Abstract
We present a U(4)R × U(4)L chirally symmetric model, which in addition to scalar and pseudoscalar mesons also includes vector and axial-vector mesons. A part from the three new parameters pertaining to the charm degree of freedom, the parameters of the model are fixed from the Nf = 3 flavor sector. We calculate open charmed meson masses and the weak decay constants of nonstrange open charm D and strange open charm DS. We also evaluate the (OZI-dominant) strong decays of open charmed mesons. The results are turn out to be in quantitative agreement with experimental data.
Highlights
Open charmed mesons, composite states of charm quark (c) and up (u), down (d), or strange (s) antiquark, were observed two years later than the discovery of the J/ψ particle in 1974
We show in the present work that how the original SU (3) flavor symmetry of hadrons can be extended to SU (4) in the framework of a chirally symmetric model with charm as an extra quantum number
The extended Linear Sigma Model (eLSM) emulates the global symmetries of the QCD Lagrangian; the global chiral symmetry, the discrete C, P, and T symmetries, and the classical dilatation symmetry
Summary
Composite states of charm quark (c) and up (u), down (d), or strange (s) antiquark, were observed two years later than the discovery of the J/ψ particle in 1974. We present a U (4)R × U (4)L chirally symmetric model, which in addition to scalar and pseudoscalar mesons includes vector and axial-vector mesons. We calculate open charmed meson masses and the weak decay constants of nonstrange open charm D and strange open charm DS.
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