Search for $B^0$ meson decays into $Λ$ and missing energy with a hadronic tagging method at Belle
Creators: name: Belle Collaboration
name: Hadjivasiliou, C.
name: Fulsom, B. G.
name: Strube, J. F.
name: Adachi, I.
name: Aihara, H.
name: Asner, D. M.
name: Atmacan, H.
name: Aushev, T.
name: Babu, V.
name: Belous, K.
name: Bennett, J.
name: Bessner, M.
name: Bhardwaj, V.
name: Bhuyan, B.
name: Bilka, T.
name: Biswal, J.
name: Bodrov, D.
name: Borah, J.
name: Bozek, A.
name: Bračko, M.
name: Branchini, P.
name: Browder, T. E.
name: Budano, A.
name: Campajola, M.
name: Červenkov, D.
name: Chang, M. -C.
name: Chang, P.
name: Chen, A.
name: Cheon, B. G.
name: Chilikin, K.
name: Cho, H. E.
name: Choi, S. -K.
name: Choi, Y.
name: Choudhury, S.
name: Cinabro, D.
name: Cunliffe, S.
name: Das, S.
name: De Pietro, G.
name: Di Capua, F.
name: Doležal, Z.
name: Dong, T. V.
name: Dossett, D.
name: Epifanov, D.
name: Ferber, T.
name: Garg, R.
name: Gaur, V.
name: Giri, A.
name: Goldenzweig, P.
name: Gu, T.
name: Gudkova, K.
name: Hayashii, H.
name: Hou, W. -S.
name: Hsu, C. -L.
name: Iijima, T.
name: Inami, K.
name: Inguglia, G.
name: Ishikawa, A.
name: Iwasaki, M.
name: Iwasaki, Y.
name: Jacobs, W. W.
name: Jia, S.
name: Jin, Y.
name: Kahn, J.
name: Kaliyar, A. B.
name: Kang, K. H.
name: Karyan, G.
name: Kiesling, C.
name: Kim, C. H.
name: Kim, D. Y.
name: Kim, K. T.
name: Kim, Y. -K.
name: Kodyš, P.
name: Konno, T.
name: Korobov, A.
name: Korpar, S.
name: Kovalenko, E.
name: Križan, P.
name: Kroeger, R.
name: Krokovny, P.
name: Kumar, R.
name: Kumara, K.
name: Kwon, Y. -J.
name: Lee, S. C.
name: Li, L. K.
name: Li, S. X.
name: Li, Y. B.
name: Gioi, L. Li
name: Libby, J.
name: Lieret, K.
name: MacQueen, C.
name: Masuda, M.
name: Matvienko, D.
name: Merola, M.
name: Miyabayashi, K.
name: Mizuk, R.
name: Mohanty, G. B.
name: Mussa, R.
name: Nakao, M.
name: Natkaniec, Z.
name: Natochii, A.
name: Nayak, M.
name: Nisar, N. K.
name: Nishida, S.
name: Nishimura, K.
name: Ono, H.
name: Oskin, P.
name: Pakhlov, P.
name: Pakhlova, G.
name: Pang, T.
name: Park, S. -H.
name: Paul, S.
name: Pedlar, T. K.
name: Piilonen, L. E.
name: Podobnik, T.
name: Popov, V.
name: Prencipe, E.
name: Prim, M. T.
name: Röhrken, M.
name: Rostomyan, A.
name: Rout, N.
name: Russo, G.
name: Sahoo, D.
name: Sandilya, S.
name: Sangal, A.
name: Santelj, L.
name: Sanuki, T.
name: Savinov, V.
name: Schnell, G.
name: Schwanda, C.
name: Seino, Y.
name: Senyo, K.
name: Shapkin, M.
name: Shen, C. P.
name: Shiu, J. -G.
name: Shwartz, B.
name: Simon, F.
name: Singh, J. B.
name: Solovieva, E.
name: Starič, M.
name: Stottler, Z. S.
name: Sumihama, M.
name: Sumiyoshi, T.
name: Takizawa, M.
name: Tanida, K.
name: Tenchini, F.
name: Uchida, M.
name: Uglov, T.
name: Unno, Y.
name: Uno, S.
name: Van Tonder, R.
name: Varner, G.
name: Vinokurova, A.
name: Waheed, E.
name: Wang, C. H.
name: Wang, E.
name: Wang, M. -Z.
name: Wang, P.
name: Wang, X. L.
name: Watanuki, S.
name: Wood, L.
name: Yabsley, B. D.
name: Yan, W.
name: Ye, H.
name: Yelton, J.
name: Yin, J. H.
name: Zhang, Z. P.
name: Zhilich, V.
name: Zhukova, V.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present a search for the decays of $B^0$ mesons into a final state containing a $Λ$ baryon and missing energy. These results are obtained from a $711\text{fb}^{-1}$ data sample that contains $772 \times 10^6$ $B{\kern 0.18em}\overline{\kern -0.18em B}$ pairs and was collected near the $Υ(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We use events in which one $B$ meson is fully reconstructed in a hadronic decay mode and require the remainder of the event to consist of only a single $Λ$. No evidence for these decays is found and we set $90\%$ confidence level upper limits on the branching fractions in the range $2.1$-$3.8\times 10^{-5}$. This measurement provides the world's most restrictive limits, with implications for baryogenesis and dark matter production.
description: 8 pages, 4 figures