Coupling constants calculation of charmed meson with kaon from QCD sum rules

2019/08/05 by Seyedhabashy, M. R., Kazemi, E., Janbazi, M. +1
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1908.01810

Abstract

In this research, the strong coupling constants of the D^*D_s^*K, D₁D_s1K, D^*D_sK and D₁D_s0^*K vertices are evaluated, using the three-point QCD sum rules. In order to calculate the coupling constant of each vertex, either the kaon or the charmed meson is considered as the off-shell particle. The basic g parameter, in the heavy quark effective theory, is related to the coupling constants of D^*D_s^*K and D^*D_sK. Our obtained value for g parameter is 0.24± 0.09, which is in good agreement with the lower limits of the other existing predictions.

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