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 2001/09
形態種別 学術雑誌
標題 Measurement of Branching Fractions for B → ππ, Kπ and KK Decays
執筆形態 共著
掲載誌名 Physical Review Letters:Volume87, 101801, 5pages(2001)
概要 K. Abe, S. Okuno, et al. [Belle Collaboration],
We report measurements of the branching fractions for B0 → π+π-, K+π-, K+K-, and K0π0 and B+ → π+π0, K+π0, K0π+, and K+{K}0, based on 10.4fb-1 of data collected on the
υ(4S) resonance with the Belle detector. We
find~ B(B0 → π+π-)~ = (0.56+0.23+0.04-0.20-0.05) ×
10-5,B(B0K+π-) = (1.93+0.34+0.15-0.32-0.06) ×
10-5,B(B+K+π0) = (1.63+0.35+0.16-0.33-0.18) ×
10-5,B(B+K0π+) = (1.37+0.57+0.19-0.48-0.18) × 10-5,
and B(B0K0π0) = (1.60+0.72+0.25-0.59-0.27) × 10-5. We also set upper limits on the branching fractions for B+ → π+π0, B0K+K-, and B+K+π0.