Simulations indicate that heavy-ion collisions enhance the visibility of charmed-meson femtoscopic correlations compared to pp collisions, providing a probe for exotic hadronic states.
Charm diffusion in a pion gas implementing unitarity, chiral and heavy quark symmetries
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abstract
We compute the charm drag and diffusion coefficients in a hot pion gas, such as is formed in a Heavy Ion Collision after the system cools sufficiently to transit into the hadron phase. We fully exploit Heavy Quark Effective Theory (with both D and D* mesons as elementary degrees of freedom during the collision) and Chiral Perturbation Theory, and employ standard unitarization to reach higher temperatures. We find that a certain friction and shear diffusion coefficients are almost p-independent at fixed temperature which simplifies phenomenological analysis. At the higher end of reliability of our calculation, T about 150 MeV, we report a charm relaxation length of some 40 fm, in agreement with the model estimate of He, Fries and Rapp. The momentum of a 1-GeV charm quark decreases about 50 MeV per Fermi when crossing the hadron phase.
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A review of thermal modifications to light and heavy hadron properties via imaginary-time formalism, effective field theories, unitarized approaches, and lattice QCD, with links to heavy-ion phenomenology.
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Hadron properties at finite temperature
A review of thermal modifications to light and heavy hadron properties via imaginary-time formalism, effective field theories, unitarized approaches, and lattice QCD, with links to heavy-ion phenomenology.