4.7 Article

Measurement of the (B)over-bar → Xsγ branching fraction with a sum of exclusive decays

Journal

PHYSICAL REVIEW D
Volume 91, Issue 5, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.91.052004

Keywords

-

Funding

  1. Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan,
  2. Japan Society for the Promotion of Science (JSPS)
  3. Tau-Lepton Physics Research Center of Nagoya University
  4. Australian Research Council
  5. Austrian Science Fund [P 22742-N16, P 26794-N20]
  6. National Natural Science Foundation of China [10575109, 10775142, 10825524, 10875115, 10935008, 11175187]
  7. Ministry of Education, Youth and Sports of the Czech Republic [LG14034]
  8. Carl Zeiss Foundation
  9. Deutsche Forschungsgemeinschaft
  10. VolkswagenStiftung
  11. Department of Science and Technology of India
  12. Istituto Nazionale di Fisica Nucleare of Italy
  13. the National Research Foundation of Korea [2011-0029457, 2012-0008143, 2012R1A1A2008330, 2013R1A1A3007772, 2014R1A2A2A01005286]
  14. BRL program under NRF Grants [KRF-20110020333, KRF-2011-0021196]
  15. Center for Korean J-PARC Users [NRF-2013K1A3A7A06056592]
  16. BK21 Plus program
  17. GSDC of the Korea Institute of Science and Technology Information
  18. Polish Ministry of Science and Higher Education and the National Science Center
  19. Ministry of Education and Science of the Russian Federation
  20. Russian Federal Agency for Atomic Energy
  21. Slovenian Research Agency
  22. Basque Foundation for Science (IKERBASQUE)
  23. UPV/EHU under program [UFI 11/55]
  24. Swiss National Science Foundation
  25. National Science Council and the Ministry of Education of Taiwan
  26. U.S. Department of Energy and the National Science Foundation
  27. MEXT for Science Research in a Priority Area (New Development of Flavor Physics)
  28. JSPS for Creative Scientific Research (Evolution of Tau-lepton Physics)
  29. Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan,
  30. Japan Society for the Promotion of Science (JSPS)
  31. Tau-Lepton Physics Research Center of Nagoya University
  32. Australian Research Council
  33. Austrian Science Fund [P 22742-N16, P 26794-N20]
  34. National Natural Science Foundation of China [10575109, 10775142, 10825524, 10875115, 10935008, 11175187]
  35. Ministry of Education, Youth and Sports of the Czech Republic [LG14034]
  36. Carl Zeiss Foundation
  37. Deutsche Forschungsgemeinschaft
  38. VolkswagenStiftung
  39. Department of Science and Technology of India
  40. Istituto Nazionale di Fisica Nucleare of Italy
  41. the National Research Foundation of Korea [2011-0029457, 2012-0008143, 2012R1A1A2008330, 2013R1A1A3007772, 2014R1A2A2A01005286]
  42. BRL program under NRF Grants [KRF-20110020333, KRF-2011-0021196]
  43. Center for Korean J-PARC Users [NRF-2013K1A3A7A06056592]
  44. BK21 Plus program
  45. GSDC of the Korea Institute of Science and Technology Information
  46. Polish Ministry of Science and Higher Education and the National Science Center
  47. Ministry of Education and Science of the Russian Federation
  48. Russian Federal Agency for Atomic Energy
  49. Slovenian Research Agency
  50. Basque Foundation for Science (IKERBASQUE)
  51. UPV/EHU under program [UFI 11/55]
  52. Swiss National Science Foundation
  53. National Science Council and the Ministry of Education of Taiwan
  54. U.S. Department of Energy and the National Science Foundation
  55. MEXT for Science Research in a Priority Area (New Development of Flavor Physics)
  56. JSPS for Creative Scientific Research (Evolution of Tau-lepton Physics)
  57. Grants-in-Aid for Scientific Research [14J04171] Funding Source: KAKEN

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We use 772 x 10(6) B (B) over bar meson pairs collected at the gamma(4S) resonance with the Belle detector to measure the branching fraction for (B) over bar -> X-s gamma Our measurement uses a sum-of-exclusives approach in which 38 of the hadronic final states with strangeness equal to +1, denoted by X-s, are reconstructed. The inclusive branching fraction for M-Xs < 2.8 GeV/c(2), which corresponds to a minimum photon energy of 1.9 GeV, is measured to be B(<(B)over bar> -> X-s gamma) = (3.51 +/- 0.17 +/- 0.33) x 10(-4), where the first uncertainty is statistical and the second is systematic.

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