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Search for B0 meson decays into Λ and missing energy with a hadronic tagging method at Belle
Date Issued
01-03-2022
Author(s)
Hadjivasiliou, C.
Fulsom, B. G.
Strube, J. F.
Adachi, I.
Aihara, H.
Asner, D. M.
Atmacan, H.
Aushev, T.
Babu, V.
Belous, K.
Bennett, J.
Bessner, M.
Bhardwaj, V.
Bhuyan, B.
Bilka, T.
Biswal, J.
Bodrov, D.
Borah, J.
Bozek, A.
BraÄ ko, M.
Branchini, P.
Browder, T. E.
Budano, A.
Campajola, M.
ÄŒervenkov, D.
Chang, M. C.
Chang, P.
Chen, A.
Cheon, B. G.
Chilikin, K.
Cho, H. E.
Choi, S. K.
Choi, Y.
Choudhury, S.
Cinabro, D.
Cunliffe, S.
Das, S.
De Pietro, G.
Di Capua, F.
DoleŽal, Z.
Dong, T. V.
Dossett, D.
Epifanov, D.
Ferber, T.
Garg, R.
Gaur, V.
Giri, A.
Goldenzweig, P.
Gu, T.
Gudkova, K.
Hayashii, H.
Hou, W. S.
Hsu, C. L.
Iijima, T.
Inami, K.
Inguglia, G.
Ishikawa, A.
Iwasaki, M.
Iwasaki, Y.
Jacobs, W. W.
Jia, S.
Jin, Y.
Kahn, J.
Kaliyar, A. B.
Kang, K. H.
Karyan, G.
Kiesling, C.
Kim, C. H.
Kim, D. Y.
Kim, K. T.
Kim, Y. K.
Kodyš, P.
Konno, T.
Korobov, A.
Korpar, S.
Kovalenko, E.
KriŽan, P.
Kroeger, R.
Krokovny, P.
Kumar, R.
Kumara, K.
Kwon, Y. J.
Lee, S. C.
Li, L. K.
Li, S. X.
Li, Y. B.
Li Gioi, L.
Indian Institute of Technology, Madras
Lieret, K.
Macqueen, C.
Masuda, M.
Matvienko, D.
Merola, M.
Miyabayashi, K.
Mizuk, R.
Mohanty, G. B.
Mussa, R.
Nakao, M.
Natkaniec, Z.
Natochii, A.
Abstract
We present a search for the decays of B0 mesons into a final state containing a Λ baryon and missing energy. These results are obtained from a 711 fb-1 data sample that contains 772×106 BB¯ pairs and was collected near the (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 2.1-3.8×10-5. This measurement provides the world's most restrictive limits, with implications for baryogenesis and dark matter production.
Volume
105