- Physical Review Journals
All JournalsPhysics Magazine

Physical Review D

Reuse & Permissions

It is not necessary to obtain permission to reuse this article or its components as it is available under the terms of the Creative Commons Attribution 4.0 International license. This license permits unrestricted use, distribution, and reproduction in any medium, provided attribution to the author(s) and the published article's title, journal citation, and DOI are maintained. Please note that some figures may have been included with permission from other third parties. It is your responsibility to obtain the proper permission from the rights holder directly for these figures.

Export citation

Export citation

Choose format for download:

Download Citation
  • Letter
  • Open Access

Measurement of the B0 lifetime and flavor-oscillation frequency using hadronic decays reconstructed in 2019–2021 Belle II data

F. Abudinén, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner et al. (The Belle II Collaboration)

D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, J. Baudot, M. Bauer, A. Baur, A. Beaubien, J. Becker, J. V. Bennett, E. Bernieri, F. U. Bernlochner, V. Bertacchi, M. Bertemes, E. Bertholet, M. Bessner, S. Bettarini, V. Bhardwaj, B. Bhuyan, F. Bianchi, T. Bilka, S. Bilokin, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, M. Bračko, R. A. Briere, T. E. Browder, A. Budano, S. Bussino, M. Campajola, L. Cao, G. Casarosa, C. Cecchi, J. Cerasoli, P. Chang, P. Cheema, V. Chekelian, C. Chen, B. G. Cheon, K. Chilikin, K. Chirapatpimol, H.-E. Cho, K. Cho, S.-J. Cho, S.-K. Choi, S. Choudhury, J. Cochran, L. Corona, S. Cunliffe, F. Dattola, E. De La Cruz-Burelo, S. A. De La Motte, G. de Marino, G. De Nardo, M. De Nuccio, G. De Pietro, R. de Sangro, M. Destefanis, A. De Yta-Hernandez, R. Dhamija, A. Di Canto, F. Di Capua, J. Dingfelder, Z. Doležal, I. Domínguez Jiménez, T. V. Dong, M. Dorigo, K. Dort, D. Dossett, S. Dreyer, S. Dubey, G. Dujany, P. Ecker, M. Eliachevitch, D. Epifanov, P. Feichtinger, T. Ferber, D. Ferlewicz, T. Fillinger, G. Finocchiaro, A. Fodor, F. Forti, A. Frey, B. G. Fulsom, A. Gabrielli, E. Ganiev, M. Garcia-Hernandez, G. Gaudino, V. Gaur, A. Gaz, A. Gellrich, G. Ghevondyan, D. Ghosh, G. Giakoustidis, R. Giordano, A. Giri, A. Glazov, B. Gobbo, R. Godang, P. Goldenzweig, W. Gradl, T. Grammatico, S. Granderath, E. Graziani, D. Greenwald, Z. Gruberová, T. Gu, K. Gudkova, S. Halder, K. Hara, T. Hara, K. Hayasaka, H. Hayashii, S. Hazra, C. Hearty, M. T. Hedges, I. Heredia de la Cruz, M. Hernández Villanueva, A. Hershenhorn, T. Higuchi, E. C. Hill, M. Hohmann, C.-L. Hsu, T. Humair, T. Iijima, K. Inami, N. Ipsita, A. Ishikawa, S. Ito, R. Itoh, M. Iwasaki, W. W. Jacobs, D. E. Jaffe, E.-J. Jang, Q. P. Ji, S. Jia, Y. Jin, H. Junkerkalefeld, M. Kaleta, A. B. Kaliyar, K. H. Kang, G. Karyan, T. Kawasaki, C. Kiesling, C.-H. Kim, D. Y. Kim, K.-H. Kim, Y.-K. Kim, H. Kindo, P. Kodyš, T. Koga, S. Kohani, K. Kojima, A. Korobov, S. Korpar, E. Kovalenko, R. Kowalewski, P. Križan, P. Krokovny, T. Kuhr, J. Kumar, R. Kumar, K. Kumara, T. Kunigo, A. Kuzmin, Y.-J. Kwon, S. Lacaprara, J. S. Lange, M. Laurenza, R. Leboucher, F. R. Le Diberder, P. Leitl, D. Levit, P. M. Lewis, L. K. Li, J. Libby, Z. Liptak, Q. Y. Liu, Z. Q. Liu, D. Liventsev, S. Longo, T. Lueck, C. Lyu, Y. Ma, M. Maggiora, S. P. Maharana, R. Maiti, S. Maity, R. Manfredi, E. Manoni, A. C. Manthei, M. Mantovano, D. Marcantonio, S. Marcello, C. Marinas, L. Martel, C. Martellini, A. Martini, T. Martinov, L. Massaccesi, M. Masuda, K. Matsuoka, D. Matvienko, S. K. Maurya, J. A. McKenna, F. Meier, M. Merola, F. Metzner, M. Milesi, C. Miller, K. Miyabayashi, H. Miyake, R. Mizuk, G. B. Mohanty, N. Molina-Gonzalez, S. Moneta, H.-G. Moser, M. Mrvar, R. Mussa, I. Nakamura, K. R. Nakamura, M. Nakao, Y. Nakazawa, A. Narimani Charan, M. Naruki, D. Narwal, A. Natochii, L. Nayak, G. Nazaryan, C. Niebuhr, N. K. Nisar, S. Nishida, S. Ogawa, H. Ono, Y. Onuki, P. Oskin, P. Pakhlov, G. Pakhlova, A. Paladino, A. Panta, S. Pardi, K. Parham, J. Park, S.-H. Park, B. Paschen, A. Passeri, S. Patra, S. Paul, T. K. Pedlar, I. Peruzzi, R. Peschke, R. Pestotnik, F. Pham, L. E. Piilonen, G. Pinna Angioni, P. L. M. Podesta-Lerma, T. Podobnik, S. Pokharel, L. Polat, C. Praz, S. Prell, E. Prencipe, M. T. Prim, H. Purwar, N. Rad, P. Rados, G. Raeuber, S. Raiz, M. Reif, S. Reiter, I. Ripp-Baudot, G. Rizzo, L. B. Rizzuto, J. M. Roney, A. Rostomyan, N. Rout, Y. Sakai, D. A. Sanders, S. Sandilya, A. Sangal, L. Santelj, Y. Sato, B. Scavino, C. Schmitt, C. Schwanda, A. J. Schwartz, Y. Seino, A. Selce, K. Senyo, J. Serrano, M. E. Sevior, C. Sfienti, W. Shan, C. Sharma, C. P. Shen, T. Shillington, J.-G. Shiu, D. Shtol, F. Simon, J. B. Singh, J. Skorupa, R. J. Sobie, A. Soffer, E. Solovieva, S. Spataro, B. Spruck, M. Starič, S. Stefkova, R. Stroili, Y. Sue, M. Sumihama, W. Sutcliffe, S. Y. Suzuki, H. Svidras, M. Takahashi, M. Takizawa, U. Tamponi, S. Tanaka, K. Tanida, H. Tanigawa, N. Taniguchi, F. Tenchini, R. Tiwary, D. Tonelli, E. Torassa, K. Trabelsi, I. Tsaklidis, M. Uchida, I. Ueda, Y. Uematsu, T. Uglov, K. Unger, Y. Unno, K. Uno, S. Uno, P. Urquijo, Y. Ushiroda, S. E. Vahsen, R. van Tonder, G. S. Varner, K. E. Varvell, A. Vinokurova, V. S. Vismaya, L. Vitale, V. Vobbilisetti, A. Vossen, M. Wakai, H. M. Wakeling, S. Wallner, E. Wang, M.-Z. Wang, X. L. Wang, Z. Wang, A. Warburton, M. Watanabe, S. Watanuki, M. Welsch, C. Wessel, E. Won, X. P. Xu, B. D. Yabsley, S. Yamada, W. Yan, S. B. Yang, H. Ye, J. Yelton, J. H. Yin, Y. M. Yook, K. Yoshihara, Y. Yusa, L. Zani, Y. Zhai, Y. Zhang, V. Zhilich, Q. D. Zhou, X. Y. Zhou, V. I. Zhukova, and R. Žlebčík (The Belle II Collaboration)

PDF

Phys. Rev. D 107, L091102 – Published 15 May, 2023

DOI: https://doi.org/10.1103/PhysRevD.107.L091102

Abstract

We measure the B0 lifetime and flavor-oscillation frequency using B0→D(*)−π+ decays collected by the Belle II experiment in asymmetric-energy e+e− collisions produced by the SuperKEKB collider operating at the ϒ(4S) resonance. We fit the decay-time distribution of signal decays, where the initial flavor is determined by identifying the flavor of the other B meson in the event. The results, based on 33000 signal decays reconstructed in a data sample corresponding to 190  fb−1, are τB0=(1.499±0.013±0.008)  ps, Δmd=(0.516±0.008±0.005)  ps−1, where the first uncertainties are statistical and the second are systematic. These results are consistent with the world-average values.

View figure in article

Physics Subject Headings (PhySH)

Article Text

References (48)

  1. A. Lenz, Int. J. Mod. Phys. A 30, 1543005 (2015).
  2. R. J. Dowdall, C. T. H. Davies, R. R. Horgan, G. P. Lepage, C. J. Monahan, J. Shigemitsu, and M. Wingate, Phys. Rev. D 100, 094508 (2019).
  3. K. Abe et al. (Belle Collaboration), Phys. Rev. D 71, 072003 (2005).
  4. B. Aubert et al. (BABAR Collaboration), Phys. Rev. D 73, 012004 (2006).
  5. R. Aaij et al. (LHCb Collaboration), J. High Energy Phys. 04 (2014) 114.
  6. R. Aaij et al. (LHCb Collaboration), Eur. Phys. J. C 76, 412 (2016).
  7. A. M. Sirunyan et al. (CMS Collaboration), Eur. Phys. J. C 78, 457 (2018).
  8. G. Aad et al. (ATLAS Collaboration), Phys. Rev. D 87, 032002 (2013).
  9. V. M. Abazov et al. (D0 Collaboration), Phys. Rev. Lett. 114, 062001 (2015).
  10. T. Aaltonen et al. (CDF Collaboration), Phys. Rev. Lett. 106, 121804 (2011).

  11. We use a system of units in which ℏ=c=1 and mass and frequency have the same dimension.

  12. Another naming convention, with β≡ϕ1 and α≡ϕ2, is also used in the literature.

  13. I. Adachi et al. (Belle Collaboration), Phys. Rev. Lett. 108, 171802 (2012).
  14. P. Vanhoefer et al. (Belle Collaboration), Phys. Rev. D 93, 032010 (2016); 94, 099903(A) (2016).
  15. M. Beneke, G. Buchalla, M. Neubert, and C. T. Sachrajda, Nucl. Phys. B591, 313 (2000).
  16. R. Aaij et al. (LHCb Collaboration), J. High Energy Phys. 06 (2018) 084.
  17. B. Aubert et al. (BABAR Collaboration), Phys. Rev. D 73, 111101 (2006).
  18. S. Bahinipati et al. (Belle Collaboration), Phys. Rev. D 84, 021101 (2011).
  19. F. Abudinén et al. (Belle II Collaboration), Eur. Phys. J. C 82, 283 (2022).
  20. I. I. Y. Bigi and A. I. Sanda, Nucl. Phys. B193, 85 (1981).
  21. P. Oddone, eConf C870126, 423 (1987).
  22. K. Akai, K. Furukawa, and H. Koiso (SuperKEKB Collaboration), Nucl. Instrum. Methods Phys. Res., Sect. A 907, 188 (2018).
  23. T. Abe et al. (Belle II Collaboration), arXiv:1011.0352.
  24. T. Kuhr, C. Pulvermacher, M. Ritter, T. Hauth, and N. Braun (Belle II Framework Software Group), Comput. Software Big Sci. 3, 1 (2019).
  25. Belle II collaboration, Belle II Analysis Software Framework (basf2), 10.5281/zenodo.5574115.
  26. V. Bertacchi et al. (Belle II Tracking Group), Comput. Phys. Commun. 259, 107610 (2021).
  27. T. Sjöstrand, S. Ask, J. R. Christiansen, R. Corke, N. Desai, P. Ilten, S. Mrenna, S. Prestel, C. O. Rasmussen, and P. Z. Skands, Comput. Phys. Commun. 191, 159 (2015).
  28. D. J. Lange, Nucl. Instrum. Methods Phys. Res., Sect. A 462, 152 (2001).
  29. S. Jadach, B. F. L. Ward, and Z. Was, Comput. Phys. Commun. 130, 260 (2000).
  30. S. Agostinelli et al. (GEANT4 Software Group), Nucl. Instrum. Methods Phys. Res., Sect. A 506, 250 (2003).
  31. Z. J. Liptak et al., Nucl. Instrum. Methods Phys. Res., Sect. A 1040, 167168 (2022).
  32. W. Hulsbergen, Nucl. Instrum. Methods Phys. Res., Sect. A 600, 471 (2009).
  33. J. F. Krohn et al. (Belle II Analysis Software Group), Nucl. Instrum. Methods Phys. Res., Sect. A 976, 164269 (2020).
  34. W. Waltenberger, W. Mitaroff, F. Moser, B. Pflugfelder, and H. V. Riedel, J. Phys. Conf. Ser. 119, 032037 (2008).
  35. S. Dey and A. Soffer, Springer Proc. Phys. 248, 411 (2020).
  36. T. Chen and C. Guestrin, in Proceedings of the 22nd ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, KDD ’16 (Association for Computing Machinery, New York, NY, USA, 2016) p. 785794.
  37. G. C. Fox and S. Wolfram, Phys. Rev. Lett. 41, 1581 (1978).
  38. S. H. Lee et al. (Belle Collaboration), Phys. Rev. Lett. 91, 261801 (2003).
  39. D. M. Asner et al. (CLEO Collaboration), Phys. Rev. D 53, 1039 (1996).
  40. A. J. Bevan, B. Golob, Th. Mannel, S. Prell, and B. D. Yabsley, Eur. Phys. J. C 74, 3026 (2014).
  41. G. Parisi, Phys. Lett. 74B, 65 (1978).
  42. T. Skwarnicki, A study of the radiative CASCADE transitions between the upsilon-prime and upsilon resonances, Ph.D. thesis, INP, Cracow, 1986.
  43. N. L. Johnson, Biometrika 36, 149 (1949).
  44. M. Pivk and F. R. Le Diberder, Nucl. Instrum. Methods Phys. Res., Sect. A 555, 356 (2005).
  45. H. Dembinski, M. Kenzie, C. Langenbruch, and M. Schmelling, Nucl. Instrum. Methods Phys. Res., Sect. A 1040, 167270 (2022).
  46. B. Efron, Ann. Stat. 7, 1 (1979).
  47. T. Bilka, J. Kandra, C. Kleinwort, and R. Zlebcik, EPJ Web Conf. 251, 03028 (2021).
  48. R. L. Workman et al. (Particle Data Group), Prog. Theor. Exp. Phys. 2022, 083C01 (2022).

Outline

Information

Phys. Rev. D 107, L091102– Published 15 May, 2023
  • Received 27 February 2023
  • Accepted 18 April 2023
Crossmark - Check for updates button
Creative Commons Logo

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.

Published by the American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation