Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-03-31
Physics
Nuclear Physics
Nuclear Theory
Figures modified; discussions and references added
Scientific paper
The thermal relaxation rate of open-charm ($D$) mesons in hot and dense hadronic matter is calculated using empirical elastic scattering amplitudes. $D$-meson interactions with thermal pions are approximated by $D^*$ resonances, while scattering off other hadrons ($K$, $\eta$, $\rho$, $\omega$, $K^*$, $N$, $\Delta$) is evaluated using vacuum scattering amplitudes as available in the literature based on effective Lagrangians and constrained by realistic spectroscopy. The thermal relaxation time of $D$-mesons in a hot $\pi$ gas is found to be around 25-50\,fm/$c$ for temperatures $T$=150-180\,MeV, which reduces to 10-25\,fm/$c$ in a hadron-resonance gas. The latter values, argued to be conservative estimates, imply significant modifications of $D$-meson spectra in heavy-ion collisions. Close to the critical temperature ($T_c$), the spatial diffusion coefficient ($D_s$) is surprisingly similar to recent calculations for charm quarks in the Quark-Gluon Plasma using non-perturbative $T$-matrix interactions. This suggests a possibly continuous minimum structure of $D_s$ around $T_c$.
Fries Rainer J.
He Min
Rapp Ralf
No associations
LandOfFree
Thermal Relaxation of Charm in Hadronic Matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Thermal Relaxation of Charm in Hadronic Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal Relaxation of Charm in Hadronic Matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-247117