The first observation of the Bc+->J/Psipi+pi0 decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of 9 fb-1, collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV. The ratio of its branching fraction relative to the Bc+-->J/Psipi+ channel is measured to be (Formula presented.) where the first uncertainty is statistical, the second systematic and the third related to imprecise knowledge of the branching fractions for B+ -> J/PsiK*+ and Bc+->J/Psipi+ decays, which are used to determine the pi0 detection efficiency. The pi+pi0 mass spectrum is found to be consistent with the dominance of an intermediate rho+ contribution in accordance with a model based on QCD factorisation.

Observation of the Bc+->J/Psipi+pi0 decay

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
;
Ribatti R.
Membro del Collaboration Group
;
Riccardi D.
Membro del Collaboration Group
;
2024

Abstract

The first observation of the Bc+->J/Psipi+pi0 decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of 9 fb-1, collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV. The ratio of its branching fraction relative to the Bc+-->J/Psipi+ channel is measured to be (Formula presented.) where the first uncertainty is statistical, the second systematic and the third related to imprecise knowledge of the branching fractions for B+ -> J/PsiK*+ and Bc+->J/Psipi+ decays, which are used to determine the pi0 detection efficiency. The pi+pi0 mass spectrum is found to be consistent with the dominance of an intermediate rho+ contribution in accordance with a model based on QCD factorisation.
2024
Settore FIS/01 - Fisica Sperimentale
Settore PHYS-01/A - Fisica sperimentale delle interazioni fondamentali e applicazioni
B Physics; Hadron-Hadron Scattering; QCD; Spectroscopy
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/154025
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