Wed·Oct 19, 2005Wednesday·October 19, 2005

1. 01*

   Pion form factors in two-flavor QCD

   JLQCD collaboration: S. Hashimoto🇯🇵 · S. Aoki🇯🇵 · M. Fukugita🇯🇵 · K.-I. Ishikawa🇯🇵 · N. Ishizuka🇯🇵 · Y. Iwasaki🇯🇵 · K. Kanaya🇯🇵 · T. Kaneko🇯🇵 · Y. Kuramashi🇯🇵 · M. Okawa🇯🇵 · N. Tsutsui🇯🇵 · A. Ukawa🇯🇵 · N. Yamada🇯🇵 · T. Yoshie🇯🇵

   We present a calculation of pion electromagnetic and scalar form factors in two-flavor QCD with the non-perturbatively O(a)-improved Wilson fermion. Chiral extrapolation of the corresponding charge radius is discussed based on the chiral perturbation theory.

   hep-latPoS(2006)·26 citations
2. 02*

   Comparison of Chiral Fermion Methods

   Robert G. Edwards🇺🇸 · Balint Joo🇬🇧 · Anthony D. Kennedy🇬🇧 · Kostas Orginos🇺🇸 · Urs Wenger🇩🇪

   We present a comparison of various five-dimensional representations of chiral fermions considering their cost and residual chiral symmetry breaking.

   hep-latPoS(2006)·22 citations
3. 03*

   The QCD phase diagram at finite density

   Christian Schmidt🇺🇸 · Zoltan Fodor🇩🇪 · Sandor Katz🇭🇺

   We study the density of states method to explore the phase diagram of the chiral transition on the tempeature and quark chemical potential plane. Four quark flavours are used in the analysis. Though the method is quite expensive small lattices show an indication for a triple-point connecting three different phases on the phase diagram.

   hep-latPoS(2006)·19 citations
4. 04*

   Staggered Chiral Perturbation Theory for Heavy-Light Mesons

   C. Aubin🇺🇸 · C. Bernard🇺🇸

   We incorporate heavy-light mesons into staggered chiral perturbation theory, working to leading order in 1/m_Q, where m_Q is the heavy quark mass. At first non-trivial order in the chiral expansion, staggered taste violations affect the chiral logarithms for heavy-light quantities only through the light meson propagators in loops. There are also new analytic contributions coming from additional terms in the Lagrangian involving heavy-light and light mesons. Using this heavy-light staggered chiral perturbation theory, we perform the one-loop calculation of the B (or D) meson leptonic decay constant in the partially quenched and full QCD cases. In our treatment, we assume the validity both of the "fourth root trick" to reduce four staggered tastes to one, and of the prescription to represent this trick in the chiral theory by insertions of factors of 1/4 for each sea quark loop.

   hep-lathep-phPRD(2006)·81 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.