ar X iv : h ep - l at / 9 90 91 23 v 1 1 5 Se p 19 99 1 Physical Effects of Infrared Quark Eigenmodes in LQCD ∗
نویسنده
چکیده
A truncated determinant algorithm is used to study the physical effects of the quark eigenmodes associated with eigenvalues below 400 MeV. This initial study focuses on coarse lattices (with O(a) improved gauge action), light internal quark masses and large physical volumes. Four bellwether full QCD processes are discussed: topological charge distributions, the eta prime propagator, string breaking as observed in the static energy and the rho decay into two pions.
منابع مشابه
ar X iv : h ep - l at / 9 90 91 16 v 1 1 4 Se p 19 99 The flavour and quark mass dependence of thermodynamic quantities in lattice
The dependence of thermodynamic properties of QCD on the number of quark flavours is investigated. Lattice results for the equation of state are presented for 2, 2+1 and 3 quark flavours. The simulations have been performed with the improved p4-staggered fermion and a Symanzik improved gluon action on lattices of size 16 3 × 4 and 16 4 .
متن کاملar X iv : h ep - l at / 9 80 91 44 v 1 1 8 Se p 19 98 1 Truncated Determinant Approach to Light Dynamical Quarks
Virtual quark effects in lattice QCD are studied in an approach where the infrared modes are included in a precise and gauge-invariant manner. At fixed physical volume the required number of modes does not increase in the continuum limit, and the acceptance is tolerable even for very light quark masses. Topological charge distributions at varying quark mass, and the static quark potential, show...
متن کاملar X iv : h ep - l at / 9 90 91 28 v 1 1 6 Se p 19 99 1 Chiral Effects of Quenched η ′ Loops ∗
Preliminary results of a study of quenched chiral logarithms at β = 5.7 are presented. Four independent determinations of the quenched chiral log parameter δ are obtained. Two of these are from estimates of the η′ mass, one from the residue of the hairpin diagram and the other from the topological susceptibility combined with the Witten-Veneziano formula. The other two determinations of δ are f...
متن کاملar X iv : h ep - l at / 9 90 91 65 v 1 2 9 Se p 19 99 The Heavy Hybrid Spectrum from NRQCD and the Born - Oppenheimer Approximation ∗
The spectrum of heavy-quark hybrids is studied in the leading Born-Oppenheimer (LBO) approximation and using leading-order NRQCD simulations with an improved gluon action on anisotropic lattices. The masses of four hybrid states are obtained from our simulations for lattice spacings 0.1 fm and 0.2 fm and are compared to the LBO predictions obtained using previously-determined glue-excited stati...
متن کاملar X iv : h ep - l at / 9 90 91 02 v 1 1 3 Se p 19 99 1 KANAZAWA 99
We found a quantum perfect lattice action in the 4-dimensional monopole current theory which is known as an effective theory in the infrared region of QCD. The perfect monopole action is transformed exactly into a lattice action of a string model. When the monopole interactions are weak as in the case of infrared SU(2) QCD, the string interactions are strong. The static potential and the string...
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