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000293427 0247_ $$2doi$$a10.1103/PhysRevD.91.054505
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000293427 088__ $$2arXiv$$aarXiv:1411.6386
000293427 1001_ $$aEngel, Georg P.$$b0
000293427 245__ $$aSpectral density of the Dirac operator in two-flavor QCD
000293427 260__ $$a[S.l.]$$bSoc.$$c2015
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000293427 520__ $$aWe compute the spectral density of the (Hermitean) Dirac operator in Quantum Chromodynamics with two light degenerate quarks near the origin. We use CLS/ALPHA lattices generated with two flavours of O(a)-improved Wilson fermions corresponding to pseudoscalar meson masses down to 190 MeV, and with spacings in the range 0.05-0.08 fm. Thanks to the coverage of parameter space, we can extrapolate our data to the chiral and continuum limits with confidence. The results show that the spectral density at the origin is non-zero because the low modes of the Dirac operator do condense as expected in the Banks-Casher mechanism. Within errors, the spectral density turns out to be a constant function up to eigenvalues of approximately 80 MeV. Its value agrees with the one extracted from the Gell-Mann-Oakes-Renner relation.
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000293427 7001_ $$aGiusti, Leonardo$$b1
000293427 7001_ $$0P:(DE-H253)PIP1018355$$aLottini, Stefano$$b2$$udesy
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000293427 7870_ $$0PUBDB-2015-00868$$aEngel, Georg P. et.al.$$d2014$$iIsParent$$rarXiv:1411.6386$$tSpectral density of the Dirac operator in two-flavour QCD
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