A search for the decay BS0→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 BS0→K¯∗0μ+μ− decay is determined to be ℬ(Bs0→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.

Язык оригиналаанглийский
Номер статьи20
Число страниц24
ЖурналJournal of High Energy Physics
Номер выпуска7
СостояниеОпубликовано - 1 июл. 2018


Подробные сведения о темах исследования «Evidence for the decay BS0→K¯∗0 μ+ μ−». Вместе они формируют уникальный семантический отпечаток (fingerprint).