Study of the B+ → π+μ+μ− decay with the LHCb experiment

Abstract

In this work, a study of the B+ → π+μ+μ− decay is performed in the new data collected during Run 3 of the LHCb experiment. A Boosted Decision Tree (BDT) algorithm is used to select the events corresponding to this decay and mass fits are performed to extract its yield. The B+ → π+J/ψ(→ μ+μ−) decay is used as a control channel. Using the yield of the control channel, the expected signal yield is found to be 1.64±0.22. No signal events have been found by performing a fit directly, which is compatible with the expectations.