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Nuclear Theory·nucl-th

Monday·March 2, 2015

4 papers—2 primary·2 cross-listed

All4Primary2Cross-lists2
  1. 03

    Chiral Thermodynamics with Charm

    Chihiro Sasaki🇩🇪

    Chiral thermodynamics of charmed mesons is formulated at finite temperature within a -flavored effective Lagrangian incorporating heavy quark symmetry. The chiral mass splittings are shown to be less sensitive to the light-quark flavors, attributed to the underlying heavy quark symmetry. Consequently, chiral symmetry restoration is more accelerated in the strange charmed-mesons than in the strange light mesons, and this is in striking contrast to the chiral SU(4) result. We also show the correlations between light and heavy flavors around the chiral crossover.

    ↳ hep-phnucl-thPoS(2015)·0 citations
  2. 04

    Linearly resummed hydrodynamics in a weakly curved spacetime

    Yanyan Bu🇮🇱 · Michael Lublinsky🇮🇱

    We extend our study of all-order linearly resummed hydrodynamics in a flat space~\cite{1406.7222,1409.3095} to fluids in weakly curved spaces. The underlying microscopic theory is a finite temperature super-Yang-Mills theory at strong coupling. The AdS/CFT correspondence relates black brane solutions of the Einstein gravity in asymptotically \emph{locally} geometry to relativistic conformal fluids in a weakly curved 4D background. To linear order in the amplitude of hydrodynamic variables and metric perturbations, the fluid's energy-momentum tensor is computed with derivatives of both the fluid velocity and background metric resummed to all orders. We extensively discuss the meaning of all order hydrodynamics by expressing it in terms of the memory function formalism, which is also suitable for practical simulations. In addition to two viscosity functions discussed at length in refs.~\cite{1406.7222,1409.3095}, we find four curvature induced structures coupled to the fluid via new transport coefficient functions. In ref.~\cite{0905.4069}, the latter were referred to as gravitational susceptibilities of the fluid. We analytically compute these coefficients in the hydrodynamic limit, and then numerically up to large values of momenta.

    ↳ hep-thhep-phnucl-thJHEP(2015)·22 citations

Affiliations

first authorsco-authorsvia INSPIRE