DecayBs→ϕℓ+ℓ−in covariant quark model

Theoretical description of the decays Λb→Λ(*)(Gutsche1, Ivanov2, Körner3 et al. 2017Phys. Rev. D370432View full textAdd to dashboardCite

“…The model parameters are the constituent quark masses m q and the infrared cutoff parameter λ responsible for quark confinement. They are taken from a new fit done and used in our papers on the semileptonic B → D ( * ) ν decays [22][23][24][25], rare B → M¯ decays [26][27][28], the semileptonic decays [29,30] and for the calculation of nucleon tensor form factors [31]. The best fit values for the constituent quark masses and the infrared cutoff parameter λ are…”

Study of Bs→K(*)ℓ+ℓ− decays in the PQCD factorization approach with lattice QCD i

“…The semileptonic decay B s → φµ + µ − , which is closely relevant to the decay B → K * µ + µ − , offers an alternative scene to check out the same fundamental quark process, in a different hadronic background. On the theoretical side, various studies on the quark level b → s transition and the exclusive B (s) → V ℓ + ℓ − decays by using rather different theories or models have been performed within the SM, such as the constituent quark model or covariant quark model [15,16], the light front quark model [17], the QCD factorization (QCDF) [18] and the light-cone sum rule (LCSR) [19][20][21][22][23], and beyond the SM, such as the universal extra dimension [24,25] and the supersymmetric theory [26]. On the experimental side, the B s → φµ + µ − decay mode was first observed and studied by the CDF collaboration [27] and subsequently by the LHCb collaboration [28,29].…”

B → ρ decay form factors from covariant confined quark model

“…More details concerning the model can be found in our previous papers [10,11]. Below, we list the definitions of the dimensionless invariant transition form factors together with the covariant quark model expressions that allow one to calculate them.…”

“…Below, we list the definitions of the dimensionless invariant transition form factors together with the covariant quark model expressions that allow one to calculate them. We closely follow the notation used in previous papers [10,12].…”