PoS - Proceedings of Science
Volume 363 - 37th International Symposium on Lattice Field Theory (LATTICE2019) - Main session
Trace anomaly and dynamical quark mass
Y.B. Yang,* J. Liang, Z. Liu, P. Sun on behalf of XQCD Collaboration
*corresponding author
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Pre-published on: March 29, 2020
Published on: August 27, 2020
We investigated the origin of the RI'/MOM quark mass under the Landau gauge at the non-perturbative scale, using the chiral fermion with different quark masses and lattice spacings. Our result confirms that such a mass is non-vanishing based on the linear extrapolation to the chiral and continuum limit, and shows that such a mass comes from the spontaneous chiral symmetry breaking induced by the near zero modes with the eigenvalue $\lambda<{\cal O}(5m_q)$, and is proportional to the quark matrix element of the trace anomaly at least down to $\sim $1.3 GeV.
DOI: https://doi.org/10.22323/1.363.0001
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