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.
2026
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/174523
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