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	2001/04
形態種別	学術雑誌
標題	Measurement of B_d⁰!－{B}_d⁰! mixing rate from the time evolution of dilepton events at the υ(4S)
執筆形態	共著
掲載誌名	Physical Review Letters:Volume86,Issue15
巻・号・頁	3228-3232頁
概要	K.Abe, S.Okuno, et al.［Belle Collaboration］, We report a determination of the B_d⁰!－{B}_d⁰! mixing parameter δm_d based on the time evolution ofdilepton yields in υ(4S)decays.The measurement is based on a 5.9 fb^-¹data sample collected by the Belle detector at KEKB.The proper-time difference destributions for same-sign and opposite-sign dilepton events are simultaneously fitted to an expression containing δm_d as a free parameter.Using both muons and electrons,we obtain δm_d = 0.463±.008(stat)±.016(syst) ps^-1. This is the first determination of δm_d from time evolution measurements at the υ(4S).We also place limits on possible CPT violations.