2026-04-14T03:25:19Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2206222025-11-21T05:26:13Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

Search for the lepton-flavour violating decays B 0 → K *0 μ ± e ∓ and Bs0 → ϕμ ± e ∓ Aaij, R. Alfonso Albero, Alejandro Garcia Moreno, Paula Garrido Beltrán, Lluís Gironella Gironell, Pere Gomez Fernandez, S. Graugés Pous, Eugeni Lobo Salvia, Aniol Marin Benito, Carla Mauricio, J. Vazquez Gomez, Ricardo LHCb Collaboration Física de partícules Hadrons Particle physics Hadrons A search for the lepton-flavour violating decays B0 → K∗0µ ±e ∓ and B0 s → φµ±e ∓ is presented, using proton-proton collision data collected by the LHCb detector at the LHC, corresponding to an integrated luminosity of 9 fb−1 . No significant signals are observed and upper limits of B(B 0→ K∗0µ +e −) < 5.7 × 10−9 (6.9 × 10−9 ), B(B 0→ K∗0µ −e +) < 6.8 × 10−9 (7.9 × 10−9 ), B(B 0→ K∗0µ ±e ∓) < 10.1 × 10−9 (11.7 × 10−9 ), B(B 0 s → φµ±e ∓) < 16.0 × 10−9 (19.8 × 10−9 ) are set at 90% (95%) confidence level. These results constitute the world’s most stringent limits to date, with the limit on the decay B0 s → φµ±e ∓ the first being set. In addition, limits are reported for scalar and left-handed lepton-flavour violating New Physics scenarios.  2025-04-25T12:33:10Z 2025-04-25T12:33:10Z 2023 2025-04-25T12:33:10Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1126-6708 https://hdl.handle.net/2445/220622 757735 eng Reproducció del document publicat a: https://doi.org/10.1007/JHEP06(2023)073 Journal of High Energy Physics, 2023, vol. 2023, num.73, p. 1-25 https://doi.org/10.1007/JHEP06(2023)073 cc-by (c) Aaij, R. et al., 2023 http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 25 p. application/pdf application/pdf Springer Verlag Articles publicats en revistes (Física Quàntica i Astrofísica)