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Related papers: Light Quark Simulations With FLIC Fermions

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Hadron masses are calculated in quenched lattice QCD on a variety of lattices in order to probe the scaling behavior of the Fat-Link Irrelevant Clover (FLIC) fermion action, a fat-link clover fermion action in which the purely irrelevant…

High Energy Physics - Lattice · Physics 2010-03-04 J. M. Zanotti , B. Lasscock , D. B. Leinweber , A. G. Williams

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…

The hadron mass spectrum is calculated in lattice QCD using a novel fat-link clover fermion action in which only the irrelevant operators of the fermion action are constructed using smeared links. The simulations are performed on a 16^3 X…

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 realized in the FLIC action where only the irrelevant operators…

High Energy Physics - Lattice · Physics 2010-03-04 Sharada Boinepalli , Waseem Kamleh , Derek B. Leinweber , Anthony G. Williams , James M. Zanotti

The Fat-Link Irrelevant Clover (FLIC) fermion action provides a new form of nonperturbative O(a)-improvement in lattice fermion actions offering near continuum results at finite lattice spacing. It provides computationally inexpensive…

High Energy Physics - Lattice · Physics 2010-03-04 J. M. Zanotti , D. B. Leinweber , W. Melnitchouk , A. G. Williams , J. B. Zhang

The Fat-Link Irrelevant Clover (FLIC) fermion action provides a new form of nonperturbative O(a) improvement and allows efficient access to the light quark-mass regime. FLIC fermions enable the construction of the nonperturbatively…

High Energy Physics - Lattice · Physics 2010-03-04 J. M. Zanotti , S. Boinepalli , D. B. Leinweber , A. G. Williams , J. B. Zhang

The Fat-Link Irrelevant Clover (FLIC) fermion action provides a new form of nonperturbative O(a) improvement and allows efficient access to the light quark-mass regime. FLIC fermions enable the construction of the nonperturbatively…

High Energy Physics - Lattice · Physics 2010-03-04 J. M. Zanotti , D. B. Leinweber , A. G. Williams , J. B. Zhang

A pedagogical overview of the formulation of the Fat Link Irrelevant Clover (FLIC) fermion action and its associated phenomenology is described. The scaling analysis indicates FLIC fermions provide a new form of nonperturbative O(a)…

The Fat Link Irrelevant Clover (FLIC) fermion action is a variant of the $O(a)$-improved Wilson action where the irrelevant operators are constructed using smeared links. While the use of such smearing allows for the use of highly improved…

High Energy Physics - Lattice · Physics 2008-11-26 Waseem Kamleh , Ben Lasscock , Derek B. Leinweber , Anthony G. Williams

We investigate the mass of the $1^{-+}$ exotic meson, created with hybrid interpolating fields. Access to light quark masses approaching 25 MeV is facilitated by the use of the Fat-Link Irrelevant Clover (FLIC) fermion action, and large…

High Energy Physics - Lattice · Physics 2010-03-04 J. N. Hedditch , W. Kamleh , B. G. Lasscock , D. B. Leinweber , A. G. Williams , J. M. Zanotti

We present a study of the pseudoscalar and vector meson form factors, calculated using the Fat-Link Irrelevant Clover (FLIC) action in the framework of Quenched Lattice QCD. Of particular interest is the determination of a negative…

High Energy Physics - Lattice · Physics 2008-11-26 J. N. Hedditch , W. Kamleh , B. G. Lasscock , D. B. Leinweber , A. G. Williams , J. M. Zanotti

We present first results for the masses of positive and negative parity excited baryons calculated in lattice QCD using an O(a^2)-improved gluon action and a fat-link irrelevant clover (FLIC) fermion action in which only the irrelevant…

High Energy Physics - Lattice · Physics 2010-03-04 W. Melnitchouk , S. Bilson-Thompson , F. D. R. Bonnet , F. X. Lee , D. B. Leinweber , A. G. Williams , J. M. Zanotti , J. B. Zhang

Masses of positive and negative parity excited nucleons and hyperons are calculated in quenched lattice QCD using an O(a^2) improved gluon action and a fat-link clover fermion action in which only the irrelevant operators are constructed…

High Energy Physics - Lattice · Physics 2010-03-04 W. Melnitchouk , J. N. Hedditch , D. B. Leinweber , A. G. Williams , J. M. Zanotti , J. B. Zhang

We present first results for masses of positive and negative parity excited baryons in lattice QCD using an O(a^2) improved gluon action and a Fat Link Irrelevant Clover (FLIC) fermion action in which only the irrelevant operators are…

We test a recently proposed improved lattice-fermion action, the fat link clover action, examining indicators of pathological small-quark-mass lattice artifacts ("exceptional configurations") on quenched lattices of spacing 0.12 fm and…

High Energy Physics - Lattice · Physics 2008-11-26 Mark Stephenson , Carleton DeTar , Thomas DeGrand , Anna Hasenfratz

APE smearing the links in the irrelevant operators of clover fermions (Fat-Link Irrelevant Clover (FLIC) fermions) provides significant improvement in the condition number of the Hermitian-Dirac operator and gives rise to a factor of two…

High Energy Physics - Lattice · Physics 2010-03-04 W. Kamleh , D. J. Kusterer , D. B. Leinweber , A. G. Williams

We present a calculation of the lowest-lying baryon masses in the quenched approximation to QCD. The calculations are performed using a non-perturbatively improved clover fermion action, and a splitting is found between the masses of the…

The electromagnetic properties of the baryon octet are calculated in quenched QCD on a 20^3 x 40 lattice with a lattice spacing of 0.128 fm using the fat-link irrelevant clover (FLIC) fermion action. FLIC fermions enable simulations to be…

High Energy Physics - Lattice · Physics 2010-03-04 S. Boinepalli , D. B. Leinweber , A. G. Williams , J. M. Zanotti , J. B. Zhang

FLIC overlap fermions are a variant of the standard (Wilson) overlap action, with the FLIC (Fat Link Irrelevant Clover) action as the overlap kernel rather than the Wilson action. The structure of the FLIC overlap fermion propagator in…

High Energy Physics - Lattice · Physics 2010-03-04 Waseem Kamleh , Patrick O. Bowman , Derek B. Leinweber , Anthony G. Williams , Jianbo Zhang

Simulations that use the clover action in quenched QCD calculations have a lower limit to the quark mass that can be reached, because of the fluctuations caused by exceptional configurations. From this low statistics study, we find that the…

High Energy Physics - Lattice · Physics 2008-11-26 UKQCD collaboration , Craig McNeile , Chris Michael
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