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Search for Lepton Number Violating Decays B+→π−μ+μ+ and B+→K−μ+μ+

By Carlos Abellan Beteta, Míriam Calvo Gómez, Alessandro Camboni, Albert Comerma Montells, Francesc Domingo Bonal, David G. d' Enterria i Adan, Lluís Garrido Beltrán, David Gascón Fora, Marc Grabalosa Gándara, Ricardo Graciani Díaz, Eugeni Graugés Pous, Elias López Asamar, Marco Musy, Antonio Pérez-Calero Yzquierdo, Eduardo Picatoste Olloqui, B. (Blai) Pie Valls, Cédric Potterat, Albert Puig Navarro, M. Roselló, Hugo (Ruiz Pérez) Ruiz, Ricard Vázquez Gómez, Xavier Vilasis-Cardona and LHCb Collaboration


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

Topics: Física de partícules, Experiments, Particle physics, Experiments
Publisher: American Physical Society
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Provided by: RECERCAT
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