The first evidence for the decay B+->pi+e+e- is reported using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb-1. A signal excess with a significance of 3.2sigma is observed and the branching fraction is measured to be B(B+->pi+e+e-)=(2.4-0.8+0.9 -0.2+0.4)x10-8, where the first set of uncertainties is statistical and the second is systematic. The result is consistent with the Standard Model expectation.
First Evidence of the Decay $B^+ \to \pi^+e^+e^-$
Celestino I.Membro del Collaboration Group
;Cordova G.Membro del Collaboration Group
;Kleijne N.Membro del Collaboration Group
;Morello M. J.Membro del Collaboration Group
;Passaro D.Membro del Collaboration Group
;Pica L.Membro del Collaboration Group
;Riccardi D.Membro del Collaboration Group
;Xu A.Membro del Collaboration Group
;
2026
Abstract
The first evidence for the decay B+->pi+e+e- is reported using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb-1. A signal excess with a significance of 3.2sigma is observed and the branching fraction is measured to be B(B+->pi+e+e-)=(2.4-0.8+0.9 -0.2+0.4)x10-8, where the first set of uncertainties is statistical and the second is systematic. The result is consistent with the Standard Model expectation.File in questo prodotto:
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