ar X iv : h ep - l at / 0 30 80 10 v 2 4 S ep 2 00 3 1 UW - PT 03 - 12 Extending the Utility of Partially Quenched QCD ∗

ar X iv : h ep - l at / 0 30 80 10 v 1 1 1 A ug 2 00 3 1 UW - PT 03 - 12 Extending the Utility of Partially Quenched QCD ∗

It has been proposed that partially quenched chiral perturbation theory can be used together with partially quenched lattice QCD to determine the low-energy constants of real QCD. We point out a complication of this approach and show how it can be resolved. Partial quenching changes the chiral symmetry group and introduces a new independent four-derivative operator. We explore the effects of th...

ar X iv : h ep - l at / 0 61 00 16 v 1 2 O ct 2 00 6 Partially quenched QCD with a chemical potential

Using a chiral random matrix theory we can now derive the low energy partition functions and Dirac eigenvalue correlations of QCD with different chemical potentials for the dynamical and valence quarks. The results can also be extended to complex (and purely imaginary) chemical potential. We also discuss possible applications such as fitting to low energy constants and understanding the phase d...

ar X iv : h ep - l at / 0 40 10 04 v 1 2 J an 2 00 4 A partially quenched analysis of the η − η ′ system in N f = 2 QCD

A partially quenched analysis of the η − η ′ system in N f = 2 QCD We report on a first, comprehensive partially quenched study of the η − η ′ problem, based on SESAM configuration on a 16 3 × 32 lattice at β = 5.6 QCD with two (mass degenerate) active sea quark flavours, N f = 2. By means of the spectral approximation of the two-loop (hairpin) diagrams, we find clear plateau formation in the e...

ar X iv : h ep - l at / 9 80 90 18 v 3 2 M ar 2 00 0 1 Neutral B Meson Mixing and Heavy - Light Decay Constants from Quenched Lattice QCD ∗

We present high-statistics results for neutral B-meson mixing and heavy-light-meson leptonic decays in the quenched approximation from tadpole-improved clover actions at β = 6.0 and β = 6.2. We consider quantities such as BBd(s) , fDd(s) , fBd(s) and the full ∆B = 2 matrix elements as well as the corresponding SU(3)-breaking ratios. These quantities are important for determining the CKM matrix ...

ar X iv : h ep - p h / 03 12 27 6 v 1 1 9 D ec 2 00 3 The a 0 K + K − - vertex in light cone QCD sum rules