Fri·Aug 29, 2003Friday·August 29, 2003

1. 01*

   Does the crossover from perturbative to nonperturbative physics in QCD become a phase transition at infinite N ?

   J. Kiskis (Davis)🇺🇸 · R. Narayanan (FIU)🇺🇸 · H. Neuberger (Rutgers)🇺🇸

   We present numerical evidence that, in the planar limit, four dimensional Euclidean Yang-Mills theory undergoes a phase transition on a finite symmetrical four-torus when the length of the sides $l$ decreases to a critical value $l_c$. For $l>l_c$ continuum reduction holds so that at leading order in $N$, there are no finite size effects in Wilson and Polyakov loops. This produces the exciting possibility of solving numerically for the meson sector of planar QCD at a cost substantially smaller than that of quenched SU(3).

   hep-lathep-phhep-thPLB(2003)·122 citations
2. 02*

   $J/\psi$ and ${\eta }_c$ in the Deconfined Plasma from Lattice QCD

   M. Asakawa🇯🇵 · T. Hatsuda🇯🇵

   Analyzing correlation functions of charmonia at finite temperature ($T$) on $32^3\times (32-96)$ anisotropic lattices by the maximum entropy method (MEM), we find that $J/\psi$ and ${\eta }_c$ survive as distinct resonances in the plasma even up to $T\simeq 1.6T_c$ and that they eventually dissociate between $1.6T_c$ and $1.9T_c$ ($T_c$ is the critical temperature of deconfinement). This suggests that the deconfined plasma is non-perturbative enough to hold heavy-quark bound states. The importance of having sufficient number of temporal data points in MEM analyses is also emphasized.

   hep-lathep-phnucl-exnucl-thPRL(2004)·561 citations
3. 03*

   Glueballs and the Pomeron

   Harvey B. Meyer🇬🇧 · Michael J. Teper🇬🇧

   We present our latest results on the glueball spectrum of SU(N) gauge theories in 2+1 dimensions for spins ranging from 0 to 6 inclusive, as well as preliminary results for SU(3) in 3+1 dimensions. Simple glueball models and the relation of the even-spin spectrum to the 'Pomeron' are discussed.

   hep-latNucl.Phys.B Proc.Suppl.(2004)·7 citations
4. 04*

   Staggered Chiral Perturbation Theory

   C. Aubin🇺🇸 · C. Bernard🇺🇸

   We discuss how to formulate a staggered chiral perturbation theory. This amounts to a generalization of the Lee-Sharpe Lagrangian to include more than one flavor (i.e. multiple staggered fields), which turns out to be nontrivial. One loop corrections to pion and kaon masses and decay constants are computed as examples in three cases: the quenched, partially quenched, and full (unquenched) case. The results for the one loop mass and decay constant corrections have already been presented in Ref. [1].

   hep-latNucl.Phys.B Proc.Suppl.(2004)·29 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.