| Measurement of the branching fraction and cp asymmetry in b-0 -> pi(0)pi(0) decays, and an improved constraint on phi(2) | |
| Julius, T.43; Sevior, M. E.43; Mohanty, G. B.66; Adachi, I.11,14; Aihara, H.70; Al Said, S.32,65; Asner, D. M.58; Aulchenko, V.3,56; Aushev, T.46; Ayad, R.65 | |
| 刊名 | Physical review d
 |
| 2017-08-31 | |
| 卷号 | 96期号:3页码:8 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/physrevd.96.032007 |
| 通讯作者 | Julius, t.() |
| 英文摘要 | We measure the branching fraction and cp violation asymmetry in the decay b-0 -> pi(0)pi(0), using a data sample of 752 x 10(6) b (b) over bar pairs collected at the y(4s) resonance with the belle detector at the kekb e(+)e(-) collider. the obtained branching fraction and direct cp asymmetry are b(b -> pi(0)pi(0)) = [1.31 +/- 0.19(stat) +/- 0.19(syst)] x 10(-6) and a(cp) = +0.14 +/- 0.36(stat) +/- 0.10(syst), respectively. the signal significance, including the systematic uncertainty, is 6.4 standard deviations. we combine these results with belle's earlier measurements of b-0 -> pi(+)pi(-) and b-+/- -> pi(+/-)pi(0) to exclude the cp-violating parameter phi(2) from the range 15.5 degrees < phi(2) < 75.0 degrees at 95% confidence level. |
| WOS关键词 | BELLE ; VIOLATION ; DETECTOR |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000408704400005 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2176992 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Julius, T. |
| 作者单位 | 1.Univ Basque Country UPV EHU, Bilbao 48080, Spain 2.Univ Bonn, D-53115 Bonn, Germany 3.Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia 4.Charles Univ Prague, Fac Math & Phys, CR-12116 Prague, Czech Republic 5.Chonnam Natl Univ, Kwangju 660701, South Korea 6.Univ Cincinnati, Cincinnati, OH 45221 USA 7.DESY, D-22607 Hamburg, Germany 8.Univ Florida, Gainesville, FL 32611 USA 9.Fu Jen Catholic Univ, Dept Phys, Taipei 24205, Taiwan 10.Justus Liebig Univ Giessen, D-35392 Giessen, Germany |
| 推荐引用方式 GB/T 7714 | Julius, T.,Sevior, M. E.,Mohanty, G. B.,et al. Measurement of the branching fraction and cp asymmetry in b-0 -> pi(0)pi(0) decays, and an improved constraint on phi(2)[J]. Physical review d,2017,96(3):8. |
| APA | Julius, T..,Sevior, M. E..,Mohanty, G. B..,Adachi, I..,Aihara, H..,...&Zupanc, A..(2017).Measurement of the branching fraction and cp asymmetry in b-0 -> pi(0)pi(0) decays, and an improved constraint on phi(2).Physical review d,96(3),8. |
| MLA | Julius, T.,et al."Measurement of the branching fraction and cp asymmetry in b-0 -> pi(0)pi(0) decays, and an improved constraint on phi(2)".Physical review d 96.3(2017):8. |
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