Improved chiral properties of FLIC fermions

The chiral properties of the fat-link irrelevant clover (FLIC) fermion action are examined. The improved chiral properties of fermion actions incorporating smoothed links are realised in the FLIC action where only the irrelevant operators of the fermion action are constructed with smoothed links. In...

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Bibliographic Details
Published in:Physics letters. B 2005-06, Vol.616 (3-4), p.196-202
Main Authors: Boinepalli, S., Kamleh, W., Leinweber, D.B., Williams, A.G., Zanotti, J.M.
Format: Article
Language:English
Subjects:
Chiral properties
Exact sciences and technology
Lattice fermions
Nonperturbative QCD
Nuclear physics
Physics
The physics of elementary particles and fields
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Summary:The chiral properties of the fat-link irrelevant clover (FLIC) fermion action are examined. The improved chiral properties of fermion actions incorporating smoothed links are realised in the FLIC action where only the irrelevant operators of the fermion action are constructed with smoothed links. In particular, the histogram of the additive mass renormalisation encountered in chiral-symmetry breaking Wilson-type fermion actions is seen to narrow upon introducing fat links in the irrelevant operators. The exceptional configuration problem of quenched QCD is reduced, enabling access to the light quark mass regime of mπ/mρ≃1/3. In particular, quenched chiral nonanalytic behaviour is revealed in the light quark mass dependence of the Δ-baryon mass. FLIC fermions offer a promising approach to revealing the properties of full QCD at light quark masses.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2005.04.050