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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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