PoS - Proceedings of Science
Volume 282 - 38th International Conference on High Energy Physics (ICHEP2016) - Heavy Ions
The curvature of the chiral pseudo-critical line from lattice QCD
C. Bonati, M. D'Elia, M. Mariti, M. Mesiti*, F. Negro and F. Sanfilippo
Full text: pdf
Pre-published on: February 06, 2017
Published on: April 19, 2017
Abstract
The study of the temperature - baryon chemical potential $T-\mu_B$
phase diagram of strongly interacting matter is being performed both
experimentally and by theoretical means. The comparison between the
experimental chemical freeze-out line and the crossover line,
corresponding to chiral symmetry restoration, is one of the main
issues. At present it is not possible to perform lattice
simulations at real $\mu_B$ because of the sign problem. In order to
circumvent this issue, we make use of analytic continuation from an
imaginary chemical potential: this approach makes it possible to
obtain reliable predictions for small real $\mu_B$. By using a
state-of-the-art discretization, we study the phase diagram of
strongly interacting matter at the physical point for purely imaginary
baryon chemical potential and zero strange quark chemical potential
$\mu_s$. We locate the pseudocritical line by computing two observables
related to chiral symmetry, namely the chiral condensate and the
chiral susceptibility. We then perform a continuum limit extrapolation
with $N_t=$6,8,10 and 12 lattices, obtaining our final estimate for
the curvature of the pseudocritical line $\kappa = 0.0135(20)$. Our
study includes a thorough analysis of the systematics involved in the
definition of $T_c(\mu_B)$, and of the effect of a nonzero $\mu_s$.
DOI: https://doi.org/10.22323/1.282.0368
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.