Measurement of the decays b -> eta lv(l) and b -> eta ' lv(l) in fully reconstructed events at belle
文献类型：期刊论文
| 作者 | Beleno, C.31; Dingfelder, J.77; Urquijo, P.23; Aihara, H.69; Al Said, S.11,63; Asner, D. M.54; Aushev, T.43; Ayad, R.63; Babu, V.64; Badhrees, I.10,63 |
| 刊名 | Physical review d
 |
| 出版日期 | 2017-11-28 |
| 卷号 | 96期号:9页码:8 |
| ISSN号 | 2470-0010 |
| DOI | 10.1103/physrevd.96.091102 |
| 通讯作者 | Beleno, c.() |
| 英文摘要 | We report branching fraction measurements of the decays b+ -> eta l(+)v(l) and b+ -> eta'l(+)v(l) based on 711 fb(-1) of data collected near the (sic)(4s) resonance with the belle experiment at the kekb asymmetric-energy e(+)e(-) collider. this data sample contains 772 million b (b) over bar events. one of the two b mesons is fully reconstructed in a hadronic decay mode. among the remaining ("signal-b") daughters, we search for the eta meson in two decay channels, eta -> gamma gamma and eta -> pi(+)pi(-)pi(0), and reconstruct the eta' meson in eta' -> eta pi(+)pi(-) with subsequent decay of the eta into gamma gamma combining the two. modes and using an extended maximum likelihood, the b+ -> eta l(+)v(l) branching fraction is measured to be (4.2 +/- 1.1 (stat.) +/- 0.3 (syst.)) x 10(-5). for b+ -> eta l(+)v(l),we observe no significant signal and set an upper limit of 0.72 x 10(-4) at 90% confidence level. |
| WOS关键词 | IDENTIFICATION ; DETECTOR ; PACKAGE ; KEKB |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000416315000001 |
| 出版者 | AMER PHYSICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178297 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Beleno, C. |
| 作者单位 | 1.Indian Inst Technol, Madras 600036, Tamil Nadu, India 2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China 3.Inst High Energy Phys, A-1010 Vienna, Austria 4.Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy 5.Japan Atom Energy Agcy, Adv Sci Res Ctr, Naka, Ibaraki 3191195, Japan 6.J Stefan Inst, Ljubljana 1000, Slovenia 7.Kanagawa Univ, Yokohama, Kanagawa 2218686, Japan 8.Karlsruhe Inst Technol, Inst Expt Kernphys, D-76131 Karlsruhe, Germany 9.Kennesaw State Univ, Kennesaw 30144, Rep of Georgia 10.King Abdulaziz City Sci & Technol, Riyadh 11442, Saudi Arabia |
| 推荐引用方式 GB/T 7714 | Beleno, C.,Dingfelder, J.,Urquijo, P.,et al. Measurement of the decays b -> eta lv(l) and b -> eta ' lv(l) in fully reconstructed events at belle[J]. Physical review d,2017,96(9):8. |
| APA | Beleno, C..,Dingfelder, J..,Urquijo, P..,Aihara, H..,Al Said, S..,...&Zupanc, A..(2017).Measurement of the decays b -> eta lv(l) and b -> eta ' lv(l) in fully reconstructed events at belle.Physical review d,96(9),8. |
| MLA | Beleno, C.,et al."Measurement of the decays b -> eta lv(l) and b -> eta ' lv(l) in fully reconstructed events at belle".Physical review d 96.9(2017):8. |
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