In-medium properties of the light and heavy-light mesons in a light-front quark model

Abstract

We investigate the in-medium properties of pseudoscalar and vector mesons with the light-light and heavy-light quarks in a light-front quark model, using the in-medium quark properties computed by the quark-meson coupling model. Both models are constructed on an equal footing with the constituent quark degree of freedom. Here, we particularly focus on the weak decay constants and distribution amplitudes (DAs) of the mesons in symmetric nuclear matter. We find that the weak decay constants decrease as nuclear density increases for $\pi$, $K$, $D$, and $B$ pseudoscalar as well as $\rho$, $K^{\ast }$, $D^{\ast }$, and $B^{\ast }$ vector mesons, where their properties in free space have good agreement with the available experimental and lattice QCD data. A larger reduction is found for the light-light quark pseudoscalar mesons, while a smaller reduction is found for the heavy-light quark vector mesons, in particular, with the bottom quark. We discuss the effect of the vector potential on the weak decay constants and present our predictions for the in-medium modifications of DAs. Also, a comparison with the free space lattice QCD data is made.

17 pages, 11 figures

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• Two-particle twist-3 distribution amplitudes of the pion and kaon in the light-front quark model
• Exclusive J/psi and Upsilon photoproduction and the low x gluon
• In-Medium Pion Valence Distributions in a Light-Front Model
• Gluon and valence quark distributions for the pion and kaon in nuclear matter
• Pion weak decay constant at finite density from the instanton vacuum
• Light-Front Holography Model of the EMC Effect

Cited by in corpus (8)

• Leading twist T-even TMDs for the spin-1 heavy vector mesons
• Nuclear medium meson structures from the Schwinger proper-time Nambu--Jona-Lasinio model
• Pions valence quark distributions in asymmetric nuclear matter at finite temperature
• Quark spin-orbit correlations in spin-0 and spin-1 mesons using the light-front quark model
• Kaon Structure in the Nuclear Medium within the Light Front Approach
• Spectroscopy of excited quarkonium states in the light-front quark model
• In-medium electromagnetic form factors of pseudoscalar mesons from the quark model
• Medium effects on the electromagnetic form factors of the $\rho$ meson