Search for lepton-number- And baryon-number-violating tau decays at Belle

Authors

D. Sahoo, Tata Institute of Fundamental Research, Mumbai
G. B. Mohanty, Tata Institute of Fundamental Research, Mumbai
K. Trabelsi, Universite Paris-Saclay
I. Adachi, The Graduate University for Advanced Studies
K. Adamczyk, Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
H. Aihara, The University of Tokyo
S. Al Said, King Abdulaziz University
D. M. Asner, Brookhaven National Laboratory
T. Aushev, National Research University Higher School of Economics
R. Ayad, University of Tabuk
T. Aziz, Tata Institute of Fundamental Research, Mumbai
V. Babu, Deutsches Elektronen-Synchrotron (DESY)
S. Bahinipati, Indian Institute of Technology Bhubaneswar
P. Behera, Indian Institute of Technology Madras
J. Bennett, University of Mississippi
M. Bessner, University of Hawaiʻi at Mānoa
V. Bhardwaj, Indian Institute of Science Education and Research Mohali
T. Bilka, Charles University
J. Biswal, Jozef Stefan Institute
G. Bonvicini, Wayne State University
A. Bozek, Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
M. Bračko, Jozef Stefan Institute
T. E. Browder, University of Hawaiʻi at Mānoa
M. Campajola, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
L. Cao, Universität Bonn
D. Červenkov, Charles University
M. C. Chang, Fu Jen Catholic University
P. Chang, National Taiwan University
V. Chekelian, Max Planck Institute for Physics (Werner Heisenberg Institute)
A. Chen, National Central University Taiwan
B. G. Cheon, Hanyang University
K. Chilikin, P.N. Lebedev Physical Institute of the Russian Academy of Sciences

Document Type

Article

Publication Date

12-24-2020

Abstract

© 2020 authors. Published by the American Physical Society. We search for lepton-number- and baryon-number-violating decays τ-→p¯e+e-, pe-e-, p¯e+μ-, p¯e-μ+, p¯μ+μ-, and pμ-μ- using 921 fb-1 of data, equivalent to (841±12)×106 τ+τ- events, recorded with the Belle detector at the KEKB asymmetric-energy e+e- collider. In the absence of a signal, 90% confidence-level upper limits are set on the branching fractions of these decays in the range (1.8-4.0)×10-8. We set the world's first limits on the first four channels and improve the existing limits by an order of magnitude for the last two channels.

Relational Format

journal article

Recommended Citation

Sahoo, D., Mohanty, G. B., Trabelsi, K., Adachi, I., Adamczyk, K., Aihara, H., Al Said, S., Asner, D. M., Aushev, T., Ayad, R., Aziz, T., Babu, V., Bahinipati, S., Behera, P., Bennett, J., Bessner, M., Bhardwaj, V., Bilka, T., Biswal, J., … Belle Collaboration. (2020). Search for lepton-number- and baryon-number-violating tau decays at Belle. Physical Review D, 102(11), 111101. https://doi.org/10.1103/PhysRevD.102.111101