Study of Bc+→J/ψDs+ and Bc+→J/ψDs∗+ decays in pp collisions at √s = 13 TeV with the ATLAS detector

A study of Bc+→J/ψDs+ and Bc+→J/ψDs∗+ decays using 139 fb of integrated luminosity collected with the ATLAS detector from s = 13 TeV pp collisions at the LHC is presented. The ratios of the branching fractions of the two decays to the branching fraction of the Bc+→ J/ψπ decay are measured: B(Bc+→J/ψ...

ver descrição completa

Detalhes bibliográficos
Autores: Amos, K.R., Aparisi, Pozo, J.A., Bailey, A.J., Cabrera, Susana, Cardillo, Fabio, Castillo Gimenez, M. V., Costa, María José, Didenko, Mariia, Escobar, Carlos, Estrada, Oscar, Fiorini, L., Fullana, Esteban, Fuster, Juan, García García, Carmen, García Navarro, José Enrique, González de la Hoz, Santiago, Gonzalvo Rodríguez, Galo Rafael, Guerrero Rojas, J.G.R., Higón, Emilio, Lacasta Llácer, Carlos, Lozano Bahilo, José J., Mamuzic, Judita, Martí García, Salvador, Martinez Agullo, Pablo, Miralles López, Marcos, Mitsou, Vasiliki A., Monsonis Romero, Luis, Moreno Llácer, María, Navarro Gonzalez, Josep, Poveda, Joaquín, Prades Ibañez, Alberto, Ruiz Martínez, Arantxa, Sabatini, Paolo, Salt, José, Sanchez Sebastian, Victoria, Sayago Galvan, Ivan, Soldevila, Urmila, Sánchez Martínez, Javier, Torró Pastor, Emma, Valero, Alberto, Valls Ferrer, Juan Antonio, Villaplana Pérez, Miguel, Vos, Marcel, ATLAS Collaboration
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/359364
Acesso em linha:http://hdl.handle.net/10261/359364
Access Level:acceso abierto
Descrição
Resumo:A study of Bc+→J/ψDs+ and Bc+→J/ψDs∗+ decays using 139 fb of integrated luminosity collected with the ATLAS detector from s = 13 TeV pp collisions at the LHC is presented. The ratios of the branching fractions of the two decays to the branching fraction of the Bc+→ J/ψπ decay are measured: B(Bc+→J/ψDs+)/B(Bc+→J/ψπ+) = 2.76 ± 0.47 and B(Bc+→J/ψDs∗+)/B(Bc+→J/ψπ+) = 5.33 ± 0.96. The ratio of the branching fractions of the two decays is found to be B(Bc+→J/ψDs∗+)/B(Bc+→J/ψDs∗+) = 1.93 ± 0.26. For the Bc+→J/ψDs∗+ decay, the transverse polarization fraction, Γ/Γ, is measured to be 0.70 ± 0.11. The reported uncertainties include both the statistical and systematic components added in quadrature. The precision of the measurements exceeds that in all previous studies of these decays. These results supersede those obtained in the earlier ATLAS study of the same decays with s = 7 and 8 TeV pp collision data. A comparison with available theoretical predictions for the measured quantities is presented. [Figure not available: see fulltext.].