• Slope and curvature of Isgur–Wise function using variationally improved perturbation theory in a quantum chromodynamics inspired potential model

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/075/03/0423-0438

• # Keywords

Variationally improved perturbation theory; Isgur–Wise function; charge radii; convexity parameter.

• # Abstract

We used variationally improved perturbation theory (VIPT) in calculating the slope and curvature of Isgur–Wise (I–W) function with the Cornell potential $− \dfrac{4\alpha_{s}}{3r} br + c$ instead of the usual stationary state perturbation theory as done earlier. We used $−(4\alpha_{s} /3r)$, i.e. the Coulombic potential, as the parent and the linear one, i.e. $br +c$ as the perturbed potential in the theory and calculated the slope and curvature of Isgur–Wise function including three states in the summation involved in the first-order correction to wave function in the method.

• # Author Affiliations

1. Department of Physics, Pandu College, Guwahati 781 012, India
2. Department of Physics, Gauhati University, Guwahati 781 014, India

• # Pramana – Journal of Physics

Volume 96, 2022
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Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019