Author:
Astrakhantsev Nikita,Braguta V. V.,Kotov A. Yu.,Kuznedelev D. D.,Nikolaev A. A.
Abstract
AbstractIn this paper we study the properties of QCD at nonzero chiral density $$\rho _5$$
ρ
5
, which is introduced through chiral chemical potential $$\mu _5$$
μ
5
. The study is performed within lattice simulation of QCD with dynamical rooted staggered fermions. We first check that $$\rho _5$$
ρ
5
is generated at nonzero $$\mu _5$$
μ
5
and in the chiral limit observe $$\rho _5 \sim \varLambda _{QCD}^2 \mu _5$$
ρ
5
∼
Λ
QCD
2
μ
5
. We also test the possible connection between confinement and topological fluctuations. To this end, we measured the topological susceptibility $$\chi _{\mathrm{top}}$$
χ
top
and string tension $$\sigma $$
σ
for various values of $$\mu _5$$
μ
5
. We observed that string tension grows with $$\mu _5$$
μ
5
. It seems that topological susceptibility also rises with $$\mu _5$$
μ
5
, but to state this more reliably the uncertainties should be reduced. We believe that our results indicate possible connection between topological fluctuations and the strength of confinement.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
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