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.| File | Dimensione | Formato | |
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JHEP04(2024)151.pdf
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