nucl-th digest · Jul 29, 2015

Reply to "Comment on `Lattice determination of Sigma - Lambda mixing' "

In this Reply, we respond to the above Comment. Our computation [Phys. Rev. D 91 (2015) 074512] only took into account pure QCD effects, arising from quark mass differences, so it is not surprising that there are discrepancies in isospin splittings and in the Sigma - Lambda mixing angle. We expect that these discrepancies will be smaller in a full calculation incorporating QED effects.

Comments:: 5 pages
Subjects:: High Energy Physics — Lattice (hep-lat); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
arXiv:: 1507.07825 [pdf]

PRD(2015)·11 citations

[Submitted on 28 Jul 2015] (cross-list from hep-ph)

Analytic solution of the Boltzmann equation in an expanding system

D. Bazow (Ohio State U.)🇺🇸 · G. S. Denicol (Brookhaven & McGill U.)🇨🇦 · U. Heinz (Ohio State U.)🇺🇸 · M. Martinez (Ohio State U.)🇺🇸 · J. Noronha (Sao Paulo U. & Columbia U.)🇧🇷

For a massless gas with constant cross section in a homogeneous, isotropically expanding spacetime we reformulate the relativistic Boltzmann equation as a set of non-linear coupled moment equations. For a particular initial condition this set can be solved exactly, yielding the first analytical solution of the Boltzmann equation for an expanding system. The non-equilibrium behavior of this relativistic gas can be mapped onto that of a homogeneous, static non-relativistic gas of Maxwell molecules.

Comments:: 5 pages, 1 figure; minor changes, accepted for publication in Phys. Rev. Lett
Subjects:: High Energy Physics — Phenomenology (hep-ph); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics — Theory (hep-th); Nuclear Theory (nucl-th); Fluid Dynamics (physics.flu-dyn)
arXiv:: 1507.07834 [pdf]

PRL(2016)·73 citations

Wednesday·July 29, 2015

Reply to "Comment on `Lattice determination of Sigma - Lambda mixing' "

Analytic solution of the Boltzmann equation in an expanding system

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