Importance of Nonperturbative QCD Parameters for Bottom Mesons

الملخص EN

The importance of nonperturbative quantum chromodynamics (QCD) parameters is discussed in context to the predicting power for bottom meson masses and isospin splitting.

In the framework of heavy quark effective theory, the work presented here focuses on the different allowed values of the two nonperturbative QCD parameters used in heavy quark effective theory formula, and using the best fitted parameter, masses of the excited bottom meson states in j p = 1 / 2 + doublet in strange and nonstrange sectors are calculated here.

The calculated masses are found to be matching well with experiments and other phenomenological models.

The mass splitting and hyperfine splitting have also been analyzed for both strange and nonstrange heavy mesons with respect to spin and flavor symmetries.