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Transport properties of bottomed mesons in a hot mesonic gas · Around

2012

Transport properties of bottomed mesons in a hot mesonic gas

Abreu, Luciano M., Cabrera, Daniel, Torres-Rincon, Juan M.

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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.

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