Transport properties of bottomed mesons in a hot mesonic gas

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.

14 pages, 16 figures, 3 tables. Version published in Phys.Rev.D87, 034019 (2013). Only minor improvements with respect to v1: corrected typos, further clarifications and updated references

References in corpus (7)

• Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach
• Nonperturbative Heavy-Quark Diffusion in the Quark-Gluon Plasma
• Dynamically generated 1^+ heavy mesons
• Radiative and isospin-violating decays of Ds mesons in the hadrogenesis conjecture
• Precise B, B_s and B_c meson spectroscopy from full lattice QCD
• Light Pseudoscalar Meson and Heavy Meson Scattering Lengths
• Elastic s-wave B pi, D pi, D K and K pi scattering from lattice calculations of scalar form factors in semileptonic decays

Cited by in corpus (8)

• Heavy-Quark Diffusion in the Quark-Gluon Plasma
• Open bottom states and the anti-B meson propagation in hadronic matter
• Diffusion of ${\Lambda }_c$ in hot hadronic medium and its impact on ${\Lambda }_c/D$ ratio
• Charm and Bottom Hadrons in Hot Hadronic Matter
• In-medium kinetic theory of $D$ mesons and heavy-flavor transport coefficients
• Quarkonium interactions with (hot) hadronic matter
• Hadronic effects on charmonium elliptic flows in heavy-ion collisions
• Impact of isospin asymmetric nuclear medium on pseudoscalar and vector $B$ mesons