학술논문

Search for $B^- \to \Lambda \bar p \nu \bar\nu$ with the BABAR experiment
Document Type
Working Paper
Author
The BABAR CollaborationLees, J. P.Poireau, V.Tisserand, V.Grauges, E.Palano, A.Eigen, G.Brown, D. N.Kolomensky, Yu. G.Fritsch, M.Koch, H.Schroeder, T.Cheaib, R.Hearty, C.Mattison, T. S.McKenna, J. A.So, R. Y.Blinov, V. E.Buzykaev, A. R.Druzhinin, V. P.Golubev, V. B.Kozyrev, E. A.Kravchenko, E. A.Onuchin, A. P.Serednyakov, S. I.Skovpen, Yu. I.Solodov, E. P.Todyshev, K. Yu.Lankford, A. J.Dey, B.Gary, J. W.Long, O.Eisner, A. M.Lockman, W. S.Vazquez, W. PanduroChao, D. S.Cheng, C. H.Echenard, B.Flood, K. T.Hitlin, D. G.Kim, J.Li, Y.Miyashita, T. S.Ongmongkolkul, P.Porter, F. C.Röhrken, M.Huard, Z.Meadows, B. T.Pushpawela, B. G.Sokoloff, M. D.Sun, L.Smith, J. G.Wagner, S. R.Bernard, D.Verderi, M.Bettoni, D.Bozzi, C.Calabrese, R.Cibinetto, G.Fioravanti, E.Garzia, I.Luppi, E.Santoro, V.Calcaterra, A.de Sangro, R.Finocchiaro, G.Martellotti, S.Patteri, P.Peruzzi, I. M.Piccolo, M.Rotondo, M.Zallo, A.Passaggio, S.Patrignani, C.Lacker, H. M.Bhuyan, B.Mallik, U.Chen, C.Cochran, J.Prell, S.Gritsan, A. V.Arnaud, N.Davier, M.Diberder, F. LeLutz, A. M.Wormser, G.Lange, D. J.Wright, D. M.Coleman, J. P.Gabathuler, E.Hutchcroft, D. E.Payne, D. J.Touramanis, C.Bevan, A. J.Di Lodovico, F.Sacco, R.Cowan, G.Banerjee, Sw.Davis, C. L.Denig, A. G.Gradl, W.Griessinger, K.Hafner, A.Schubert, K. R.Barlow, R. J.Lafferty, G. D.Cenci, R.Jawahery, A.Roberts, D. A.Cowan, R.Robertson, S. H.Seddon, R. M.Neri, N.Palombo, F.Cremaldi, L.Godang, R.Summers, D. J.Taras, P.De Nardo, G.Sciacca, C.Raven, G.Jessop, C. P.LoSecco, J. M.Honscheid, K.Kass, R.Gaz, A.Margoni, M.Posocco, M.Simi, G.Simonetto, F.Stroili, R.Akar, S.Ben-Haim, E.Bomben, M.Bonneaud, G. R.Calderini, G.Chauveau, J.Marchiori, G.Ocariz, J.Biasini, M.Manoni, E.Rossi, A.Batignani, G.Bettarini, S.Carpinelli, M.Casarosa, G.Chrzaszcz, M.Forti, F.Giorgi, M. A.Lusiani, A.Oberhof, B.Paoloni, E.Rama, M.Rizzo, G.Walsh, J. J.Zani, L.Smith, A. J. S.Anulli, F.Faccini, R.Ferrarotto, F.Ferroni, F.Pilloni, A.Piredda, G.Bünger, C.Dittrich, S.Grünberg, O.Heß, M.Leddig, T.Voß, C.Waldi, R.Adye, T.Wilson, F. F.Emery, S.Vasseur, G.Aston, D.Cartaro, C.Convery, M. R.Dorfan, J.Dunwoodie, W.Ebert, M.Field, R. C.Fulsom, B. G.Graham, M. T.Hast, C.Innes, W. R.Kim, P.Leith, D. W. G. S.Luitz, S.MacFarlane, D. B.Muller, D. R.Neal, H.Ratcliff, B. N.Roodman, A.Sullivan, M. K.Va'vra, J.Wisniewski, W. J.Purohit, M. V.Wilson, J. R.Randle-Conde, A.Sekula, S. J.Ahmed, H.Bellis, M.Burchat, P. R.Puccio, E. M. T.Alam, M. S.Ernst, J. A.Gorodeisky, R.Guttman, N.Peimer, D. R.Soffer, A.Spanier, S. M.Ritchie, J. L.Schwitters, R. F.Izen, J. M.Lou, X. C.Bianchi, F.De Mori, F.Filippi, A.Gamba, D.Lanceri, L.Vitale, L.Martinez-Vidal, F.Oyanguren, A.Albert, J.Beaulieu, A.Bernlochner, F. U.King, G. J.Kowalewski, R.Lueck, T.Nugent, I. M.Roney, J. M.Sobie, R. J.Tasneem, N.Gershon, T. J.Harrison, P. F.Latham, T. E.Prepost, R.Wu, S. L.
Source
Phys. Rev. D 100, 111101 (2019)
Subject
High Energy Physics - Experiment
Language
Abstract
We search for the rare flavor-changing neutral current process $B^- \to \Lambda {\overline p} \nu{\overline{\nu}}$ using data from the BABAR experiment. A total of 424 fb$^{-1}$ of $e^+e^-$ collision data collected at the center-of-mass energy of the $\Upsilon$(4S) resonance is used in this study, corresponding to a sample of ${(471 \pm 3) \times 10^{6}}$ $B\overline{B}$ pairs. Signal $B^- \to \Lambda {\overline p} \nu{\overline{\nu}}$ candidates are identified by first fully reconstructing a $B^+$ decay in one of many possible exclusive decays to hadronic final states, then examining detector activity that is not associated with this reconstructed $B^+$ decay for evidence of a signal $B^- \to \Lambda {\overline p} \nu{\overline{\nu}}$ decay. The data yield is found to be consistent with the expected background contribution under a null signal hypothesis, resulting in an upper limit of ${{\cal B} (B^- \to \Lambda {\overline p} \nu{\overline{\nu}}) < 3.0\times 10^{-5}}$ at the $90\%$ confidence level.
Comment: 10 pages, 7 figures