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| 題名: | Evidence for semileptonic B-→ pp̄ℓ- ν̄ℓ decays |
| 作者: | 陳鎰鋒;Sahoo, H.;Golob, B.;Shapkin, M.;Sakai, Y.;Hulse, C. Van;Urquijo, Phillip;Li, J.;Kichimi, H.;Petrič, Marko;Goh, Y. M.;Chilikin, K.;Wagner, M. N.;Dalseno, J.;Schwanda, C.;Teramoto, Y.;Vanhoefer, P.;Röhrken, M.;Ogawa, S.;Natkaniec, Z.;Ko, B. R.;Unno, Yoshinobu;Zupanc, Anze;Klucar, J.;Nitoh, O.;Sibidanov, A.L.;Sumiyoshi, T.;Park, C. W.;Cheon, B. G.;Miyabayashi, K.;Kim, Yongsun;Gillard, R.;Chang, P.;Uno, S.;Chen, A.;Kim, J. B.;Zhang, Z. P.;Okuno, S.;Wang, M. Z.;Eidelman, S.I.;Cho, I. S.;Ritter, M.;Liventsev, D.;Ganguly, S.;Oswald, C.;Kim, D. Y.;Yashchenko, S.;Hou, W. S.;Bozek, A.;Moll, A.;Sohn, Y. S.;Saito, T.;Sokolov, Andrey;Hayashii, H.;Sumihama, M.;Aushev, T.;Savinov, V.;Julius, T.;Adachi, I.;Uglov, T.;Kodys, Peter;Kim, H. J.;Ferber, T.;Hsiung, Y. B.;Nishida, S.;Libby, J.;Kumita, T.;Watanabe, M.;Ostrowicz, W.;Watanabe, Y.;Farhat, H.;Haba, J.;Sanuki, T.;Yamaoka, J.;Kwon, Y. J.;Williams, K. M.;Kuhr, T.;Križan, P.;Dutta, D.;Shibata, T. A.;Vinokurova, A.;Semmler, D.;Piilonen, L. E.;Schneider, O.;Horii, Yasuyuki;Kuzmin, A.S.;Mohanty, G. B.;Kah, D. H.;Senyo, K.;Miyata, H.;Ng, C.;Drásal, Z.;Danilov, Mikhail;Kronenbitter, B.;Santel, D.;Aulchenko, V.M.;Ishikawa, A.;Shiu, J. G.;Kim, Jung-Hyun;Sevior, M. E.;Pestotnik, R. |
| 貢獻者: | 理學院物理學系 |
| 日期: | 2014-01-09 |
| 上傳時間: | 2026-04-23 11:54:28 (UTC+8) |
| 出版者: | American Physical Society;American Physical Society (APS) |
| 摘要: | 摘要： We find evidence for the semileptonic baryonic decay B- -> p (p) over barl(-)(nu) over bar (l) (l = e, mu), based on a data sample of 772 million B (B) over bar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy electron-positron collider. A neural-network based hadronic B-meson tagging method is used in this study. The branching fraction of B- -> p (p) over barl(-)(nu) over bar (l) is measured to be (5.8(-2.1)(+2.4)(stat) +/- 0.9(syst)) x 10(-6) with a significance of 3.2 sigma s, where lepton universality is assumed. We also estimate the corresponding upper limit: B(B- -> p (p) over barl(-)(nu) over bar (l)) < 9.6 x 10(-6) at the 90% confidence level. This measurement helps constrain the baryonic transition form factor in B decays.
出版者： American Physical Society (APS)
出版日期： 2014-01-09
出處： Physical Review D, 2014-01, Vol.89
識別號： ISSN: 1550-7998
識別號： EISSN: 1550-2368
識別號： DOI: 10.1103/physrevd.89.011101 |
| 顯示於類別: | [物理學系] 期刊論文
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