1. Evidence for the decay B0S→K¯∗0μ+μ−
- Author
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LHCb Collaboration, Adeva Andany, Bernardo, Boente García, Óscar, Chobanova, Veronika, Cid Vidal, Xabier, Dosil Suárez, Álvaro, Fernández Prieto, Antonio, Gallas Torreira, Abraham Antonio, García Plana, Beatriz, Lucio Martínez, Miriam, Martínez Santos, Diego, Plo Casasus, Máximo, Prisciandaro, James J., Ramos Pernas, Miguel, Romero Vidal, Antonio, Saborido Silva, Juan José, Sanmartín Sedes, Brais, Santamarina Ríos, Cibrán, Vázquez Regueiro, Pablo, Vieites Díaz, María, Universidade de Santiago de Compostela. Departamento de Física de Partículas, and Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE)
- Subjects
FCNC Interaction ,Flavor physics ,Rare decay ,Hadron-Hadron scattering (experiments) ,B physics - Abstract
A search for the decay B0S→K¯∗0μ+μ− is presented using data sets corresponding to 1.0, 2.0 and 1.6 fb−1 of integrated luminosity collected during pp collisions with the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, respectively. An excess is found over the background-only hypothesis with a significance of 3.4 standard deviations. The branching fraction of the B0S→K¯∗0μ+μ− decay is determined to be B(B0s→K¯∗0μ+μ−)=[2.9±1.0(stat)±0.2(syst)±0.3(norm)]×10−8, where the first and second uncertainties are statistical and systematic, respectively. The third uncertainty is due to limited knowledge of external parameters used to normalise the branching fraction measurement. SI
- Published
- 2018