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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/14740

Title: Transport properties of bottomed mesons in a hot mesonic gas
Authors: Abreu, Luciano Melo
Cabrera, Daniel
Torres-Rincon, Juan M.
Keywords: Bottomed mesons;Heavy-quark effective theory
Issue Date: 2013
Publisher: American Physical Society
Citation: Phys. Rev. D 87, 034019
Abstract: In this work we evaluate the B-meson drag and diffusion coefficients in a hot medium constituted of light mesons (π, K, K⎯⎯⎯, and η). We treat the B-meson and B*-meson interactions 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 next-to-leading order 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.
URI: http://repositorio.ufba.br/ri/handle/ri/14740
ISSN: 1550-7998
Appears in Collections:Artigos Publicados em Periódicos (PPGFIS)

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