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arXiv · 1211.1331

Transport properties of bottomed mesons in a hot mesonic gas

Luciano M. Abreu·Daniel Cabrera·Juan M. Torres-Rincon
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Abstract

In this work we evaluate the B-meson drag and diffusion coefficients in a hot medium constituted of light mesons (pions, kaons and eta mesons). We treat the B-meson and B*-meson interaction with pseudo-Goldstone bosons in chiral perturbation theory at next-to-leading order within the constraints from heavy quark symmetry, and employ standard unitarization techniques of NLO amplitudes in order to account for dynamically generated resonances (leading to a more efficient heavy-flavor diffusion) and thus reach higher temperatures. We estimate individual meson contributions from the gas to the transport coefficients and perform a comparison with other findings in literature. We report a bottom relaxation length of about 80 fm at a temperature of 150 MeV and for typical momenta of 1 GeV, at which our approach is reliable. Compared to a charm relaxation length of 40 fm in the same conditions, we conclude that the B mesons provide a cleaner probe of the early stages of a heavy-ion collision.

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Luciano M. Abreu, Daniel Cabrera, Juan M. Torres-Rincon. 2013-02-13. Transport properties of bottomed mesons in a hot mesonic gas. https://doi.org/10.1103/physrevd.87.034019

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