Fri·Nov 23, 2001Friday·November 23, 2001

1. 01*

   Zero temperature phase structure of multi-flavor QCD

   Seyong Kim🇰🇷 · Shigemi Ohta🇯🇵

   To study continuum limit of lattice QCD with many light quark flavors, we investigate the zero temperature phase structures of multi-flavor QCD. Currently a series of exploratory simulations are being performed with the number of quark flavors, $N_f$= 6, 8, and 10 on a set of lattice volumes for various quark masses. Here, we report on the current status of our simulation on a $8^4$ lattice.

   hep-latNucl.Phys.B Proc.Suppl.(2002)·0 citations
2. 02*

   Chiral Properties of Quenched and Full QCD

   R. D. Young🇦🇺 · D. B. Leinweber🇦🇺 · A. W. Thomas🇦🇺 · S. V. Wright🇦🇺

   We extend a technique for the chiral extrapolation of hadron masses calculated with dynamical fermions to those generated by quenched simulations. The method ensures the correct leading and next-to-leading non-analytic behaviour for either QCD or quenched QCD in the chiral limit, as well as the correct large quark mass behaviour. We find that the primary difference between quenched and dynamical baryon masses can be described by the meson loops which give rise to the different leading and next-to-leading non-analytic behaviour.

   hep-lathep-ph15 citations
3. 03*

   On the dynamics of color magnetic monopoles in full QCD

   V. Bornyakov🇷🇺 · H. Ichie🇩🇪 · S. Kitahara · Y. Koma🇩🇪 · Y. Mori🇯🇵 · Y. Nakamura🇯🇵 · M. Polikarpov🇷🇺 · G. Schierholz🇩🇪 · T. Streuer🇩🇪 · H. Stüben🇩🇪 · T. Suzuki🇯🇵

   We present first results on the dynamics of monopoles in full QCD with N_f=2 flavors of dynamical quarks. Among the quantities being studied are the monopole density and the monopole screening length, the static potential as well as the profile of the color electric flux tube. Furthermore, we derive the low-energy effective monopole action.

   hep-latNucl.Phys.B Proc.Suppl.(2002)·24 citations
4. 04*

   Improving the Dirac Operator in Lattice QCD

   Christof Gattringer🇩🇪 · C. B. Lang🇦🇹

   Recently various new concepts for the construction of Dirac operators in lattice Quantum Chromodynamics (QCD) have been introduced. These operators satisfy the so-called Ginsparg-Wilson condition (GWC), thus obeying the Atiyah-Singer index theorem and violating chiral symmetry only in a modest and local form. Here we present studies in 4-d for SU(3) gauge configurations with non-trivial topological content. We study the flow of eigenvalues and we compare the numerical stability and efficiency of a recently suggested chirally improved operator with that of others in this respect.

   hep-latComput.Phys.Commun.(2002)·9 citations
5. 05*

   Finite-size scaling for two-flavor QCD and comparison with O(N) models

   Tereza Mendes🇧🇷

   The chiral transition for two-flavor QCD is predicted to be in the same universality class as the 3d O(4) model. This prediction is verified in the Wilson case, but not for the staggered-fermion case. The comparison is usually done assuming infinite-volume behavior. Here we make an analysis of existing staggered-fermion data using finite-size scaling and normalizing the QCD data. We find better agreement for larger quark masses.

   hep-lat1 citation
6. 06*

   Critical phenomena of thick branes in warped spacetimes

   Antonio Campos (ICG, Portsmouth U.)🇬🇧

   We have investigated the effects of a generic bulk first-order phase transition on thick Minkowski branes in warped geometries. As occurs in Euclidean space, when the system is brought near the phase transition an interface separating two ordered phases splits into two interfaces with a disordered phase in between. A remarkable and distinctive feature is that the critical temperature of the phase transition is lowered due to pure geometrical effects. We have studied a variety of critical exponents and the evolution of the transverse-traceless sector of the metric fluctuations.

   ↳ hep-thastro-phcond-matgr-qc+2PRL(2002)·137 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.