Mon·Nov 5, 2001Monday·November 5, 2001

1. 01*

   Scaling behavior of improvement and renormalization constants

   Tanmoy Bhattacharya🇺🇸 · Rajan Gupta🇺🇸 · Weonjong Lee🇺🇸 · Stephen Sharpe🇺🇸

   This talk summarizes results for all the scale independent renormalization constants for bilinear currents ($Z_A$, $Z_V$, and $Z_S/Z_P$), the improvement constants ($c_A$, $c_V$, and $c_T$), the quark mass dependence of $Z_O$, and the coefficients of the equation of motion operators for $O(a)$ improved lattice QCD. Using data at $\beta =6.0$, 6.2 and 6.4 we study the scaling behavior of these quantities and quantify residual discretization errors.

   hep-latNucl.Phys.B Proc.Suppl.(2002)·23 citations
2. 02*

   Renormalization constants using quark states in Landau gauge

   Tanmoy Bhattacharya🇺🇸 · Rajan Gupta🇺🇸 · Weonjong Lee🇺🇸

   We show that given one O(a) improvement constant, b_m, all the remaining quantities needed to define the renormalized and O(a) improved dimension-3 quark bilinears can be obtained by studying the matrix elements of these operators between external quark states in a fixed gauge.

   hep-latNucl.Phys.B Proc.Suppl.(2002)·4 citations
3. 03*

   Quark Number Susceptibility in Hard Thermal Loop Approximation

   Purnendu Chakraborty🇮🇳 · Munshi G. Mustafa (Saha Inst. of Nucl. Phys., Kolkata, India)🇮🇳 · Markus H. Thoma (Max-Planck-Institut fuer Extraterrestrische Physik, Garching, Germany)🇩🇪

   We calculate the quark number susceptibility in the deconfined phase of QCD using the hard thermal loop (HTL) approximation for the quark propagator. This improved perturbation theory takes into account important medium effects such as thermal quark masses and Landau damping in the quark-gluon plasma. We explicitly show that the Landau damping part in the quark propagator for spacelike quark momenta does not contribute to the quark number susceptibility due to the quark number conservation. We find that the quark number susceptibility only due to the collective quark modes deviates from that of free one around the critical temperature but approaches free results at infinite temperature limit. The results are in conformity with recent lattice calculations.

   ↳ hep-phhep-latnucl-thEPJC(2002)·74 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.