Abstract
Using the Gaussian wave function mass spectra and decay rates of b¯ b me- son are investigated in the framework of phenomenological quark anti-quark potential (coulomb plus power) model consisting of relativistic corrections to the kinetic energy term. The spin-spin, spin-orbit and tensor interactions are employed to obtain the pseu- doscalar and vector meson masses. The decay constantsfP/Vare computed using the wave function at the origin. The di-gamma and di-leptonic decays of the b¯ b meson are investigated using Van-Rayan Weisskopf formula as well as in the NRQCD formalism.
Highlights
A days, there have been renewed interest in the spectroscopy of the light and heavy flavoured hadrons due to number of experimental facilities CLEO, DELPHI, Belle, BaBar, LHCb etc., which have been continuously providing more accurate and new information about the mesons, baryons and exotic states from light flavour to heavy flavour sector [1,2,3,4]
The success of theoretical model predictions with experiments can provide important information about the quark-antiquark interactions. Such information is of great interest, as it is not possible to obtain the QQpotential starting from the basic principle of the quantum chromodynamics (QCD) at the hadronic scale [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23]
In section-4 we present the details of the computations of the di-gamma decays of pseudoscalar states and the di-leptonic decay widths of the vector states of the bbquarkonia in the frame work of the NRQCD formalism as well as in the conventional Van-Royen Weisskopf formula
Summary
There have been renewed interest in the spectroscopy of the light and heavy flavoured hadrons due to number of experimental facilities CLEO, DELPHI, Belle, BaBar, LHCb etc., which have been continuously providing more accurate and new information about the mesons, baryons and exotic states from light flavour to heavy flavour sector [1,2,3,4]. The success of theoretical model predictions with experiments can provide important information about the quark-antiquark interactions. Such information is of great interest, as it is not possible to obtain the QQpotential starting from the basic principle of the quantum chromodynamics (QCD) at the hadronic scale [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23].
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