First lattice QCD extraction of octet baryon magnetic polarisabilities at mπ=156 MeV, enabled by a new exceptional-configuration removal algorithm.
Hadron Masses From Novel Fat-Link Fermion Actions
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abstract
The hadron mass spectrum is calculated in lattice QCD using a novel fat-link clover fermion action in which only the irrelevant operators in the fermion action are constructed using smeared links. The simulations are performed on a 16^3 x 32 lattice with a lattice spacing of a=0.125 fm. We compare actions with n=4 and 12 smearing sweeps with a smearing fraction of 0.7. The n=4 Fat-Link Irrelevant Clover (FLIC) action provides scaling which is superior to mean-field improvement, and offers advantages over nonperturbative 0(a) improvement, including a reduced exceptional configuration problem.
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Magnetic polarisability of octet baryons near the physical quark-mass point
First lattice QCD extraction of octet baryon magnetic polarisabilities at mπ=156 MeV, enabled by a new exceptional-configuration removal algorithm.