研究者情報 | 神奈川大学

オクノ　ショウジ Okuno Shoji 奥野　祥二所属神奈川大学情報学部システム数理学科職種助教
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(K_Sπ⁰) decay.