Isgur-Wise function in a QCD inspired potential model with confinement as parent in the Variationally Improved Perturbation Theory (VIPT)

TL;DR

This paper recalculates the Isgur-Wise function's slope and curvature using VIPT with a linear potential as the main term, offering a new perspective on QCD-inspired models.

Contribution

It introduces a novel approach by selecting the linear potential as the parent in VIPT, contrasting previous Coulombic-based methods.

Findings

Revised slope and curvature values of the Isgur-Wise function.

Insights into charge radii and convexity parameters within the model.

Comparison of results with previous Coulombic-based calculations.

Abstract

We have recently reported the calculation of slope and curvature of Isgur-Wise function based on Variationally Improved Perturbation Theory (VIPT) in a QCD inspired potential model. In that work, Coulombic potential was taken as the parent while the linear one as the perturbation.In this work, we choose the linear one as the parent with Coulombic one as the perturbation and see the consequences. Keywords: VIPT,Isgur-Wise function, charge radii and convexity pa- rameter.