9 research outputs found
Semileptonic decay of meson into states in a QCD potential model
The slope and curvature of Isgur Wise function for meson is computed
in a QCD potential model in two different approaches of choosing the
perturbative term of the Cornell potential. Based on heavy quark effective
theory the exclusive semileptonic decay rates of meson into the $c\bar c\
(\eta_c,J/\psi)c\bar cB_{c}$ is small due to its heavy mass.Comment: 13 pages, 4 tables, 4 figures,Accepted to Int.J.Mod.Phys.
Isgur-Wise function in a QCD potential model with coulombic potential as perturbation
We study heavy light mesons in a QCD inspired quark model with the Cornell
potential. Here we consider the linear term
as the parent and i.e.the Coloumbic part as the
perturbation.The linear parent leads to Airy function as the unperturbed
wavefunction. We then use the Dalgarno method of perturbation theory to obtain
the total wavefunction corrected upto first order with Coulombic peice as the
perturbation.With these wavefunctions, we study the Isgur-Wise function and
calculate its slope and curvature.Comment: paper has been modified in Airy functions calculation upto o(r^3
Leptonic decay of Heavy-light Mesons in a QCD Potential Model
We study the masses and decay constants of heavy-light flavour mesons D, Ds,
B and Bs in a QCD Potential model. The mesonic wavefunction is used to compute
the masses of D and B mesons in the ground state and the wavefunction is
transformed to momentum space to estimate the pseudoscalar decay constants of
these mesons. The leptonic decay widths and branching ratio of these mesons for
different leptonic channels are also computed to compare with the experimental
values. The results are found to be compatible with available data.Comment: 9 pages,3 table
Oscillation frequency of B and B mesons in a QCD potential model with relativistic effect
Wavefunction at the origin with the incorporation of relativistic effect
leads to singularity in a specific potential model. To regularise the
wavefunction, we introduce a short distance scale here and use it to estimate
masses and decay constants of Bd and Bs mesons within the QCD potential
model.These values are then used to compute the oscillation frequency \Delta mB
of Bd and Bs mesons. The values are found to be in good agreement with
experiment and other theoretical values.Comment: 10 page
Parameterisation space for Cornell potential in a QCD potential model
We make a critical analysis on the free parameters of the Cornell potential and provide a parameterisation space for the strong coupling constant and the constant shift ‘c’ for choosing linear part as perturbation in the potential model. In the analysis of heavy-light mesons , we have found a wide range of values for the coupling constant i.e with which can be used to treat the confining part as perturbation