Measuring of chiral susceptibility using gradient flow

Understand

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 chiral condensate and its susceptibility with Wilson-type quarks.