オクノ ショウジ   Okuno Shoji
  奥野 祥二
   所属   神奈川大学  工学部 情報システム創成学科
   職種   助教
言語種別 日本語
発行・発表の年月 2002/06
形態種別 学術雑誌
標題 Measurements of Branching Fractions and Decay Amplitudes in B → J/ψ K* decays
執筆形態 共著
掲載誌名 Phys.Lett.B538(2002)
巻・号・頁 11-20頁
概要 K.Abe,S.Okuno,et al.[Belle Collaboration],The branching fractions and the decay amplitudes of B → J/ψ K* decays are measured in a 29.4fb-1 data sample collected with the Belle detector at the KEKB electron-positron collider. The decay amplitudes of helicity states of the J/ψ K* system are determined from the full angular distribution of the final state particles in the transversity basis. The branching fractions are measured to be (1.29±0.05±0.13) × 10-3 for neutral mesons and (1.28±0.07±0.14) × 10-3 for charged mesons. The measured longitudinal and transverse (perpendicular to the transversity plane) amplitudes are |A0|2 = 0.62±0.02±0.03 and |A¶erp|2 = 0.19±0.02±0.03, respectively. The value of |A¶erp|2 shows that the CP even component dominates in the B0 → J/ψ K*0(KSπ0) decay.