Transport coefficients of heavy baryons

Abstract : We compute the transport coefficients (drag and momentum diffusion) of the low-lying heavy baryons $\Lambda_c$ and $\Lambda_b$ in a medium of light mesons formed at the later stages of high-energy heavy-ion collisions. We employ the Fokker-Planck approach to obtain the transport coefficients from unitarized baryon-meson interactions based on effective field theories that respect chiral and heavy-quark symmetries. We provide the transport coefficients as a function of temperature and heavy-baryon momentum, and analyze the applicability of certain non-relativistic estimates. Moreover we compare our outcome for the spatial diffusion coefficient to the one coming from the solution of the Boltzmann-Uehling-Uhlenbeck transport equation and we find a very good agreement between both calculations. The transport coefficients for $\Lambda_c$ and $\Lambda_b$ in a thermal bath will be used in a subsequent publication as input in a Langevin evolution code for the generation and propagation of heavy particles in heavy-ion collisions at LHC and RHIC energies.
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Contributor : Sylvie Flores <>
Submitted on : Thursday, May 19, 2016 - 8:44:07 AM
Last modification on : Friday, June 22, 2018 - 9:28:04 AM

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Laura Tolos, Juan M. Torres-Rincon, Santosh K. Das. Transport coefficients of heavy baryons. Physical Review D, American Physical Society, 2016, 94 (3), pp. 034018. ⟨10.1103/PhysRevD.94.034018⟩. ⟨in2p3-01317947⟩

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