, and C.-P. Yuan, Exploring the impact of high-precision top-quark pair production data on the structure of the proton at the LHC, Phys. Rev. D 109, 054027 (2024).
W. Bernreuther and Z.-G. Si, Top quark and leptonic charge asymmetries for the Tevatron and LHC, Phys. Rev. D 86, 034026 (2012).
S. Chatrchyan et al. (CMS Collaboration), Measurement of the $t \bar{t}$ production cross section in $p p$ collisions at $\sqrt{s} = 7 TeV$ with $lepton + jets$ final states, Phys. Lett. B 720, 83 (2013).
S. Chatrchyan et al. (CMS Collaboration), Measurement of the single-top-quark $t$ -channel cross section in $p p$ collisions at $\sqrt{s} = 7 TeV$ , J. High Energy Phys. 12 (2012) 035.
S. Chatrchyan et al. (CMS Collaboration), Measurement of the $t \bar{t}$ production cross section in the all-jet final state in pp collisions at $\sqrt{s} = 7 TeV$ , J. High Energy Phys. 05 (2013) 065.
G. Aad et al. (ATLAS Collaboration), Comprehensive measurements of $t$ -channel single top-quark production cross sections at $\sqrt{s} = 7 TeV$ with the ATLAS detector, Phys. Rev. D 90, 112006 (2014).
V. Khachatryan et al. (CMS Collaboration), Measurement of the t-channel single-top-quark production cross section and of the $| V_{t b} |$ CKM matrix element in pp collisions at $\sqrt{s} = 8 TeV$ , J. High Energy Phys. 06 (2014) 090.
G. Aad et al. (ATLAS Collaboration), Measurement of the $t \bar{t}$ production cross-section using $e μ$ events with b-tagged jets in pp collisions at $\sqrt{s} = 7$ and 8 TeV with the ATLAS detector, Eur. Phys. J. C 74, 3109 (2014); 76, 642(A) (2016).
V. Khachatryan et al. (CMS Collaboration), Measurement of the $t \bar{t}$ production cross section in the all-jets final state in pp collisions at $\sqrt{s} = 8 TeV$ , Eur. Phys. J. C 76, 128 (2016).
M. Aaboud et al. (ATLAS Collaboration), Measurement of the inclusive cross-sections of single top-quark and top-antiquark $t$ -channel production in $p p$ collisions at $\sqrt{s} = 13 TeV$ with the ATLAS detector, J. High Energy Phys. 04 (2017) 086.
V. Khachatryan et al. (CMS Collaboration), Measurement of the $t \bar{t}$ production cross section in the $e μ$ channel in proton-proton collisions at $\sqrt{s} = 7$ and 8 TeV, J. High Energy Phys. 08 (2016) 029.
V. Khachatryan et al. (CMS Collaboration), Measurements of the $t \bar{t}$ production cross section in $lepton + jets$ final states in pp collisions at 8 TeV and ratio of 8 to 7 TeV cross sections, Eur. Phys. J. C 77, 15 (2017).
M. Aaboud et al. (ATLAS Collaboration), Measurement of the $t \bar{t}$ production cross section in the $τ + jets$ final state in $p p$ collisions at $\sqrt{s} = 8 TeV$ using the ATLAS detector, Phys. Rev. D 95, 072003 (2017).
M. Aaboud et al. (ATLAS Collaboration), Measurement of the inclusive and fiducial $t \bar{t}$ production cross-sections in the $lepton + jets$ channel in $p p$ collisions at $\sqrt{s} = 8 TeV$ with the ATLAS detector, Eur. Phys. J. C 78, 487 (2018).
M. Aaboud et al. (ATLAS Collaboration), Fiducial, total and differential cross-section measurements of $t$ -channel single top-quark production in $p p$ collisions at 8 TeV using data collected by the ATLAS detector, Eur. Phys. J. C 77, 531 (2017).
A. M. Sirunyan et al. (CMS Collaboration), Measurement of the $t \bar{t}$ production cross section, the top quark mass, and the strong coupling constant using dilepton events in pp collisions at $\sqrt{s} = 13 TeV$ , Eur. Phys. J. C 79, 368 (2019).
A. M. Sirunyan et al. (CMS Collaboration), Measurement of the single top quark and antiquark production cross sections in the $t$ channel and their ratio in proton-proton collisions at $\sqrt{s} = 13 TeV$ , Phys. Lett. B 800, 135042 (2020).
A. M. Sirunyan et al. (CMS Collaboration), Measurement of the top quark pair production cross section in dilepton final states containing one $τ$ lepton in pp collisions at $\sqrt{s} = 13 TeV$ , J. High Energy Phys. 02 (2020) 191.
G. Aad et al. (ATLAS Collaboration), Measurements of top-quark pair single- and double-differential cross-sections in the all-hadronic channel in $p p$ collisions at $\sqrt{s} = 13 TeV$ using the ATLAS detector, J. High Energy Phys. 01 (2021) 033.
A. Tumasyan et al. (CMS Collaboration), Measurement of the inclusive $t \bar{t}$ production cross section in proton-proton collisions at $\sqrt{s} = 5.02 TeV$ , J. High Energy Phys. 04 (2022) 144.
A. Tumasyan et al. (CMS Collaboration), Measurement of differential $t \bar{t}$ production cross sections in the full kinematic range using $lepton + jets$ events from proton-proton collisions at $\sqrt{s} = 13 TeV$ , Phys. Rev. D 104, 092013 (2021).
G. Aad et al. (ATLAS, CMS Collaborations), Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at $\sqrt{s} = 7$ and 8 TeV, J. High Energy Phys. 07 (2023) 213.
G. Aad et al. (ATLAS Collaboration), Measurement of the $t \bar{t}$ production cross-section in pp collisions at $\sqrt{s} = 5.02 TeV$ with the ATLAS detector, J. High Energy Phys. 06 (2023) 138.
M. Aaboud et al. (ATLAS Collaboration), Measurement of the inclusive $t \bar{t}$ production cross section in the $lepton + jets$ channel in pp collisions at $\sqrt{s} = 7 TeV$ with the ATLAS detector using support vector machines, Phys. Rev. D 108, 032014 (2023).
G. Aad et al. (ATLAS Collaboration), Inclusive and differential cross-sections for dilepton $t \bar{t}$ production measured in $\sqrt{s} = 13 TeV$ pp collisions with the ATLAS detector, J. High Energy Phys. 07 (2023) 141.
G. Aad et al. (ATLAS Collaboration), Measurement of the $t \bar{t}$ cross section and its ratio to the $Z$ production cross section using $p p$ collisions at $\sqrt{s} = 13.6 TeV$ with the ATLAS detector, Phys. Lett. B 848, 138376 (2024).
A. Tumasyan et al. (CMS Collaboration), First measurement of the top quark pair production cross section in proton-proton collisions at $\sqrt{s} = 13.6 TeV$ , J. High Energy Phys. 08 (2023) 204.
A. Hayrapetyan et al. (CMS Collaboration), Measurement of the inclusive $t \bar{t}$ cross section in final states with at least one lepton and additional jets with $302 {pb}^{- 1}$ of pp collisions at $\sqrt{s} = 5.02 TeV$ , J. High Energy Phys. 04 (2025) 099.
R. Aaij et al. (LHCb Collaboration), First observation of top quark production in the forward region, Phys. Rev. Lett. 115, 112001 (2015).
R. Aaij et al. (LHCb Collaboration), Measurement of forward $t \bar{t}$ , $W + b \bar{b}$ and $W + c \bar{c}$ production in $p$ $p$ collisions at $\sqrt{s} = 8 TeV$ , Phys. Lett. B 767, 110 (2017).
R. Aaij et al. (LHCb Collaboration), Measurement of forward top pair production in the dilepton channel in $p$ $p$ collisions at $\sqrt{s} = 13 TeV$ , J. High Energy Phys. 08 (2018) 174.
T. Aaltonen et al. (CDF Collaboration), Evidence for a mass dependent forward-backward asymmetry in top quark pair production, Phys. Rev. D 83, 112003 (2011).
V. M. Abazov et al. (D0 Collaboration), Simultaneous measurement of forward-backward asymmetry and top polarization in dilepton final states from $t \bar{t}$ production at the Tevatron, Phys. Rev. D 92, 052007 (2015).
T. Aaltonen et al. (CDF Collaboration), Measurement of the top quark forward-backward production asymmetry and its dependence on event kinematic properties, Phys. Rev. D 87, 092002 (2013).
M. Czakon, P. Fiedler, and A. Mitov, Resolving the Tevatron top quark forward-backward asymmetry puzzle: Fully differential next-to-next-to-leading-order calculation, Phys. Rev. Lett. 115, 052001 (2015).
V. M. Abazov et al. (D0 Collaboration), Measurement of the forward-backward asymmetry in top quark-antiquark production in $p \bar{p}$ collisions using the $lepton + jets$ channel, Phys. Rev. D 90, 072011 (2014).
N. Kidonakis, Top quark forward-backward asymmetry at approximate $N^{3} LO$ , Phys. Rev. D 91, 071502(R) (2015).
T. A. Aaltonen et al. (CDF, D0 Collaborations), Combined forward-backward asymmetry measurements in top-antitop quark production at the Tevatron, Phys. Rev. Lett. 120, 042001 (2018).
G. Aad et al. (ATLAS Collaboration), Measurement of the top quark pair production charge asymmetry in proton-proton collisions at $\sqrt{s} = 7 TeV$ using the ATLAS detector, J. High Energy Phys. 02 (2014) 107.
G. Aad et al. (ATLAS Collaboration), Measurement of the charge asymmetry in dileptonic decays of top quark pairs in $p p$ collisions at $\sqrt{s} = 7 TeV$ using the ATLAS detector, J. High Energy Phys. 05 (2015) 061.
G. Aad et al. (ATLAS Collaboration), Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at $\sqrt{s} = 8 TeV$ with the ATLAS detector, Eur. Phys. J. C 76, 87 (2016); 77, 564(E) (2017).
G. Aad et al. (ATLAS Collaboration), Measurement of the charge asymmetry in highly boosted top-quark pair production in $\sqrt{s} = 8 TeV$ $p p$ collision data collected by the ATLAS experiment, Phys. Lett. B 756, 52 (2016).
G. Aad et al. (ATLAS Collaboration), Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment, Phys. Lett. B 843, 137848 (2023).
G. Aad et al. (ATLAS Collaboration), Evidence for the charge asymmetry in $pp \to t \bar{t}$ production at $\sqrt{s} = 13 TeV$ with the ATLAS detector, J. High Energy Phys. 08 (2023) 077.
S. Chatrchyan et al. (CMS Collaboration), Inclusive and differential measurements of the $t \bar{t}$ charge asymmetry in proton-proton collisions at $\sqrt{s} = 7 TeV$ , Phys. Lett. B 717, 129 (2012).
S. Chatrchyan et al. (CMS Collaboration), Measurements of the $t \bar{t}$ charge asymmetry using the dilepton decay channel in pp collisions at $\sqrt{s} = 7 TeV$ , J. High Energy Phys. 04 (2014) 191.
V. Khachatryan et al. (CMS Collaboration), Measurement of the charge asymmetry in top quark pair production in pp collisions at $\sqrt{s} = 8 TeV$ using a template method, Phys. Rev. D 93, 034014 (2016).
V. Khachatryan et al. (CMS Collaboration), Inclusive and differential measurements of the $t \bar{t}$ charge asymmetry in pp collisions at $\sqrt{s} = 8 TeV$ , Phys. Lett. B 757, 154 (2016).
V. Khachatryan et al. (CMS Collaboration), Measurements of $t \bar{t}$ charge asymmetry using dilepton final states in pp collisions at $\sqrt{s} = 8 TeV$ , Phys. Lett. B 760, 365 (2016).
Charge-conjugate states are implied throughout this Letter.
Natural units with $ℏ = c = 1$ are used throughout.
M. Cacciari, G. P. Salam, and G. Soyez, The anti- $k_{t}$ jet clustering algorithm, J. High Energy Phys. 04 (2008) 063.
R. Aaij et al. (LHCb Collaboration), Study of forward $Z + jet$ production in $p$ $p$ collisions at $\sqrt{s} = 7 TeV$ , J. High Energy Phys. 01 (2014) 033.
A. A. Alves Jr. et al. (LHCb Collaboration), The LHCb detector at the LHC, J. Instrum. 3, S08005 (2008).
LHCb Collaboration, LHCb detector performance, Int. J. Mod. Phys. A 30, 1530022 (2015).
R. Aaij et al., Performance of the LHCb Vertex Locator, J. Instrum. 9, P09007 (2014).
P. d’Argent et al., Improved performance of the LHCb Outer Tracker in LHC Run 2, J. Instrum. 12, P11016 (2017).
M. Adinolfi et al., Performance of the LHCb RICH detector at the LHC, Eur. Phys. J. C 73, 2431 (2013).
A. A. Alves Jr. et al., Performance of the LHCb muon system, J. Instrum. 8, P02022 (2013).
R. Aaij et al., The LHCb trigger and its performance in 2011, J. Instrum. 8, P04022 (2013).
R. Aaij et al., Design and performance of the LHCb trigger and full real-time reconstruction in Run 2 of the LHC, J. Instrum. 14, P04013 (2019).
T. Sjöstrand, S. Mrenna, and P. Skands, A brief introduction to pythia 8.1, Comput. Phys. Commun. 178, 852 (2008).
I. Belyaev et al., Handling of the generation of primary events in Gauss, the LHCb simulation framework, J. Phys. Conf. Ser. 331, 032047 (2011).
N. Davidson, T. Przedzinski, and Z. Was, photos interface in c++: Technical and physics documentation, Comput. Phys. Commun. 199, 86 (2016).
J. Allison et al. (geant4 Collaboration), geant4 developments and applications, IEEE Trans. Nucl. Sci. 53, 270 (2006); S. Agostinelli et al. (geant4 Collaboration), geant4: A simulation toolkit, Nucl. Instrum. Methods Phys. Res., Sect. A 506, 250 (2003).
M. Clemencic, G. Corti, S. Easo, C. R. Jones, S. Miglioranzi, M. Pappagallo, and P. Robbe, The LHCb simulation application, Gauss: Design, evolution and experience, J. Phys. Conf. Ser. 331, 032023 (2011).
P. Nason, A new method for combining NLO QCD with shower Monte Carlo algorithms, J. High Energy Phys. 11 (2004) 040.
S. Frixione, P. Nason, and C. Oleari, Matching NLO QCD computations with parton shower simulations: The powheg method, J. High Energy Phys. 11 (2007) 070.
S. Alioli, P. Nason, C. Oleari, and E. Re, A general framework for implementing NLO calculations in shower Monte Carlo programs: The powheg BOX, J. High Energy Phys. 06 (2010) 043.
J. Alwall, R. Frederix, S. Frixione, V. Hirschi, F. Maltoni, O. Mattelaer, H.-S. Shao, T. Stelzer, P. Torrielli, and M. Zaro, The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations, J. High Energy Phys. 07 (2014) 079.
R. Aaij et al. (LHCb Collaboration), Measurement of forward $W$ and $Z$ boson production in association with jets in proton-proton collisions at $\sqrt{s} = 8 TeV$ , J. High Energy Phys. 05 (2016) 131.
E. Bols, J. Kieseler, M. Verzetti, M. Stoye, and A. Stakia, Jet flavour classification using DeepJet, J. Instrum. 15, P12012 (2020).
R. Aaij et al. (LHCb Collaboration), Search for $H \to b \bar{b}$ and $H \to c \bar{c}$ in $\sqrt{s} = 13 TeV$ $p p$ collisions at LHCb using machine learning techniques, LHCb-PAPER-2025-034, arXiv:2601.16802.
G. Aad et al. (ATLAS Collaboration), Measurement of the inclusive isolated prompt photon cross section in $p p$ collisions at $\sqrt{s} = 7 TeV$ with the ATLAS detector, Phys. Rev. D 83, 052005 (2011).
R. Aaij et al. (LHCb Collaboration), Precision measurement of forward $Z$ boson production in proton-proton collisions at $\sqrt{s} = 13 TeV$ , J. High Energy Phys. 07 (2022) 026.
R. Aaij et al. (LHCb Collaboration), Measurement of the forward $W$ boson production cross-section in $p$ $p$ collisions at $\sqrt{s} = 7 TeV$ , J. High Energy Phys. 12 (2014) 079.
R. Aaij et al. (LHCb Collaboration), Measurement of the forward $Z$ boson cross-section in $p$ $p$ collisions at $\sqrt{s} = 7 TeV$ , J. High Energy Phys. 08 (2015) 039.
R. Aaij et al. (LHCb Collaboration), Measurement of forward $W$ and $Z$ boson production in $p$ $p$ collisions at $\sqrt{s} = 8 TeV$ , J. High Energy Phys. 01 (2016) 155.
R. Aaij et al. (LHCb Collaboration), Measurement of differential $b \bar{b}$ and $c \bar{c}$ dijet cross-sections in the forward region of $p p$ collisions at $\sqrt{s} = 13 TeV$ , J. High Energy Phys. 02 (2021) 023.
R. Aaij et al. (LHCb Collaboration), Study of $W$ boson production in association with beauty and charm, Phys. Rev. D 92, 052001 (2015).
S. Dittmaier et al. (LHC Higgs Cross Section Working Group), Handbook of LHC Higgs cross sections: 1. inclusive observables, 10.5170/CERN-2011-002.
LHCb Collaboration, Precision luminosity measurements at LHCb, J. Instrum. 9, P12005 (2014).
T. Ježo and P. Nason, On the treatment of resonances in next-to-leading order calculations matched to a parton shower, J. High Energy Phys. 12 (2015) 065.
T.-J. Hou et al., New CTEQ global analysis of quantum chromodynamics with high-precision data from the LHC, Phys. Rev. D 103, 014013 (2021).
R. D. Ball et al. (NNPDF Collaboration), Parton distributions from high-precision collider data, Eur. Phys. J. C 77, 663 (2017).
D. Bourilkov, R. C. Group, and M. R. Whalley, LHAPDF: PDF use from the Tevatron to the LHC, in TeV4LHC Workshop—4th Meeting (2006), arXiv:hep-ph/0605240.
J. V. Mead, A measurement of top quark production at $\sqrt{s} = 13 TeV$ with LHCb data, CERN-THESIS-2021-130, 2021, https://cds.cern.ch/record/2780780.
LHCb Collaboration, Measurement of the top-quark production cross-section and charge asymmetry at LHCb, LHCb-PAPER-2025-057-cds, https://cds.cern.ch/record/2951095.

Phys. Rev. Lett. 136, 221801– Published 1 June, 2026

Vol. 136, Iss. 22 — 5 June 2026

Received 15 December 2025
Revised 11 February 2026
Accepted 20 April 2026

DOI: https://doi.org/10.1103/c1x7-f9wn

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

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Measurement of the Top-Quark Production Cross Section and Charge Asymmetry at LHCb

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