Evidence for isospin violation and measurement of cp asymmetries in b -> k*(892)gamma
文献类型：期刊论文
| 作者 | Horiguchi, T.73; Ishikawa, A.73; Yamamoto, H.73; Adachi, I.10,13; Aihara, H.75; Al Said, S.33,68; Asner, D. M.59; Aulchenko, V.3,57; Aushev, T.47; Ayad, R.68 |
| 刊名 | Physical review letters
 |
| 出版日期 | 2017-11-07 |
| 卷号 | 119期号:19页码:8 |
| ISSN号 | 0031-9007 |
| DOI | 10.1103/physrevlett.119.191802 |
| 通讯作者 | Horiguchi, t.() |
| 英文摘要 | We report the first evidence for isospin violation in b -> k*gamma and the first measurement of the difference of cp asymmetries between b+->.k*(+)gamma and b-0 -> k-*0 gamma. this analysis is based on the data sample containing 772 x 10(6)bb pairs that was collected with the belle detector at the kekb energy-asymmetric e(+)e(-) collider. we find evidence for the isospin violation with a significance of 3.1 sigma, delta(0+) = [+6.2 +/- 1.5(stat) +/- 0.6(syst) +/- 1.2(f (+-)/f(00))] %, where the third uncertainty is due to the uncertainty on the fraction of b+b- to (bb0)-b-0 production in gamma(4s) decays. the measured value is consistent with predictions of the standard model. the result for the difference of cp asymmetries is delta a(cp) = [+2.4 +/- 2.8(stat) +/- 0.5(syst)] %, consistent with zero. the measured branching fractions and cp asymmetries for charged and neutral b meson decays are the most precise to date. we also calculate the ratio of branching fractions of b-0 -> k-*0 gamma to b-s(0) -> phi gamma. |
| WOS关键词 | K-ASTERISK-GAMMA ; TO-LEADING ORDER ; DECAYS ; ANNIHILATION ; SYMMETRY ; BREAKING ; PACKAGE ; BELLE |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | AMER PHYSICAL SOC |
| WOS记录号 | WOS:000414535600004 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176906 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Horiguchi, T. |
| 作者单位 | 1.Univ Basque Country, UPV EHU, Bilbao 48080, Spain 2.Beihang Univ, Beijing 100191, Peoples R China 3.Budker Inst Nucl Phys SB RAS, Novosibirsk 630090, Russia 4.Charles Univ Prague, Fac Math & Phys, Prague 12116, Czech Republic 5.Chonnam Natl Univ, Kwangju 660701, South Korea 6.Univ Cincinnati, Cincinnati, OH 45221 USA 7.Deutsches Elektronen Synchrotron, D-22607 Hamburg, Germany 8.Univ Florida, Gainesville, FL 32611 USA 9.Justus Liebig Univ Giessen, D-35392 Giessen, Germany 10.Grad Univ Adv Studies, SOKENDAI, Hayama 2400193, Japan |
| 推荐引用方式 GB/T 7714 | Horiguchi, T.,Ishikawa, A.,Yamamoto, H.,et al. Evidence for isospin violation and measurement of cp asymmetries in b -> k*(892)gamma[J]. Physical review letters,2017,119(19):8. |
| APA | Horiguchi, T..,Ishikawa, A..,Yamamoto, H..,Adachi, I..,Aihara, H..,...&Zupanc, A..(2017).Evidence for isospin violation and measurement of cp asymmetries in b -> k*(892)gamma.Physical review letters,119(19),8. |
| MLA | Horiguchi, T.,et al."Evidence for isospin violation and measurement of cp asymmetries in b -> k*(892)gamma".Physical review letters 119.19(2017):8. |
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