Fate of charmed mesons near chiral symmetry restoration in hot matter

Understand

Chiral thermodynamics of charmed mesons is formulated at finite temperature within a $2+1+1$-flavored effective Lagrangian incorporating heavy quark symmetry.

• The charmed-meson mean fields act as an extra source which breaks the chiral symmetry explicitly.
• This leads to effective interactions between the light and heavy-light mesons, which intrinsically depend on temperature.
• Effective masses of the scalar and pseudoscalar charmed-mesons tend to approach each other as increasing temperature, so that the splitting between the chiral partners is reduced.