Measurement of the CP-Violation Parameter sin2 phi(1) with a New Tagging Method at the Y(5S) Resonance

	Measurement of the CP-Violation Parameter sin2 phi(1) with a New Tagging Method at the Y(5S) Resonance
	Belle Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2012
卷号	108 期号:17
关键词	BELLE
通讯作者	Sato, Y (reprint author), Tohoku Univ, Sendai, Miyagi 980, Japan.
英文摘要	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.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000306916700001
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213300]
专题	高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Belle Collaboration. Measurement of the CP-Violation Parameter sin2 phi(1) with a New Tagging Method at the Y(5S) Resonance[J]. PHYSICAL REVIEW LETTERS,2012,108(17).
APA	Belle Collaboration.(2012).Measurement of the CP-Violation Parameter sin2 phi(1) with a New Tagging Method at the Y(5S) Resonance.PHYSICAL REVIEW LETTERS,108(17).
MLA	Belle Collaboration."Measurement of the CP-Violation Parameter sin2 phi(1) with a New Tagging Method at the Y(5S) Resonance".PHYSICAL REVIEW LETTERS 108.17(2012).