Measurement of the time-integrated CP asymmetry in Dn 0 → Kn n Sn 0n n Kn n Sn 0n decays

摘要

The time-integrated CP asymmetry in the decay D 0 → K S 0 K S 0 is measured using 3 fb−1 of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The flavour of the D 0 meson is determined by use of the decay D *+ → D 0 π + and its charge conjugate mode. The result is $$ {mathcal{A}}_{CP}=-0.029pm 0.052pm 0.022, $$ where the first uncertainty is statistical and the second systematic. The result is consistent with Standard Model expectations and improves the uncertainty with respect to the only previous measurement of this quantity by more than a factor of three. Keywords CP violation Charm physics Flavor physics Hadron-Hadron Scattering ArXiv ePrint: 1508.​06087 Deceased (T. M. 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Journal Journal of High Energy Physics 2015:55 Online DateOctober 2015 DOI 10.1007/JHEP10(2015)055 Online ISSN 1029-8479 Publisher Springer Berlin Heidelberg Additional Links Register for Journal Updates Editorial Board About This Journal Manuscript Submission Topics Elementary Particles, Quantum Field Theory Quantum Field Theories, String Theory Classical and Quantum Gravitation, Relativity Theory Quantum Physics Keywords CP violation Charm physics Flavor physics Hadron-Hadron Scattering Industry Sectors Electronics IT & Software Telecommunications Authors R. Aaij (38) B. Adeva (37) M. Adinolfi (46) A. Affolder (52) Z. Ajaltouni (5) S. Akar (6) J. Albrecht (9) F. Alessio (38) M. Alexander (51) S. Ali (41) G. Alkhazov (30) P. Alvarez Cartelle (53) A. A. Alves Jr (57) S. Amato (2) S. Amerio (22) Y. Amhis (7) L. An (3) L. Anderlini (17) J. Anderson (40) G. Andreassi (39) M. Andreotti (16) (73) J. E. Andrews (58) R. B. Appleby (54) O. Aquines Gutierrez (10) F. 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Ukleja (28) A. Ustyuzhanin (64) (65) U. Uwer (11) C. Vacca (15) (72) V. Vagnoni (14) G. Valenti (14) A. Vallier (7) R. Vazquez Gomez (18) P. Vazquez Regueiro (37) C. Vázquez Sierra (37) S. Vecchi (16) J. J. Velthuis (46) M. Veltri (17) (74) G. Veneziano (39) M. Vesterinen (11) B. Viaud (7) D. Vieira (2) M. Vieites Diaz (37) X. Vilasis-Cardona (36) (82) V. Volkov (32) A. Vollhardt (40) D. Volyanskyy (10) D. Voong (46) A. Vorobyev (30) V. Vorobyev (34) C. Voß (63) J. A. de Vries (41) R. Waldi (63) C. Wallace (48) R. Wallace (12) J. Walsh (23) S. Wandernoth (11) J. Wang (59) D. R. Ward (47) N. K. Watson (45) D. Websdale (53) A. Weiden (40) M. Whitehead (48) G. Wilkinson (38) (55) M. Wilkinson (59) M. Williams (38) M. P. Williams (45) M. Williams (56) T. Williams (45) F. F. Wilson (49) J. Wimberley (58) J. Wishahi (9) W. Wislicki (28) M. Witek (26) G. Wormser (7) S. A. Wotton (47) S. Wright (47) K. Wyllie (38) Y. Xie (61) Z. Xu (39) Z. Yang (3) J. Yu (61) X. Yuan (34) O. Yushchenko (35) M. Zangoli (14) M. Zavertyaev (10) (69) L. Zhang (3) Y. Zhang (3) A. Zhelezov (11) A. Zhokhov (31) L. Zhong (3) S. Zucchelli (14) The LHCb collaboration Author Affiliations 38. European Organization for Nuclear Research (CERN), Geneva, Switzerland 37. Universidad de Santiago de Compostela, Santiago de Compostela, Spain 46. H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom 52. Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom 5. Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France 6. CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France 9. Fakultät Physik, Technische Universität Dortmund, Dortmund, Germany 51. School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom 41. Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands 30. Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia 53. Imperial College London, London, United Kingdom 57. University of Cincinnati, Cincinnati, OH, United States 2. Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil 22. Sezione INFN di Padova, Padova, Italy 7. LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France 3. Center for High Energy Physics, Tsinghua University, Beijing, China 17. Sezione INFN di Firenze, Firenze, Italy 40. Physik-Institut, Universität Zürich, Zürich, Switzerland 39. Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland 16. Sezione INFN di Ferrara, Ferrara, Italy 73. Università di Ferrara, Ferrara, Italy 58. University of Maryland, College Park, MD, United States 54. School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom 10. Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany 11. Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany 35. Institute for High Energy Physics (IHEP), Protvino, Russia 59. Syracuse University, Syracuse, NY, United States 25. Sezione INFN di Roma La Sapienza, Roma, Italy 80. Università della Basilicata, Potenza, Italy 48. Department of Physics, University of Warwick, Coventry, United Kingdom 36. Universitat de Barcelona, Barcelona, Spain 60. Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil, associated to 2 28. National Center for Nuclear Research (NCBJ), Warsaw, Poland 4. LAPP, Université Savoie Mont-Blanc, CNRS/IN2P3, Annecy-Le-Vieux, France 23. Sezione INFN di Pisa, Pisa, Italy 1. Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil 20. Sezione INFN di Milano Bicocca, Milano, Italy 31. Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia 8. LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France 18. Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy 32. Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia 45. University of Birmingham, Birmingham, United Kingdom 75. Università di Modena e Reggio Emilia, Modena, Italy 34. Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia 15. Sezione INFN di Cagliari, Cagliari, Italy 77. Università di Milano Bicocca, Milano, Italy 82. LIFAELS, La Salle, Universitat Ramon Llull, Barcelona, Spain 14. Sezione INFN di Bologna, Bologna, Italy 71. Università di Bologna, Bologna, Italy 24. Sezione INFN di Roma Tor Vergata, Roma, Italy 78. Università di Roma Tor Vergata, Roma, Italy 19. Sezione INFN di Genova, Genova, Italy 76. Università di Genova, Genova, Italy 50. School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom 86. Scuola Normale Superiore, Pisa, Italy 55. Department of Physics, University of Oxford, Oxford, United Kingdom 47. Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom 72. Università di Cagliari, Cagliari, Italy 29. Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania 21. Sezione INFN di Milano, Milano, Italy 43. NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine 26. Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland 49. STFC Rutherford Appleton Laboratory, Didcot, United Kingdom 33. Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia 27. AGH - University of Science and Technology, Faculty of Physics and Applied Computer Science, Kraków, Poland 68. Universidade Federal do Triângulo Mineiro (UFTM), Uberaba-MG, Brazil 63. Institut für Physik, Universität Rostock, Rostock, Germany, associated to 11 56. Massachusetts Institute of Technology, Cambridge, MA, United States 42. Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands 81. AGH - University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, Kraków, Poland 64. National Research Centre Kurchatov Institute, Moscow, Russia, associated to 31 65. Yandex School of Data Analysis, Moscow, Russia, associated to 31 84. Università di Padova, Padova, Italy 66. Instituto de Fisica Corpuscular (IFIC), Universitat de Valencia-CSIC, Valencia, Spain, associated to 36 12. School of Physics, University College Dublin, Dublin, Ireland 62. Departamento de Fisica, Universidad Nacional de Colombia, Bogota, Colombia, associated to 8 83. Hanoi University of Science, Hanoi, Viet Nam 44. Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine 67. Van Swinderen Institute, University of Groningen, Groningen, The Netherlands, associated to 41 13. Sezione INFN di Bari, Bari, Italy 70. Università di Bari, Bari, Italy 87. Università degli Studi di Milano, Milano, Italy 79. Università di Roma La Sapienza, Roma, Italy 85. Università di Pisa, Pisa, Italy 74. Università di Urbino, Urbino, Italy 61. Institute of Particle Physics, Central China Normal University, Wuhan, Hubei, China, associated to 3 69. P.N. Lebedev Physical Institute, Russian Academy of Science (LPI RAS), Moscow, Russia Continue reading... To view the rest of this content please follow the download PDF link above