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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 |
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言語種別 | 日本語 |
発行・発表の年月 | 2002/08 |
形態種別 | 学術雑誌 |
標題 | Study of CP-Violating Asymmetries in B0 → π+π- Decays |
執筆形態 | 共著 |
掲載誌名 | Phys.Rev.Lett.89,071801(2002)(6pages) |
概要 | K.Abe,S.Okuno,et al.[Belle Collaboration],We present a measurement of CP-violating asymmetries in B0 → π+π- decays based on a 41.8fb-1 data sample collected at the υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We fully reconstruct one neutral B meson as a B0 → π+π- CP eigenstate and identify the flavor of the accompanying B meson from its decay products. From the asymmetry in the distribution of the time intervals between the two B meson decay points, we obtain the CP-violating asymmetry parameters Sππ = -1.21-0.27+0.38(stat)-0.13+0.16(syst) and Aππ = +0.94-0.31+0.25(stat)±0.09(syst). |