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공공누리This item is licensed Korea Open Government License

Title
First observation of the $P$-wave spin-singlet bottomonium states $h_b(1P)$ and $h_b(2P)$.
Author(s)
I.Adachi조기현
Publication Year
2012-01-18
Abstract
Wereportthefirstobservationsofthespin-singletbottomoniumstateshb
ð1PÞandhb
ð2PÞ.Thestates
areproducedinthereactioneþe!hb
ðnPÞþusinga121:4fb1datasamplecollectedatenergies
neartheð5SÞresonancewiththeBelledetectorattheKEKBasymmetric-energyeþecollider.We
determineM½hb
ð1PÞ¼ð9898:2þ1:1þ1:0
1:01:1
ÞMeV=c2andM½hb
ð2PÞ¼ð10259:80:6þ1:4
1:0
ÞMeV=c2,
whichcorrespondtoP-wavehyperfinesplittingsMHF
¼ðþ1:71:5Þandðþ0:5þ1:6
1:2
ÞMeV=c2,respectively.
Thesignificancesofthehb
ð1PÞandhb
ð2PÞare5:5and11:2,respectively.Wefindthatthe
productionofthehb
ð1PÞandhb
ð2PÞisnotsuppressedrelativetotheproductionoftheð1SÞ,ð2SÞ,and
ð3SÞ.
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/10580/13993
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