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Measurement of Antiproton Production in pHe Collisions at sNN=110GeV

R. Aaij28, C. Abellán Beteta45, B. Adeva42, M. Adinolfi49, C. A. Aidala74, Z. Ajaltouni5, S. Akar60, P. Albicocco19, J. Albrecht10 et al. (LHCb Collaboration)

J. Albrecht10, F. Alessio43, M. Alexander54, A. Alfonso Albero41, G. Alkhazov34, P. Alvarez Cartelle56, A. A. Alves, Jr42, S. Amato2, S. Amerio24, Y. Amhis7, L. An3, L. Anderlini17, G. Andreassi44, M. Andreotti16, J. E. Andrews61, R. B. Appleby57, F. Archilli28, P. d’Argent12, J. Arnau Romeu6, A. Artamonov40, M. Artuso62, K. Arzymatov38, E. Aslanides6, M. Atzeni45, B. Audurier23, S. Bachmann12, J. J. Back51, S. Baker56, V. Balagura7,a, W. Baldini16, A. Baranov38, R. J. Barlow57, S. Barsuk7, W. Barter57, F. Baryshnikov71, V. Batozskaya32, B. Batsukh62, V. Battista44, A. Bay44, J. Beddow54, F. Bedeschi25, I. Bediaga1, A. Beiter62, L. J. Bel28, S. Belin23, N. Beliy64, V. Bellee44, N. Belloli21,b, K. Belous40, I. Belyaev35,43, E. Ben-Haim8, G. Bencivenni19, S. Benson28, S. Beranek9, A. Berezhnoy36, R. Bernet45, D. Berninghoff12, E. Bertholet8, A. Bertolin24, C. Betancourt45, F. Betti15,43, M. O. Bettler50, M. van Beuzekom28, Ia. Bezshyiko45, S. Bhasin49, J. Bhom30, S. Bifani48, P. Billoir8, A. Birnkraut10, A. Bizzeti17,c, M. Bjørn58, M. P. Blago43, T. Blake51, F. Blanc44, S. Blusk62, D. Bobulska54, V. Bocci27, O. Boente Garcia42, T. Boettcher59, A. Bondar39,d, N. Bondar34, S. Borghi57,43, M. Borisyak38, M. Borsato42, F. Bossu7, M. Boubdir9, T. J. V. Bowcock55, C. Bozzi16,43, S. Braun12, M. Brodski43, J. Brodzicka30, A. Brossa Gonzalo51, D. Brundu23, E. Buchanan49, A. Buonaura45, C. Burr57, A. Bursche23, J. Buytaert43, W. Byczynski43, S. Cadeddu23, H. Cai65, R. Calabrese16,e, R. Calladine48, M. Calvi21,b, M. Calvo Gomez41,f, A. Camboni41,f, P. Campana19, D. H. Campora Perez43, L. Capriotti15, A. Carbone15,g, G. Carboni26, R. Cardinale20,h, A. Cardini23, P. Carniti21,b, L. Carson53, K. Carvalho Akiba2, G. Casse55, L. Cassina21, M. Cattaneo43, G. Cavallero20,h, R. Cenci25,i, D. Chamont7, M. G. Chapman49, M. Charles8, Ph. Charpentier43, G. Chatzikonstantinidis48, M. Chefdeville4, V. Chekalina38, C. Chen3, S. Chen23, S.-G. Chitic43, V. Chobanova42, M. Chrzaszcz43, A. Chubykin34, P. Ciambrone19, X. Cid Vidal42, G. Ciezarek43, P. E. L. Clarke53, M. Clemencic43, H. V. Cliff50, J. Closier43, V. Coco43, J. A. B. Coelho7, J. Cogan6, E. Cogneras5, L. Cojocariu33, P. Collins43, T. Colombo43, A. Comerma-Montells12, A. Contu23, G. Coombs43, S. Coquereau41, G. Corti43, M. Corvo16,e, C. M. Costa Sobral51, B. Couturier43, G. A. Cowan53, D. C. Craik59, A. Crocombe51, M. Cruz Torres1, R. Currie53, C. D’Ambrosio43, F. Da Cunha Marinho2, C. L. Da Silva75, E. Dall’Occo28, J. Dalseno49, A. Danilina35, A. Davis3, O. De Aguiar Francisco43, K. De Bruyn43, S. De Capua57, M. De Cian44, J. M. De Miranda1, L. De Paula2, M. De Serio14,j, P. De Simone19, C. T. Dean54, D. Decamp4, L. Del Buono8, B. Delaney50, H.-P. Dembinski11, M. Demmer10, A. Dendek31, D. Derkach38, O. Deschamps5, F. Desse7, F. Dettori55, B. Dey66, A. Di Canto43, P. Di Nezza19, S. Didenko71, H. Dijkstra43, F. Dordei43, M. Dorigo43,k, A. Dosil Suárez42, L. Douglas54, A. Dovbnya46, K. Dreimanis55, L. Dufour28, G. Dujany8, P. Durante43, J. M. Durham75, D. Dutta57, R. Dzhelyadin40, M. Dziewiecki12, A. Dziurda30, A. Dzyuba34, S. Easo52, U. Egede56, V. Egorychev35, S. Eidelman39,d, S. Eisenhardt53, U. Eitschberger10, R. Ekelhof10, L. Eklund54, S. Ely62, A. Ene33, S. Escher9, S. Esen28, T. Evans60, A. Falabella15, N. Farley48, S. Farry55, D. Fazzini21,43,b, L. Federici26, P. Fernandez Declara43, A. Fernandez Prieto42, F. Ferrari15, L. Ferreira Lopes44, F. Ferreira Rodrigues2, M. Ferro-Luzzi43, S. Filippov37, R. A. Fini14, M. Fiorini16,e, M. Firlej31, C. Fitzpatrick44, T. Fiutowski31, F. Fleuret7,a, M. Fontana23,43, F. Fontanelli20,h, R. Forty43, V. Franco Lima55, M. Frank43, C. Frei43, J. Fu22,l, W. Funk43, C. Färber43, M. Féo Pereira Rivello Carvalho28, E. Gabriel53, A. Gallas Torreira42, D. Galli15,g, S. Gallorini24, S. Gambetta53, Y. Gan3, M. Gandelman2, P. Gandini22, Y. Gao3, L. M. Garcia Martin73, B. Garcia Plana42, J. García Pardiñas45, J. Garra Tico50, L. Garrido41, D. Gascon41, C. Gaspar43, L. Gavardi10, G. Gazzoni5, D. Gerick12, E. Gersabeck57, M. Gersabeck57, T. Gershon51, D. Gerstel6, Ph. Ghez4, S. Gianì44, V. Gibson50, O. G. Girard44, L. Giubega33, K. Gizdov53, V. V. Gligorov8, D. Golubkov35, A. Golutvin56,71, A. Gomes1,m, I. V. Gorelov36, C. Gotti21,b, E. Govorkova28, J. P. Grabowski12, R. Graciani Diaz41, L. A. Granado Cardoso43, E. Graugés41, E. Graverini45, G. Graziani17, A. Grecu33, R. Greim28, P. Griffith23, L. Grillo57, L. Gruber43, B. R. Gruberg Cazon58, O. Grünberg68, C. Gu3, E. Gushchin37, Yu. Guz40,43, T. Gys43, C. Göbel63, T. Hadavizadeh58, C. Hadjivasiliou5, G. Haefeli44, C. Haen43, S. C. Haines50, B. Hamilton61, X. Han12, T. H. Hancock58, S. Hansmann-Menzemer12, N. Harnew58, S. T. Harnew49, T. Harrison55, C. Hasse43, M. Hatch43, J. He64, M. Hecker56, K. Heinicke10, A. Heister10, K. Hennessy55, L. Henry73, E. van Herwijnen43, M. Heß68, A. Hicheur2, R. Hidalgo Charman57, D. Hill58, M. Hilton57, P. H. Hopchev44, W. Hu66, W. Huang64, Z. C. Huard60, W. Hulsbergen28, T. Humair56, M. Hushchyn38, D. Hutchcroft55, D. Hynds28, P. Ibis10, M. Idzik31, P. Ilten48, K. Ivshin34, R. Jacobsson43, J. Jalocha58, E. Jans28, A. Jawahery61, F. Jiang3, M. John58, D. Johnson43, C. R. Jones50, C. Joram43, B. Jost43, N. Jurik58, S. Kandybei46, M. Karacson43, J. M. Kariuki49, S. Karodia54, N. Kazeev38, M. Kecke12, F. Keizer50, M. Kelsey62, M. Kenzie50, T. Ketel29, E. Khairullin38, B. Khanji43, C. Khurewathanakul44, K. E. Kim62, T. Kirn9, S. Klaver19, K. Klimaszewski32, T. Klimkovich11, S. Koliiev47, M. Kolpin12, R. Kopecna12, P. Koppenburg28, I. Kostiuk28, S. Kotriakhova34, M. Kozeiha5, L. Kravchuk37, M. Kreps51, F. Kress56, P. Krokovny39,d, W. Krupa31, W. Krzemien32, W. Kucewicz30,n, M. Kucharczyk30, V. Kudryavtsev39,d, A. K. Kuonen44, T. Kvaratskheliya35,43, D. Lacarrere43, G. Lafferty57, A. Lai23, D. Lancierini45, G. Lanfranchi19, C. Langenbruch9, T. Latham51, C. Lazzeroni48, R. Le Gac6, A. Leflat36, J. Lefrançois7, R. Lefèvre5, F. Lemaitre43, O. Leroy6, T. Lesiak30, B. Leverington12, P.-R. Li64, T. Li3, Z. Li62, X. Liang62, T. Likhomanenko70, R. Lindner43, F. Lionetto45, V. Lisovskyi7, X. Liu3, D. Loh51, A. Loi23, I. Longstaff54, J. H. Lopes2, G. H. Lovell50, C. Lucarelli18, D. Lucchesi24,o, M. Lucio Martinez42, A. Lupato24, E. Luppi16,e, O. Lupton43, A. Lusiani25, X. Lyu64, F. Machefert7, F. Maciuc33, V. Macko44, P. Mackowiak10, S. Maddrell-Mander49, O. Maev34,43, K. Maguire57, D. Maisuzenko34, M. W. Majewski31, S. Malde58, B. Malecki30, A. Malinin70, T. Maltsev39,d, G. Manca23,p, G. Mancinelli6, D. Marangotto22,l, J. Maratas5,q, J. F. Marchand4, U. Marconi15, S. Mariani18, C. Marin Benito7, M. Marinangeli44, P. Marino44, J. Marks12, P. J. Marshall55, G. Martellotti27, M. Martin6, M. Martinelli43, D. Martinez Santos42, F. Martinez Vidal73, A. Massafferri1, M. Materok9, R. Matev43, A. Mathad51, Z. Mathe43, C. Matteuzzi21, A. Mauri45, E. Maurice7,a, B. Maurin44, A. Mazurov48, M. McCann56,43, A. McNab57, R. McNulty13, J. V. Mead55, B. Meadows60, C. Meaux6, F. Meier10, N. Meinert68, D. Melnychuk32, M. Merk28, A. Merli22,l, E. Michielin24, D. A. Milanes67, E. Millard51, M.-N. Minard4, L. Minzoni16,e, D. S. Mitzel12, A. Mogini8, J. Molina Rodriguez1,r, T. Mombächer10, I. A. Monroy67, S. Monteil5, M. Morandin24, G. Morello19, M. J. Morello25,s, O. Morgunova70, J. Moron31, A. B. Morris6, R. Mountain62, F. Muheim53, M. Mulder28, C. H. Murphy58, D. Murray57, A. Mödden10, D. Müller43, J. Müller10, K. Müller45, V. Müller10, P. Naik49, T. Nakada44, R. Nandakumar52, A. Nandi58, T. Nanut44, I. Nasteva2, M. Needham53, N. Neri22, S. Neubert12, N. Neufeld43, M. Neuner12, R. Newcombe56, T. D. Nguyen44, C. Nguyen-Mau44,t, S. Nieswand9, R. Niet10, N. Nikitin36, A. Nogay70, N. S. Nolte43, D. P. O’Hanlon15, A. Oblakowska-Mucha31, V. Obraztsov40, S. Ogilvy19, R. Oldeman23,p, C. J. G. Onderwater69, A. Ossowska30, J. M. Otalora Goicochea2, P. Owen45, A. Oyanguren73, P. R. Pais44, T. Pajero25,s, A. Palano14, M. Palutan19,43, G. Panshin72, A. Papanestis52, M. Pappagallo53, L. L. Pappalardo16,e, W. Parker61, C. Parkes57, G. Passaleva17,43, A. Pastore14, M. Patel56, C. Patrignani15,g, A. Pearce43, A. Pellegrino28, G. Penso27, M. Pepe Altarelli43, S. Perazzini43, D. Pereima35, P. Perret5, L. Pescatore44, K. Petridis49, A. Petrolini20,h, A. Petrov70, S. Petrucci53, M. Petruzzo22,l, B. Pietrzyk4, G. Pietrzyk44, M. Pikies30, M. Pili58, D. Pinci27, J. Pinzino43, F. Pisani43, A. Piucci12, V. Placinta33, S. Playfer53, J. Plews48, M. Plo Casasus42, F. Polci8, M. Poli Lener19, A. Poluektov51, N. Polukhina71,u, I. Polyakov62, E. Polycarpo2, G. J. Pomery49, S. Ponce43, A. Popov40, D. Popov48,11, S. Poslavskii40, C. Potterat2, E. Price49, J. Prisciandaro42, C. Prouve49, V. Pugatch47, A. Puig Navarro45, H. Pullen58, G. Punzi25,i, W. Qian64, J. Qin64, R. Quagliani8, B. Quintana5, B. Rachwal31, J. H. Rademacker49, M. Rama25, M. Ramos Pernas42, M. S. Rangel2, F. Ratnikov38,v, G. Raven29, M. Ravonel Salzgeber43, M. Reboud4, F. Redi44, S. Reichert10, A. C. dos Reis1, F. Reiss8, C. Remon Alepuz73, Z. Ren3, V. Renaudin7, S. Ricciardi52, S. Richards49, K. Rinnert55, P. Robbe7, A. Robert8, A. B. Rodrigues44, E. Rodrigues60, J. A. Rodriguez Lopez67, M. Roehrken43, S. Roiser43, A. Rollings58, V. Romanovskiy40, A. Romero Vidal42, M. Rotondo19, M. S. Rudolph62, T. Ruf43, J. Ruiz Vidal73, J. J. Saborido Silva42, N. Sagidova34, B. Saitta23,p, V. Salustino Guimaraes63, C. Sanchez Gras28, C. Sanchez Mayordomo73, B. Sanmartin Sedes42, R. Santacesaria27, C. Santamarina Rios42, M. Santimaria19, E. Santovetti26,w, G. Sarpis57, A. Sarti19,x, C. Satriano27,y, A. Satta26, M. Saur64, D. Savrina35,36, S. Schael9, M. Schellenberg10, M. Schiller54, H. Schindler43, M. Schmelling11, T. Schmelzer10, B. Schmidt43, O. Schneider44, A. Schopper43, H. F. Schreiner60, M. Schubiger44, M. H. Schune7, R. Schwemmer43, B. Sciascia19, A. Sciubba27,x, A. Semennikov35, E. S. Sepulveda8, A. Sergi48,43, N. Serra45, J. Serrano6, L. Sestini24, A. Seuthe10, P. Seyfert43, M. Shapkin40, Y. Shcheglov34, T. Shears55, L. Shekhtman39,d, V. Shevchenko70, E. Shmanin71, B. G. Siddi16, R. Silva Coutinho45, L. Silva de Oliveira2, G. Simi24,o, S. Simone14,j, I. Skiba16, N. Skidmore12, T. Skwarnicki62, M. W. Slater48, J. G. Smeaton50, E. Smith9, I. T. Smith53, M. Smith56, M. Soares15, l. Soares Lavra1, M. D. Sokoloff60, F. J. P. Soler54, B. Souza De Paula2, B. Spaan10, E. Spadaro Norella22,l, P. Spradlin54, F. Stagni43, M. Stahl12, S. Stahl43, P. Stefko44, S. Stefkova56, O. Steinkamp45, S. Stemmle12, O. Stenyakin40, M. Stepanova34, H. Stevens10, A. Stocchi7, S. Stone62, B. Storaci45, S. Stracka25, M. E. Stramaglia44, M. Straticiuc33, U. Straumann45, S. Strokov72, J. Sun3, L. Sun65, K. Swientek31, T. Szumlak31, M. Szymanski64, S. T’Jampens4, Z. Tang3, A. Tayduganov6, T. Tekampe10, G. Tellarini16, F. Teubert43, E. Thomas43, J. van Tilburg28, M. J. Tilley56, V. Tisserand5, M. Tobin31, S. Tolk43, L. Tomassetti16,e, D. Tonelli25, D. Y. Tou8, R. Tourinho Jadallah Aoude1, E. Tournefier4, M. Traill54, M. T. Tran44, A. Trisovic50, A. Tsaregorodtsev6, G. Tuci25,i, A. Tully50, N. Tuning28,43, A. Ukleja32, A. Usachov7, A. Ustyuzhanin38, U. Uwer12, A. Vagner72, V. Vagnoni15, A. Valassi43, S. Valat43, G. Valenti15, R. Vazquez Gomez43, P. Vazquez Regueiro42, S. Vecchi16, M. van Veghel28, J. J. Velthuis49, M. Veltri17,z, G. Veneziano58, A. Venkateswaran62, T. A. Verlage9, M. Vernet5, M. Veronesi28, N. V. Veronika13, M. Vesterinen58, J. V. Viana Barbosa43, D. Vieira64, M. Vieites Diaz42, H. Viemann68, X. Vilasis-Cardona41,f, A. Vitkovskiy28, M. Vitti50, V. Volkov36, A. Vollhardt45, D. Vom Bruch8, B. Voneki43, A. Vorobyev34, V. Vorobyev39,d, J. A. de Vries28, C. Vázquez Sierra28, R. Waldi68, J. Walsh25, J. Wang62, M. Wang3, Y. Wang66, Z. Wang45, D. R. Ward50, H. M. Wark55, N. K. Watson48, D. Websdale56, A. Weiden45, C. Weisser59, M. Whitehead9, J. Wicht51, G. Wilkinson58, M. Wilkinson62, I. Williams50, M. R. J. Williams57, M. Williams59, T. Williams48, F. F. Wilson52,43, J. Wimberley61, M. Winn7, J. Wishahi10, W. Wislicki32, M. Witek30, G. Wormser7, S. A. Wotton50, K. Wyllie43, D. Xiao66, Y. Xie66, A. Xu3, M. Xu66, Q. Xu64, Z. Xu3, Z. Xu4, Z. Yang3, Z. Yang61, Y. Yao62, L. E. Yeomans55, H. Yin66, J. Yu66,aa, X. Yuan62, O. Yushchenko40, K. A. Zarebski48, M. Zavertyaev11,u, D. Zhang66, L. Zhang3, W. C. Zhang3,bb, Y. Zhang7, A. Zhelezov12, Y. Zheng64, X. Zhu3, V. Zhukov9,36, J. B. Zonneveld53, and S. Zucchelli15 (LHCb Collaboration)

  • 1Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil
  • 2Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
  • 3Center for High Energy Physics, Tsinghua University, Beijing, China
  • 4Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IN2P3-LAPP, Annecy, France
  • 5Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France
  • 6Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France
  • 7LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France
  • 8LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France
  • 9I. Physikalisches Institut, RWTH Aachen University, Aachen, Germany
  • 10Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany
  • 11Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany
  • 12Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
  • 13School of Physics, University College Dublin, Dublin, Ireland
  • 14INFN Sezione di Bari, Bari, Italy
  • 15INFN Sezione di Bologna, Bologna, Italy
  • 16INFN Sezione di Ferrara, Ferrara, Italy
  • 17INFN Sezione di Firenze, Firenze, Italy
  • 18Università di Firenze, Firenze, Italy
  • 19INFN Laboratori Nazionali di Frascati, Frascati, Italy
  • 20INFN Sezione di Genova, Genova, Italy
  • 21INFN Sezione di Milano-Bicocca, Milano, Italy
  • 22INFN Sezione di Milano, Milano, Italy
  • 23INFN Sezione di Cagliari, Monserrato, Italy
  • 24INFN Sezione di Padova, Padova, Italy
  • 25INFN Sezione di Pisa, Pisa, Italy
  • 26INFN Sezione di Roma Tor Vergata, Roma, Italy
  • 27INFN Sezione di Roma La Sapienza, Roma, Italy
  • 28Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands
  • 29Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, Netherlands
  • 30Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
  • 31AGH - University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland
  • 32National Center for Nuclear Research (NCBJ), Warsaw, Poland
  • 33Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
  • 34Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia
  • 35Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
  • 36Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia
  • 37Institute for Nuclear Research of the Russian Academy of Sciences (INR RAS), Moscow, Russia
  • 38Yandex School of Data Analysis, Moscow, Russia
  • 39Budker Institute of Nuclear Physics (SB RAS), Novosibirsk, Russia
  • 40Institute for High Energy Physics (IHEP), Protvino, Russia
  • 41ICCUB, Universitat de Barcelona, Barcelona, Spain
  • 42Instituto Galego de Física de Altas Enerxías (IGFAE), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
  • 43European Organization for Nuclear Research (CERN), Geneva, Switzerland
  • 44Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
  • 45Physik-Institut, Universität Zürich, Zürich, Switzerland
  • 46NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine
  • 47Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine
  • 48University of Birmingham, Birmingham, United Kingdom
  • 49H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom
  • 50Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom
  • 51Department of Physics, University of Warwick, Coventry, United Kingdom
  • 52STFC Rutherford Appleton Laboratory, Didcot, United Kingdom
  • 53School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom
  • 54School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom
  • 55Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom
  • 56Imperial College London, London, United Kingdom
  • 57School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
  • 58Department of Physics, University of Oxford, Oxford, United Kingdom
  • 59Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
  • 60University of Cincinnati, Cincinnati, Ohio, USA
  • 61University of Maryland, College Park, Maryland, USA
  • 62Syracuse University, Syracuse, New York, USA
  • 63Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil [associated with Institution Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil]
  • 64University of Chinese Academy of Sciences, Beijing, China (associated with Institution Center for High Energy Physics, Tsinghua University, Beijing, China)
  • 65School of Physics and Technology, Wuhan University, Wuhan, China (associated with Institution Center for High Energy Physics, Tsinghua University, Beijing, China)
  • 66Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China (associated with Institution Center for High Energy Physics, Tsinghua University, Beijing, China)
  • 67Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia (associated with Institution LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France)
  • 68Institut für Physik, Universität Rostock, Rostock, Germany (associated with Institution Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany)
  • 69Van Swinderen Institute, University of Groningen, Groningen, Netherlands (associated with Institution Nikhef National Institute for Subatomic Physics, Amsterdam, Netherlands)
  • 70National Research Centre Kurchatov Institute, Moscow, Russia [associated with Institution Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia]
  • 71National University of Science and Technology “MISIS”, Moscow, Russia [associated with Institution Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia]
  • 72National Research Tomsk Polytechnic University, Tomsk, Russia [associated with Institution Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia]
  • 73Instituto de Fisica Corpuscular, Centro Mixto Universidad de Valencia - CSIC, Valencia, Spain (associated with Institution ICCUB, Universitat de Barcelona, Barcelona, Spain)
  • 74University of Michigan, Ann Arbor, USA (associated with Institution Syracuse University, Syracuse, New York, USA)
  • 75Los Alamos National Laboratory (LANL), Los Alamos, USA (associated with Institution Syracuse University, Syracuse, New York, USA)

  • *Full author list given at the end of the article.
  • aAlso at Laboratoire Leprince-Ringuet, Palaiseau, France.
  • bAlso at Università di Milano Bicocca, Milano, Italy.
  • cAlso at Università di Modena e Reggio Emilia, Modena, Italy.
  • dAlso at Novosibirsk State University, Novosibirsk, Russia.
  • eAlso at Università di Ferrara, Ferrara, Italy.
  • fAlso at LIFAELS, La Salle, Universitat Ramon Llull, Barcelona, Spain.
  • gAlso at Università di Bologna, Bologna, Italy.
  • hAlso at Università di Genova, Genova, Italy.
  • iAlso at Università di Pisa, Pisa, Italy.
  • jAlso at Università di Bari, Bari, Italy.
  • kAlso at Sezione INFN di Trieste, Trieste, Italy.
  • lAlso at Università degli Studi di Milano, Milano, Italy.
  • mAlso at Universidade Federal do Triângulo Mineiro (UFTM), Uberaba-MG, Brazil.
  • nAlso at AGH - University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, Kraków, Poland.
  • oAlso at Università di Padova, Padova, Italy.
  • pAlso at Università di Cagliari, Cagliari, Italy.
  • qAlso at MSU - Iligan Institute of Technology (MSU-IIT), Iligan, Philippines.
  • rAlso at Escuela Agrícola Panamericana, San Antonio de Oriente, Honduras.
  • sAlso at Scuola Normale Superiore, Pisa, Italy.
  • tAlso at Hanoi University of Science, Hanoi, Vietnam.
  • uAlso at P.N. Lebedev Physical Institute, Russian Academy of Science (LPI RAS), Moscow, Russia.
  • vAlso at National Research University Higher School of Economics, Moscow, Russia.
  • wAlso at Università di Roma Tor Vergata, Roma, Italy.
  • xAlso at Università di Roma La Sapienza, Roma, Italy.
  • yAlso at Università della Basilicata, Potenza, Italy.
  • zAlso at Università di Urbino, Urbino, Italy.
  • aaAlso at Physics and Micro Electronic College, Hunan University, Changsha City, China.
  • bbAlso at School of Physics and Information Technology, Shaanxi Normal University (SNNU), Xi’an, China.

Phys. Rev. Lett. 121, 222001 – Published 29 November, 2018

DOI: https://doi.org/10.1103/PhysRevLett.121.222001

Abstract

The cross section for prompt antiproton production in collisions of protons with an energy of 6.5 TeV incident on helium nuclei at rest is measured with the LHCb experiment from a data set corresponding to an integrated luminosity of 0.5nb1. The target is provided by injecting helium gas into the LHC beam line at the LHCb interaction point. The reported results, covering antiproton momenta between 12 and 110GeV/c, represent the first direct determination of the antiproton production cross section in pHe collisions, and impact the interpretation of recent results on antiproton cosmic rays from space-borne experiments.

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