Speaker
Description
We explore the changes in the masses of $D$ ($\bar D$) and $B$ ($\bar B$) mesons within isospin asymmetric $\Delta$ resonance matter, utilizing the chiral SU(3) hadronic model extended to the SU(4) and SU(5) sectors, respectively.
In addition to nucleons, the dispersion relations explicitly incorporate the interactions of $D$ and $B$ mesons with decuplet baryons ($\Delta^{++,+,0,-}$).
The properties of $D$ ($\bar{D}$) and $B$ ($\bar{B}$) mesons undergo significant in-medium modifications at finite density and temperature of asymmetric resonance matter due to their interactions with the scalar fields $\sigma$, $\zeta$, $\delta$ and the vector fields $\omega$ and $\rho$.
The effective masses of these mesons are markedly altered by the presence of $\Delta$-resonance baryons in the medium, highlighting the strong sensitivity of $u$ and $d$ light quarks in mesons to the surrounding hot and dense hadronic environment.
These in-medium modifications can substantially change the decay patterns of excited charmonium and bottomonium states, providing an additional mechanism for $J/\psi$ and $\Upsilon$ suppression and influencing several key experimental observables in heavy-ion collisions, including dilepton spectra and quarkonium production rates. Consequently, understanding these effects is essential for accurately interpreting quark--gluon plasma signatures and may enhance the analysis of upcoming heavy-ion collision data from FAIR experiments such as CBM and PANDA.
