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공공누리This item is licensed Korea Open Government License

Title
Evidence for Direct CP Violation in $B\pm \to \eta h\pm$ and Observation of $B0 \to \eta K0$.
Author(s)
C-T,Hoi김정현조기현
Publication Year
2012-01-20
Abstract
WereportmeasurementsofthebranchingfractionsandCPasymmetriesforB!h(h¼Kor)
andtheobservationofthedecayB0!K0fromthefinaldatasampleof772106BBpairscollected
withtheBelledetectorattheKEKBasymmetric-energyeþecollider.Themeasuredbranchingfractions
areBðB!KÞ¼ð2:120:230:11Þ106,BðB!Þ¼ð4:070:260:21Þ106,
andBðB0!K0Þ¼ð1:27þ0:33
0:29
0:08Þ106,wherethelastdecayisobservedforthefirsttime
withasignificanceof5.4standarddeviations().WealsofindevidenceforCPviolationinthechargedB
modes,ACP
ðB!KÞ¼0:380:110:01andACP
ðB!Þ¼0:190:060:01with
significancesof3:8and3:0,respectively.Forallmeasurements,thefirstandseconduncertaintiesare
statisticalandsystematic,respectively.
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/10580/13992
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