Measurement of the isospin asymmetry in B?→?K(*)μ+μ?/sup> decays

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• 作者：The LHCb collaboration
  R. Aaij (38)
  C. Abellan Beteta (3369)
  A. Adametz (11)
  B. Adeva (34)
  M. Adinolfi (43)
  C. Adrover (6)
  A. Affolder (49)
  Z. Ajaltouni (5)
  J. Albrecht (35)
  F. Alessio (35)
  M. Alexander (48)
  S. Ali (38)
  G. Alkhazov (27)
  P. Alvarez Cartelle (34)
  A. A. Alves Jr (22)
  S. Amato (2)
  Y. Amhis (36)
  J. Anderson (37)
  R. B. Appleby (51)
  O. Aquines Gutierrez (10)
  F. Archilli (1835)
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  M. Artuso (5335)
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• 关键词：Keywords Hadron ; Hadron Scattering
• 刊名：Journal of High Energy Physics
• 出版年：2012
• 出版时间：July 2012
• 年：2012
• 卷：2012
• 期：7
• 全文大小：776.9 KB
• 参考文献：1. T. Feldmann and J. Matias, Forward backward and isospin asymmetry for B?→?K (?)?+?? decay in the standard model and in supersymmetry, JHEP 01 (2003) 074 [
  2. BABAR collaboration, B. Aubert et al., Direct CP, lepton flavor and isospin asymmetries in the decays B → K (?) ? + ? ? , Phys. Rev. Lett. 102 (2009) 091803 [
  3. BELLE collaboration, J.-T. Wei et al., Measurement of the differential branching fraction and forward-backword asymmetry for B → K (?)?+??, Phys. Rev. Lett. 103 (2009) 171801 [
  4. Heavy Flavor Averaging Group collaboration, D. Asner et al., Averages of b-hadron, c-hadron and τ -lepton properties, arXiv:1010.1589 [INSPIRE].
  5. LHCb collaboration, A.A. Alves Jr. et al., The LHCb detector at the LHC, 2008 JINST 3 S08005 [INSPIRE].
  6. V. Gligorov, C. Thomas and M. Williams, The HLT inclusive B triggers, LHCb-PUB-2011-016 (2011).
  7. T. Sj?strand, S. Mrenna and P. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [
  8. I. Belyaev et al., Handling of the generation of primary events in Gauss, the LHCb simulation framework, Nucl. Sci. Cymp. Conf. Rec. (2010) 1155.
  9. D.J. Lange, The EvtGen particle decay simulation package, Nucl. Instrum. Meth. A 462 (2001)152 [INSPIRE].
  10. P. Golonka and Z. Was, PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays, Eur. Phys. J. C 45 (2006) 97 [
  11. A. Ali, P. Ball, L. Handoko and G. Hiller, A comparative study of the decays B?→?(K, K ?)?+?? in standard model and supersymmetric theories, Phys. Rev. D 61 (2000) 074024 [hep-ph/9910221] [INSPIRE].
  12. GEANT4 collaboration, J. Allison et al., GEANT4 developments and applications, IEEE Trans. Nucl. Sci. 53 (2006) 270.
  13. GEANT4 collaboration, S. Agostinelli et al., GEANT4: a simulation toolkit, Nucl. Instrum. Meth. A 506 (2003) 250 [INSPIRE].
  14. M. Clemencic et al., The LHCb simulation application, Gauss: design, evolution and experience, J. Phys. Conf. Ser. 331 (2011) 032023
  15. P. Speckmayer, A. H?cker, J. Stelzer and H. Voss, The toolkit for multivariate data analysis TMVA4, J. Phys. Conf. Ser. 219 (2010) 032057.
  16. LHCb collaboration, R. Aaij et al., Differential branching fraction and angular analysis of the decay B 0 → K ?0 μ + μ ?, Phys. Rev. Lett. 108 (2012) 181806 [
  17. T. Skwarnicki, A study of the radiative cascade transitions between the Υ′ and Upsilon resonances, Ph.D. thesis, Institute of Nuclear Physics, Krakow, Poland (1986) [DESY-F31-86-02].
  18. P. Koppenburg, Selection of B +?→?llK at LHCb and sensitivity to R K , LHCb-2007-034 (2007).
  19. K.G. Wilson, Nonlagrangian models of current algebra, Phys. Rev. 179 (1969) 1499 [
  20. K. Wilson and W. Zimmermann, Operator product expansions and composite field operators in the general framework of quantum field theory, Commun. Math. Phys. 24 (1972) 87 [
  21. D. Melikhov and B. Stech, Weak form-factors for heavy meson decays: an update, Phys. Rev. D 62 (2000) 014006 [hep-ph/0001113] [INSPIRE].
  22. Particle Data Group collaboration, K. Nakamura et al., Review of particle physics, J. Phys. G 37 (2010) 075021 [INSPIRE].
  23. C. Bobeth, G. Hiller and D. van Dyk, More benefits of semileptonic rare B decays at low recoil: CP-violation, JHEP 07 (2011) 067 [
  24. C. Bobeth, G. Hiller, D. van Dyk and C. Wacker, The decay B?→?Kl + l ? at low hadronic recoil and model-independent ΔB?=?1 constraints, JHEP 01 (2012) 107 [
  25. C. Bobeth, G. Hiller and D. van Dyk, private communication.
  26. M. Beneke, T. Feldmann and D. Seidel, Systematic approach to exclusive B?→?V ?+?? , V γ decays, Nucl. Phys. B 612 (2001) 25 [
  27. M. Beneke, T. Feldmann and D. Seidel, Exclusive radiative and electroweak b?→?d and b?→?s penguin decays at NLO, Eur. Phys. J. C 41 (2005) 173 [
  28. C. Bobeth, G. Hiller and G. Piranishvili, Angular distributions of B?→?Kll decays,JHEP 12 (2007)040 [
  29. B. Grinstein and D. Pirjol, Exclusive rare B?→?K ??+?? — Decays at low recoil: controlling the long-distance effects, Phys. Rev. D 70 (2004) 114005 [hep-ph/0404250] [INSPIRE].
  30. P. Ball and R. Zwicky, B(D, S)?→?ρ, ω, K ? , φ decay form-factors from light-cone sum rules revisited, Phys. Rev. D 71 (2005) 014029 [hep-ph/0412079] [INSPIRE].
  31. A. Khodjamirian, T. Mannel, A. Pivovarov and Y.-M. Wang, Charm-loop effect in B?→?K (?)?+?? and B?→?K ?γ, JHEP 09 (2010)089 [
  32. U. Egede, T. Hurth, J. Matias, M. Ramon and W. Reece, New observables in the decay mode Bd?→?K?0??+???, JHEP 11(2008)032 [
  33. BABAR collaboration, Measurement of branching fractions and rate asymmetries in the rare decays B → K (?) l + l ?, submitted to Phys. Rev. D [arXiv:1204.3933] [INSPIRE].
  34. CDF collaboration, T. Aaltonen et al., Observation of the baryonic flavor-changing neutral current decay Λb → Λμ + μ ?, Phys. Rev. Lett. 107 (2011) 201802 [
• 作者单位：1. Centro Brasileiro de Pesquisas Físicas (CBPF), Rio de Janeiro, Brazil2. Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil3. Center for High Energy Physics, Tsinghua University, Beijing, China4. LAPP, Université de Savoie, CNRS/IN2P3, Annecy-Le-Vieux, France5. Clermont Université, Université Blaise Pascal, CNRS/IN2P3, LPC, Clermont-Ferrand, France6. CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France7. LAL, Université Paris-Sud, CNRS/IN2P3, Orsay, France8. LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France9. Fakult?t Physik, Technische Universit?t Dortmund, Dortmund, Germany10. Max-Planck-Institut für Kernphysik (MPIK), Heidelberg, Germany11. Physikalisches Institut, Ruprecht-Karls-Universit?t Heidelberg, Heidelberg, Germany12. School of Physics, University College Dublin, Dublin, Ireland13. Sezione INFN di Bari, Bari, Italy14. Sezione INFN di Bologna, Bologna, Italy15. Sezione INFN di Cagliari, Cagliari, Italy16. Sezione INFN di Ferrara, Ferrara, Italy17. Sezione INFN di Firenze, Firenze, Italy18. Laboratori Nazionali dell’INFN di Frascati, Frascati, Italy19. Sezione INFN di Genova, Genova, Italy20. Sezione INFN di Milano Bicocca, Milano, Italy21. Sezione INFN di Roma Tor Vergata, Roma, Italy22. Sezione INFN di Roma La Sapienza, Roma, Italy23. Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland24. AGH University of Science and Technology, Kraków, Poland25. Soltan Institute for Nuclear Studies, Warsaw, Poland26. Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania27. Petersburg Nuclear Physics Institute (PNPI), Gatchina, Russia28. Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia29. Institute of Nuclear Physics, Moscow State University (SINP MSU), Moscow, Russia30. Institute for Nuclear Research of the Russian Academy of Sciences (INR RAN), Moscow, Russia31. Budker Institute of Nuclear Physics (SB RAS) and Novosibirsk State University, Novosibirsk, Russia32. Institute for High Energy Physics (IHEP), Protvino, Russia33. Universitat de Barcelona, Barcelona, Spain34. Universidad de Santiago de Compostela, Santiago de Compostela, Spain35. European Organization for Nuclear Research (CERN), Geneva, Switzerland36. Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland37. Physik-Institut, Universit?t Zürich, Zürich, Switzerland38. Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands39. Nikhef National Institute for Subatomic Physics and VU University Amsterdam, Amsterdam, The Netherlands40. NSC Kharkiv Institute of Physics and Technology (NSC KIPT), Kharkiv, Ukraine41. Institute for Nuclear Research of the National Academy of Sciences (KINR), Kyiv, Ukraine42. University of Birmingham, Birmingham, United Kingdom43. H.H. Wills Physics Laboratory, University of Bristol, Bristol, United Kingdom44. Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom45. Department of Physics, University of Warwick, Coventry, United Kingdom46. STFC Rutherford Appleton Laboratory, Didcot, United Kingdom47. School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom48. School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom49. Oliver Lodge Laboratory, University of Liverpool, Liverpool, United Kingdom50. Imperial College London, London, United Kingdom51. School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom52. Department of Physics, University of Oxford, Oxford, United Kingdom53. Syracuse University, Syracuse, NY, United States54. Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), Rio de Janeiro, Brazil55. Institut für Physik, Universit?t Rostock, Rostock, Germany56. P.N. Lebedev Physical Institute, Russian Academy of Science (LPI RAS), Moscow, Russia57. Università di Bari, Bari, Italy58. Università di Bologna, Bologna, Italy59. Università di Cagliari, Cagliari, Italy60. Università di Ferrara, Ferrara, Italy61. UniversitàdiFirenze, Firenze, Italy62. UniversitàdiUrbino, Urbino, Italy63. Università di Modena e Reggio Emilia, Modena, Italy64. Università di Genova, Genova, Italy65. UniversitàdiMilanoBicocca, Milano, Italy66. UniversitàdiRomaTorVergata, Roma, Italy67. Università di Roma La Sapienza, Roma, Italy68. Università della Basilicata, Potenza, Italy69. LIFAELS, La Salle, Universitat Ramon Llull, Barcelona, Spain70. Hanoi University of Science, Hanoi, Viet Nam
• ISSN：1029-8479

文摘

The isospin asymmetries of B?→?K (?) μ + μ ? decays and the partial branching fractions of B 0?→?K 0 μ + μ ? and B +?→?K ?+ μ + μ ? are measured as a function of the di-muon mass squared q 2 using an integrated luminosity of 1.0 fb?1 collected with the LHCb detector. The B?→?Kμ + μ ? isospin asymmetry integrated over q 2 is negative, deviating from zero with over 4 σ significance. The B?→?K ? μ + μ ? decay measurements are consistent with the Standard Model prediction of negligible isospin asymmetry. The observation of the decay B 0?→?K S μ + μ ? is reported with 5.7 σ significance. Assuming that the branching fraction of B 0?→?K 0 μ + μ ? is twice that of B 0?→?K S μ + μ ?, the branching fractions of B 0?→?K 0 μ + μ ? and B?→?K ?+ μ + μ ? are found to be (0.31?0.06)?×?10?6 and (1.16?±?0.19)?×?10?6, respectively.