Abstract
Wepresent the branching fractions for the leptonic and semileptonic decays for l = e ,µ,τ and for l = e ,µ. We use the covariant confined quark model with built-in infrared confinement for computation of required transition form factors in the whole physical range of momentum transfer. Our results on the leptonic decays are found to agree well with the available experimental data. We obtain the following results for the semileptonicbranching fractions of mesons: ℬ( 2.85% and ℬ() = 2.70 %. The ratios of branching fractions are found to be ℬ(/ ℬ() = 0.95 which is consistent with the recent BESIIIdata.
Highlights
With the advancement of detector and accelerator technology updated and accurate results are available
We have been able to compute the form factors and semileptonic decay widths for D → (K, π)l+νl channel [19] and the same was found consistent with recent BESIII data [20]
In Tab. 1, we present our results on leptonic branching fractions for l = e, μ, τ
Summary
With the advancement of detector and accelerator technology updated and accurate results are available. The branching fraction for leptonic decays of Ds meson (D+s → l+νl) was reported by CLEO [2,3,4], BABAR [5], Belle [6] and BESIII [7] collaborations. BESIII collaboration have reported the most precise results on leptonic decay constant from the leptonic branching fraction for the channel Ds → μ+νμ [8]. We have been able to compute the form factors and semileptonic decay widths for D → (K, π)l+νl channel [19] and the same was found consistent with recent BESIII data [20]. One of the key feature of the CCQM is the computation of form factors in the entire physical range of momentum transfer This method is applicable to hadronic system with any number of quark. This approach has been successfully employed in studing the decay properties of B(s) mesons [25,26,27,28], baryons [29,30,31] and exotic states [32,33,34]
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