Evidence for semileptonic B- -˃ p(p)over-barl(-)(nu)over-bar(l) decays
- Title
- Evidence for semileptonic B- -˃ p(p)over-barl(-)(nu)over-bar(l) decays
- Author
- 천병구
- Issue Date
- 2014-01
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW D, v. 89, NO 1, Page. 11101-11101
- Abstract
- We find evidence for the semileptonic baryonic decay B- -˃ p (p) over barl(-)(nu) over bar (l) (l = e, mu), based on a data sample of 772 million B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy electron-positron collider. A neural-network based hadronic B-meson tagging method is used in this study. The branching fraction of B- -˃ p (p) over barl(-)(nu) over bar (l) is measured to be (5.8(-2.1)(+2.4)(stat) +/- 0.9(syst)) x 10(-6) with a significance of 3.2 sigma s, where lepton universality is assumed. We also estimate the corresponding upper limit: B(B- -˃ p (p) over barl(-)(nu) over bar (l)) ˂ 9.6 x 10(-6) at the 90% confidence level. This measurement helps constrain the baryonic transition form factor in B decays.
- URI
- http://journals.aps.org/prd/abstract/10.1103/PhysRevD.89.011101https://repository.hanyang.ac.kr/handle/20.500.11754/69965
- ISSN
- 2470-0029; 2470-0010
- DOI
- 10.1103/PhysRevD.89.011101
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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