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.

Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., et al. (2024). Search for the baryon number and lepton number violating decays τ−→Λπ− and τ−→Λ¯π− at Belle II. PHYSICAL REVIEW D, 110(11), 112003-1-112003-8 [10.1103/physrevd.110.112003].

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

Branchini, P.
Membro del Collaboration Group
;
Budano, A.
Membro del Collaboration Group
;
Bussino, S.
Membro del Collaboration Group
;
De Pietro, G.
Membro del Collaboration Group
;
Laurenza, M.
Membro del Collaboration Group
;
Martellini, C.
Membro del Collaboration Group
;
Martini, A.
Membro del Collaboration Group
;
Rizzo, G.;
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
Adachi, I., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Aloisio, A., et al. (2024). Search for the baryon number and lepton number violating decays τ−→Λπ− and τ−→Λ¯π− at Belle II. PHYSICAL REVIEW D, 110(11), 112003-1-112003-8 [10.1103/physrevd.110.112003].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/503036
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