We present a search for the baryon number B and lepton number L violating decays τ-→Λπ- and τ-→Λ¯π- produced from the e+e-→τ+τ- process, using a 364 fb-1 data sample collected by the Belle II experiment at the SuperKEKB collider. No evidence of signal is found in either decay mode, which have |Δ(B-L)| equal to 2 and 0, respectively. Upper limits at 90% credibility level on the branching fractions of τ-→Λπ- and τ-→Λ¯π- are determined to be 4.7×10-8 and 4.3×10-8, respectively.

Search for the baryon number and lepton number violating decays τ− → Λπ− and τ− → Λ¯π− at Belle II

Bianchi, F.;Biswas, D.;Boschetti, A.;Destefanis, M.;Maggiora, M.;Marcello, S.;Mussa, R.;Spataro, S.;Tamponi, U.;
2024-01-01

Abstract

We present a search for the baryon number B and lepton number L violating decays τ-→Λπ- and τ-→Λ¯π- produced from the e+e-→τ+τ- process, using a 364 fb-1 data sample collected by the Belle II experiment at the SuperKEKB collider. No evidence of signal is found in either decay mode, which have |Δ(B-L)| equal to 2 and 0, respectively. Upper limits at 90% credibility level on the branching fractions of τ-→Λπ- and τ-→Λ¯π- are determined to be 4.7×10-8 and 4.3×10-8, respectively.
2024
110
11
112003-1
112003-8
Tau physics; baryon number violating decays; lepton number violating decays
Adachi, I.; Aggarwal, L.; Ahmed, H.; Aihara, H.; Akopov, N.; Aloisio, A.; Althubiti, N.; Anh Ky, N.; Asner, D. M.; Atmacan, H.; Aushev, T.; Aushev, V....espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2069433
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