We present the lattice QCD simulation with the 2+1+1 flavor full QCD ensembles using near-physical quark masses and different spatial sizes L, at a~ 0.055 fm. The results suggest that spontaneous chiral symmetry breaking is effectively restored at L≤ 1.0 fm, while the gap between the nucleon and pion masses remains.
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Meng et al. (2024) studied this question.
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