Abstract
We study the exclusive semileptonic rare Bc+→D+νν¯ decay in the framework of light-cone quark model. The transition form factors f+(q2) and fT(q2) are evaluated in the timelike region using the analytic continuation method in q+=0 frame. The analytic solutions of these form factors are compared with the results obtained from the double pole parametric form. The branching ratio for Bc+→D+νν¯ decay is calculated and compared with the other theoretical model predictions. The predicted results in this model can be tested at the LHCb experiments in near future which will help in testing the unitarity of CKM quark mixing matrix, thus providing an insight into the phenomenon of CP violation.
Highlights
In the past few years, great progress has been made in understanding the semileptonic decays in the B sector as these are among the cleanest probes of the flavor sector of the Standard Model (SM) which provide valuable information to explore the SM and are powerful means for probing different new physics (NP) scenarios beyond the SM (BSM) [1,2,3]
We present the analytic solutions of the form factors f+ and f푇 for 0 ≤ q2 ≤ (M퐵c+ − M퐷+ )2 in Figures 2 and 3, respectively
We have studied D+]] decay within the the exclusive semileptonic framework of light-cone quark model (LCQM)
Summary
In the past few years, great progress has been made in understanding the semileptonic decays in the B sector as these are among the cleanest probes of the flavor sector of the Standard Model (SM) which provide valuable information to explore the SM and are powerful means for probing different new physics (NP) scenarios beyond the SM (BSM) [1,2,3]. Due to the Glashow-Iliopoulos-Maiani (GIM) mechanism [4], flavor changing neutral current (FCNC) induced semileptonic B decays are rare in the SM because these decays are forbidden at tree level and can proceed at the lowest order only via electroweak penguin and box diagrams [5, 6] These decay processes provide sensitive probes to look into physics BSM [7]. The theoretical analysis of CP violating effects in rare semileptonic B decays requires knowledge of the transition form factors that are model dependent quantities and are scalar functions of the square of momentum transfer [10] These form factors interrelate to the decay rates and branching ratios of all the observed decay modes of B mesons and their calculation requires a nonperturbative treatment.
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