Search for baryon-number and lepton-number violating decays of Λ hyperons using the CLAS detector at Jefferson Laboratory
Journal
Physical Review D - Particles, Fields, Gravitation and Cosmology
Date Issued
2015-10-09
Author(s)
McCracken, M. E.
Bellis, M.
Adhikari, K. P.
Adikaram, D.
Akbar, Z.
Pereira, S. Anefalos
Badui, R. A.
Ball, J.
Baltzell, N. A.
Battaglieri, M.
Batourine, V.
Bedlinskiy, I.
Biselli, A. S.
Boiarinov, S.
Briscoe, W. J.
Burkert, V. D.
Cao, T.
Carman, D. S.
Celentano, A.
Chandavar, S.
Charles, G.
Colaneri, L.
Cole, P. L.
Contalbrigo, M.
Cortes, O.
Crede, V.
D'Angelo, A.
Dashyan, N.
De Vita, R.
De Sanctis, E.
Deur, A.
Djalali, C.
Dodge, G. E.
Dupre, R.
Fassi, L. El
Elouadrhiri, E.
Eugenio, P.
Fedotov, G.
Fegan, S.
Fersch, R.
Filippi, A.
Fleming, J. A.
Garillon, B.
Gevorgyan, N.
Gilfoyle, G. P.
Giovanetti, K. L.
Girod, F. X.
Golovatch, E.
Gothe, R. W.
Griffioen, K. A.
Guidal, M.
Guo, L.
Hafidi, K.
Hanretty, C.
Hattawy, M.
Hicks, K.
Holtrop, M.
Hughes, S. M.
Ilieva, Y.
Ireland, D. G.
Ishkhanov, B. S.
Isupov, E. L.
Jenkins, D.
Jiang, H.
Jo, H. S.
Keller, D.
Khachatryan, G.
Khandaker, M.
Kim, A.
Kim, W.
Klein, A.
Klein, F. J.
Kubarovsky, V.
Lenisa, P.
Livingston, K.
Lu, H. Y.
Macgregor, I. J.D.
Mayer, M.
McKinnon, B.
Mestayer, M. D.
Meyer, C. A.
Mirazita, M.
Mokeev, V.
Moody, C. I.
Moriya, K.
Camacho, C. Munoz
Nadel-Turonski, P.
Net, L. A.
Niccolai, S.
Osipenko, M.
Ostrovidov, A. I.
Park, K.
Pasyuk, E.
Pisano, S.
Pogorelko, O.
Price, J. W.
Procureur, S.
DOI
10.1103/PhysRevD.92.072002
Abstract
We present a search for ten baryon-number violating decay modes of Λ hyperons using the CLAS
detector at Jefferson Laboratory. Nine of these decay modes result in a single meson and single
lepton in the final state (Λ → m`) and conserve either the sum or the difference of baryon and
lepton number (B ±L). The tenth decay mode (Λ → pπ¯
+) represents a difference in baryon number
of two units and no difference in lepton number. We observe no significant signal and set upper limits
on the branching fractions of these reactions in the range (4 − 200) × 10−7
at the 90% confidence
level.
detector at Jefferson Laboratory. Nine of these decay modes result in a single meson and single
lepton in the final state (Λ → m`) and conserve either the sum or the difference of baryon and
lepton number (B ±L). The tenth decay mode (Λ → pπ¯
+) represents a difference in baryon number
of two units and no difference in lepton number. We observe no significant signal and set upper limits
on the branching fractions of these reactions in the range (4 − 200) × 10−7
at the 90% confidence
level.
Subjects
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