Measuring of chiral susceptibility using gradient flow [article]

Atsushi Baba, Shinji Ejiri, Kazuyuki Kanaya, Masakiyo Kitazawa, Takanori Shimojo, Asobu Suzuki, Hiroshi Suzuki, Yusuke Taniguchi, Takashi Umeda
2019 arXiv   pre-print
In lattice QCD with Wilson-type quarks, the chiral symmetry is explicitly broken by the Wilson term on finite lattices. Though the symmetry is guaranteed to recover in the continuum limit, a series of non-trivial procedures are required to recover the correct renormalized theory in the continuum limit. Recently, a new use of the gradient flow technique was proposed, in which correctly renormalized quantities are evaluated in the vanishing flow-time limit. This enables us to directly study the
more » ... iral condensate and its susceptibility with Wilson-type quarks. Extending our previous study of the chiral condensate and its disconnected susceptibility in (2+1)-flavor QCD at a heavy u, d quark mass (m_π/m_ρ≃0.63) and approximately physical s quark mass, we compute the connected contributions to the chiral susceptibility in the temperature range of 178--348 MeV on a fine lattice with a≃0.07 fm.
arXiv:1901.02294v1 fatcat:k4dwnzdg7jc5pk3v4kdyoki424