Back to Search Start Over

Evidence for semileptonic B- -> p(p)over-barl(-)(nu)over-bar(l) decays

Authors :
Tien, K. -J.
Wang, M. -Z.
Adachi, I.
Aihara, H.
Asner, D. M.
Aulchenko, V.
Aushev, T.
Bakich, A. M.
Bala, A.
Bhuyan, B.
Bozek, A.
Bracko, M.
Browder, T. E.
Chang, P.
Chekelian, V.
Chen, A.
Chen, P.
Cheon, B. G.
Chilikin, K.
Chistov, R.
Cho, I. -S.
Cho, K.
Chobanova, V.
Choi, Y.
Cinabro, D.
Dalseno, J.
Danilov, M.
Dolezal, Z.
Drasal, Z.
Dutta, D.
Eidelman, S.
Farhat, H.
Fast, J. E.
Ferber, T.
Gaur, V.
Ganguly, S.
Gillard, R.
Goh, Y. M.
Golob, B.
Haba, J.
Hayashii, H.
Horii, Y.
Hoshi, Y.
Hou, W. -S.
Hsiung, Y. B.
Huschle, M.
Hyun, H. J.
Iijima, T.
Ishikawa, A.
Itoh, R.
Iwasaki, Y.
Julius, T.
Kah, D. H.
Kang, J. H.
Kato, E.
Kawasaki, T.
Kichimi, H.
Kiesling, C.
Kim, D. Y.
Kim, H. J.
Kim, J. B.
Kim, J. H.
Kim, Y. J.
Klucar, J.
Ko, B. R.
Kodys, P.
Korpar, S.
Krizan, P.
Krokovny, P.
Kronenbitter, B.
Kuhr, T.
Kumita, T.
Kuzmin, A.
Kwon, Y. -J.
Lee, S. -H.
Li, J.
Li, Y.
Libby, J.
Liu, C.
Liu, Y.
Liventsev, D.
Lukin, P.
Miyabayashi, K.
Miyata, H.
Mohanty, G. B.
Moll, A.
Mussa, R.
Nakano, E.
Nakao, M.
Natkaniec, Z.
Nayak, M.
Nedelkovska, E.
Ng, C.
Nisar, N. K.
Nishida, S.
Nitoh, O.
Ogawa, S.
Okuno, S.
Olsen, S. L.
Ostrowicz, W.
Oswald, C.
Park, C. W.
Park, H.
Park, H. K.
Pedlar, T. K.
Pestotnik, R.
Petric, M.
Piilonen, L. E.
Ritter, M.
Roehrken, M.
Rostomyan, A.
Sahoo, H.
Saito, T.
Sakai, Y.
Sandilya, S.
Santel, D.
Santelj, L.
Sanuki, T.
Sato, Y.
Savinov, V.
Schneider, O.
Schnell, G.
Schwanda, C.
Semmler, D.
Senyo, K.
Seon, O.
Sevior, M. E.
Shapkin, M.
Shen, C. P.
Shibata, T. -A.
Shiu, J. -G.
Sibidanov, A.
Sohn, Y. -S.
Sokolov, A.
Stanic, S.
Staric, M.
Steder, M.
Sumihama, M.
Sumiyoshi, T.
Tanida, K.
Tatishvili, G.
Teramoto, Y.
Uchida, M.
Uehara, S.
Uglov, T.
Unno, Y.
Uno, S.
Urquijo, P.
Vahsen, S. E.
Van Hulse, C.
Vanhoefer, P.
Varner, G.
Varvell, K. E.
Vinokurova, A.
Vorobyev, V.
Wagner, M. N.
Wang, C. H.
Wang, P.
Watanabe, M.
Watanabe, Y.
Williams, K. M.
Won, E.
Yamaoka, J.
Yamashita, Y.
Yashchenko, S.
Zhang, Z. P.
Zhilich, V.
Zhulanov, V.
Zupanc, A.
Belle Collaboration
Publisher :
Amer Physical Soc

Abstract

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.

Subjects

Subjects :
High Energy Physics::Phenomenology
High Energy Physics::Experiment

Details

Database :
OpenAIRE
Accession number :
edsair.od.......185..9dd23a1134511faed34054696e0917e3

Tools

Authors Abstract Subjects Details