2026-04-14T00:05:51Zhttps://recercat.cat/oai/request

oai:recercat.cat:20.500.14342/33092025-03-11T04:12:27Zcom_2072_482405com_2072_183628col_2072_482415

Search for Lepton Number Violating Decays B+→π−μ+μ+ and B+→K−μ+μ+ Calvo Gómez, Míriam Camboni, Alessandro Vilasís Cardona, Xavier LHCb Collaboration - CERN Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) A search is performed for the lepton number violating decay B+→h−μ+μ+, where h− represents a K− or a π−, using an integrated luminosity of 36  pb−1 of data collected with the LHCb detector. The decay is forbidden in the standard model but allowed in models with a Majorana neutrino. No signal is observed in either channel and limits of B(B+→K−μ+μ+)<5.4×10−8 and B(B+→π−μ+μ+)<5.8×10−8 are set at the 95% confidence level. These improve the previous best limits by factors of 40 and 30, respectively. 2025-03-11T04:12:27Z 2025-03-11T04:12:27Z 2025-03-11T04:12:27Z 2012-03-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.14342/3309 https://doi.org/10.1103/PhysRevLett.108.101601 eng Physical Review Letters, 2012, Vol. 108, No. 10 (Març) http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Attribution 4.0 International © CERN American Physical Society