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공공누리This item is licensed Korea Open Government License

Title
Measurement of the CP-violation Parameter sin2\phi_1 with a New Tagging Method at the \Upsilon(5S) Resonance.
Author(s)
Y.Sato김정현조기현
Publication Year
2012-04-23
Abstract
WereportameasurementoftheCP-violationparametersin21attheð5SÞresonanceusinganew
taggingmethod,called‘‘B-tagging.’’Inð5SÞdecayscontaininganeutralBmeson,achargedB,anda
chargedpion,theneutralBisreconstructedintheJ=cK0S
CP-eigenstatedecaychannel.Theinitialflavor
oftheneutralBmesonatthemomentoftheð5SÞdecayisoppositetothatofthechargedBandmaythus
beinferredfromthechargeofthepionwithoutreconstructingthechargedB.Fromtheasymmetry
betweenB-þandB-taggedJ=cK0S
yields,wedeterminesin21
¼0:570:58ðstatÞ0:06ðsystÞ.
Theresultsarebasedon121fb1ofdatarecordedbytheBelledetectorattheKEKBeþecollider.
Keyword
HighEnergyPhysics; ParticlePhysics; belle
Journal Title
PhysicalReviewLetters
Citation Volume
108
ISSN
0031-9007
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Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/14107
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