Exclusive semileptonic [Formula omitted]-meson decays to radially excited charmonium and charm meson states

• Published in: The European physical journal. C, Particles and fields Vol. 82; no. 8
• Main Authors: Nayak, Lopamudra, Dash, P. C, Kar, S, Barik, N
• Format: Journal Article
• Language: English
• Published: Springer 01.08.2022
• Subjects: Quarks
• ISSN: 1434-6044
• DOI: 10.1140/epjc/s10052-022-10724-z

In the wake of recent measurements of ratios of semileptonic branching fractions: [Formula omitted] and [Formula omitted] reported by the LHCb, BELLE and HFLAV Collaborations, we calculate invariant form factors for the exclusive semileptonic [Formula omitted]-meson decays to radially excited charmonium and charm meson states in the full kinematical region within the framework of relativistic independent quark (RIQ) model. We evaluate the lepton mass effect in the decay processes induced by [Formula omitted] transition at the quark level. Our predictions on branching fractions for [Formula omitted] are found [Formula omitted] and that for [Formula omitted] are [Formula omitted] in their [Formula omitted] decay modes, which lie within the detection accuracy of current experiment. Our predictions on branching fractions, forward backward asymmetry and asymmetry parameter are found in reasonable agreement with other model predictions; which can hopefully be tested in future experiments at LHC and Tevatron. Our predicted observable [Formula omitted] in this sector are found comparable to other standard model (SM) predictions that violate the lepton flavor universality hinting at new physics beyond SM.