We present the first search for the lepton-flavor-violating decay modes B0→KS0 \tau\pm \ell\mp (\ell=μ,e) using the 711 and 365 fb-1 data samples recorded by the Belle and Belle II detectors, respectively. We use a hadronic B-tagging technique to fully reconstruct a B meson and search for signal decays in the system recoiling against the tagged meson, considering \tau decays to either light leptons, one charged hadron, or one charged hadron and a neutral pion. We find no evidence for B0→KS0 \tau\pm \ell\mp decays and set 90% confidence level upper limits on the branching fractions in the range of [0.8,3.6]×10-5.

Search for Lepton-Flavor-Violating Decay Modes B0 → KS0 \tau\pm \ell\mp with Hadronic B Tagging at Belle and Belle II / Adachi, I., Adamczyk, K., Aggarwal, L., Ahmed, H., Aihara, H., Akopov, N., Alhakami, M., Aloisio, A., Althubiti, N., Ky, N.A., Asner, D. m., Atmacan, H., Aushev, V., Aversano, M., Ayad, R., Babu, V., Bae, H., Baghel, N. k., Bahinipati, S., Bambade, P., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 135/2025:4(2025), pp. 041801.1-041801.8. [10.1103/yzvh-v3hm]

Search for Lepton-Flavor-Violating Decay Modes B0 → KS0 \tau\pm \ell\mp with Hadronic B Tagging at Belle and Belle II

Dorigo, M.;Gabrielli, A.;Ganiev, E.;Ghosh, D.;Lanceri, L.;Manfredi, R.;Mantovano, M.;Raiz, S.;Vitale, L.;
2025-01-01

Abstract

We present the first search for the lepton-flavor-violating decay modes B0→KS0 \tau\pm \ell\mp (\ell=μ,e) using the 711 and 365 fb-1 data samples recorded by the Belle and Belle II detectors, respectively. We use a hadronic B-tagging technique to fully reconstruct a B meson and search for signal decays in the system recoiling against the tagged meson, considering \tau decays to either light leptons, one charged hadron, or one charged hadron and a neutral pion. We find no evidence for B0→KS0 \tau\pm \ell\mp decays and set 90% confidence level upper limits on the branching fractions in the range of [0.8,3.6]×10-5.
File in questo prodotto:
File Dimensione Formato  
yzvh-v3hm.pdf

accesso aperto

Tipologia: Documento in Versione Editoriale
Licenza: Creative commons
Dimensione 454.41 kB
Formato Adobe PDF
454.41 kB Adobe PDF Visualizza/Apri
supp.pdf

accesso aperto

Descrizione: Supplementary material
Tipologia: Altro materiale allegato
Licenza: Creative commons
Dimensione 739.6 kB
Formato Adobe PDF
739.6 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/3121559
Citazioni
  • ???jsp.display-item.citation.pmc??? 1
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 0
social impact