Slope and curvature of Isgur-Wise function using variationally improved perturbation theory in a quantum chromodynamics inspired potential model |
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Authors: | Bhaskar Jyoti Hazarika and D. K. Choudhury |
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Affiliation: | 1.Department of Physics,Pandu College,Guwahati,India;2.Department of Physics,Gauhati University,Guwahati,India |
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Abstract: | We used variationally improved perturbation theory (VIPT) in calculating the slope and curvature of Isgur-Wise (I-W) function with the Cornell potential −$
frac{{4alpha _s }}
{{3r}}
$
frac{{4alpha _s }}
{{3r}}
+br + c instead of the usual stationary state perturbation theory as done earlier. We used −(4α 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. |
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Keywords: | |
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