Measurement of the CP-Violation Parameter sin2 phi(1) with a New Tagging Method at the Y(5S) Resonance
- Title
- Measurement of the CP-Violation Parameter sin2 phi(1) with a New Tagging Method at the Y(5S) Resonance
- Author
- 천병구
- Issue Date
- 2012-04
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW LETTERS, 2012, 108(17), P.171801
- Abstract
- We report a measurement of the CP-violation parameter sin2 phi(1) at the Y(5S) resonance using a new tagging method, called "B-pi tagging.'' In Y(5S) decays containing a neutral B meson, a charged B, and a charged pion, the neutral B is reconstructed in the J / psi K-S(0) CP-eigenstate decay channel. The initial flavor of the neutral B meson at the moment of the Y(5S) decay is opposite to that of the charged B and may thus be inferred from the charge of the pion without reconstructing the charged B. From the asymmetry between B-pi(+) and B-pi(-) tagged J / psi K-S(0) yields, we determine sin2 phi(1) 0.57 +/- 0.58(stat) +/- 0.06(syst). The results are based on 121 fb(-1) of data recorded by the Belle detector at the KEKB e(+)e(-) collider.
- URI
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.108.171801https://repository.hanyang.ac.kr/handle/20.500.11754/70940
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.108.171801
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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