Wed·Nov 2, 2005Wednesday·November 2, 2005

1. 01*

   The onset and deconfinement transitions in two-colour QCD

   Jon-Ivar Skullerud🇮🇪 · Simon Hands🇬🇧 · Seyong Kim🇰🇷

   We study two-colour QCD with two flavours of Wilson fermion at non-zero chemical potential mu and zero temperature. We find evidence of two separate transitions: an onset transition at mu ~ m_pi/2 where quark number and energy densities increase from zero; and a deconfinement transition at higher mu. The mu-dependence of the number and energy densities and the diquark condensate indicate that a Fermi surface is formed and that BCS rather than Bose-Einstein condensation dominates at the quark mass considered here, especially beyond the deconfinement transition.

   hep-lat4 citations
2. 02*

   Twisted mass lattice QCD: Recent developments and results

   Andrea Shindler🇩🇪

   I review recent theoretical developments and numerical results of twisted mass QCD. I argue that, combined with an efficient algorithm, twisted mass QCD can be an attractive QCD lattice action, to perform large scale simulations at small pion masses, where a matching with chiral perturbation theory can be performed. Open issues like flavour breaking effects are also addressed.

   hep-latPoS(2006)·28 citations
3. 03*

   Localization and lattice fermions

   Benjamin Svetitsky (Tel Aviv University)🇮🇱

   I review how the phenomenology of localization applies to fermions in lattice gauge theory, present measurements of the localization length and other quantities, and discuss the consequences for things like the overlap kernel.

   hep-latNucl.Phys.B Proc.Suppl.(2006)·1 citation
4. 04*

   Chiral and Continuum Extrapolation of Partially-Quenched Hadron Masses

   C. R. Allton🇬🇧 · W. Armour🇬🇧 · D. B. Leinweber🇦🇺 · A. W. Thomas🇺🇸 · R. D. Young🇺🇸

   Using the finite-range regularisation (FRR) of chiral effective field theory, the chiral extrapolation formula for the vector meson mass is derived for the case of partially-quenched QCD. We re-analyse the dynamical fermion QCD data for the vector meson mass from the CP-PACS collaboration. A global fit, including finite lattice spacing effects, of all 16 of their ensembles is performed. We study the FRR method together with a naive polynomial approach and find excellent agreement ~1% with the experimental value of M_rho from the former approach. These results are extended to the case of the nucleon mass.

   hep-latPoS(2006)·5 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.