Measurement of the direct CP asymmetry in B ¯ →xs+dγ decays with a lepton tag

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/105261

Title:	Measurement of the direct CP asymmetry in B ¯ →xs+dγ decays with a lepton tag
Authors:	陳鎰鋒;Pesantez, L
Contributors:	理學院物理學系
Keywords:	Asymmetry;Decay;Detectors;Energy measurement;Frames;Mathematical models;Photons;Thresholds
Date:	2015-04-15
Issue Date:	2026-04-23 12:13:44 (UTC+8)
Publisher:	American Physical Society
Abstract:	摘要： We report the measurement of the direct CP asymmetry in the radiative B super(-) arrow right Xs+d gamma decay using a data sample of (772+ or -11)x106 BB super(-) pairs collected at the gamma (4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The CP asymmetry is measured as a function of the photon energy threshold. For E gamma > or =2.1 GeV, where E gamma is the photon energy in the center-of-mass frame, we obtain ACP(B super(-) arrow right Xs+d gamma )=(2.2+ or -3.9+ or -0.9)%, consistent with the standard model prediction. 出版日期： 2015-04-17 出處： Physical review letters, 2015-04, Vol.114 (15) 資源來源： American Physical Society Journals 識別號： ISSN: 0031-9007 識別號： EISSN: 1079-7114 識別號： DOI: 10.1103/PhysRevLett.114.151601
Appears in Collections:	[Department of Physics] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	20	View/Open

社群 sharing