Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/221850
Title: Observation of the Bc+→J/ψπ+π0 decay
Author: Comerma Montells, Albert
Garcia Moreno, Paula
Garrido Beltrán, Lluís
Gioventù, Alessandra
Gironella Gironell, Pere
Gomez Fernandez, Sergio
Graugés Pous, Eugeni
Lobo Salvia, Aniol
López Huertas, Albert
Manera Escalero, Rafel
Marin Benito, Carla
Mauricio Ferre, Joan
Calefice, Lukas
Vazquez Gomez, Ricardo
LHCb Collaboration
Keywords: Gran Col·lisionador d'Hadrons
Hadrons
Cromodinàmica quàntica
Large Hadron Collider (France and Switzerland)
Hadrons
Quantum chromodynamics
Issue Date: 2024
Publisher: Springer Verlag
Abstract: The frst observation of the B+ c → J/ψπ+π 0 decay is reported with high signifcance 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 B+ c → J/ψπ+ channel is measured to be BB + c →J/ψπ+π0 BB + c →J/ψπ+ = 2.80 ± 0.15 ± 0.11 ± 0.16 , where the frst uncertainty is statistical, the second systematic and the third related to imprecise knowledge of the branching fractions for B+ → J/ψK∗+ and B+ c → J/ψπ+ decays, which are used to determine the π 0 detection efciency. The π +π 0 mass spectrum is found to be consistent with the dominance of an intermediate ρ + contribution in accordance with a model based on QCD factorisation. 
Note: Reproducció del document publicat a: https://doi.org/10.1007/JHEP04(2024)151
It is part of: Journal of High Energy Physics, 2024, vol. 2024, num.151
URI: https://hdl.handle.net/2445/221850
Related resource: https://doi.org/10.1007/JHEP04(2024)151
ISSN: 1126-6708
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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