Search for \(B^- \to \Lambda \bar p \nu \bar\nu\) with the BABAR experiment

• Published in: arXiv.org
• Main Authors: Tisserand, V, Brown, D N, Kolomensky, Yu G, Fritsch, M, Koch, H, Hearty, C, Blinov, V E, Druzhinin, V P, Kozyrev, E A, Kravchenko, E A, Onuchin, A P, Serednyakov, S I, Solodov, E P, K Yu Todyshev, Chao, D S, Hitlin, D G, Miyashita, T S, Ongmongkolkul, P, Porter, F C, Röhrken, M, Huard, Z, Pushpawela, B G, Sun, L, Wagner, S R, Bernard, D, Bettoni, D, Fioravanti, E, Garzia, I, Luppi, E, de Sangro, R, Finocchiaro, G, Peruzzi, I M, Passaggio, S, Prell, S, Gritsan, A V, Arnaud, N, Davier, M, F Le Diberder, Wormser, G, Gabathuler, E, Touramanis, C, F Di Lodovico, Cowan, G, Gradl, W, Hafner, A, Cenci, R, Jawahery, A, Roberts, D A, Cowan, R, Robertson, S H, Cremaldi, L, Taras, P, De Nardo, G, Sciacca, C, Jessop, C P, Kass, R, Simi, G, Simonetto, F, Stroili, R, Akar, S, Ben-Haim, E, Ocariz, J, Manoni, E, Chrzaszcz, M, Oberhof, B, Paoloni, E, Zani, L, Pilloni, A, Grünberg, O, Heß, M, C Vo\ss, Waldi, R, Convery, M R, Dorfan, J, Dunwoodie, W, Ebert, M, Graham, M T, Kim, P, D W G S Leith, Muller, D R, Ratcliff, B N, Roodman, A, Sullivan, M K, Wisniewski, W J, Wilson, J R, Burchat, P R, Gorodeisky, R, Soffer, A, Spanier, S M, Schwitters, R F, Lou, X C, Bianchi, F, De Mori, F, Lanceri, L, Vitale, L, Martinez-Vidal, F, Beaulieu, A, Lueck, T, Nugent, I M, Gershon, T J
• Format: Paper
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 10.12.2019
• Subjects: Confidence intervals; Decay; Neutral currents
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1908.07425

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.