Study of Bc+?J/?Ds+ and Bc+?J/?Ds?+ decays in pp collisions at ?s = 13 TeV with the ATLAS detector
Yükleniyor...
Dosyalar
Tarih
2022-08
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Science and Business Media Deutschland GmbH
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Abstract: A study of Bc+?J/?Ds+ and Bc+?J/?Ds?+ decays using 139 fb?1 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/??+ decay are measured: B(Bc+?J/?Ds+)/B(Bc+?J/??+) = 2.76 ± 0.47 and B(Bc+?J/?Ds?+)/B(Bc+?J/??+) = 5.33 ± 0.96. The ratio of the branching fractions of the two decays is found to be B(Bc+?J/?Ds?+)/B(Bc+?J/?Ds?+) = 1.93 ± 0.26. For the Bc+?J/?Ds?+ decay, the transverse polarization fraction, ?±±/?, 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.]. © 2022, The Author(s).
Açıklama
Anahtar Kelimeler
B Physics, Hadron-Hadron Scattering
Kaynak
Journal of High Energy Physics
WoS Q Değeri
Q2
