PaperPanorama

HEP Lattice·hep-lat

Mon·Dec 3, 2007

4 papers—2 primary·2 cross-listed·reconstructed*

All4Primary2Cross-lists2
  1. 01*

    Towards an interoperable International Lattice Datagrid

    G. Beckett🇬🇧 · P. Coddington🇦🇺 · N. Ishii🇯🇵 · B. Joo🇺🇸 · D. Melkumyan🇩🇪 · R. Ostrowski🇬🇧 · D. Pleiter🇩🇪 · M. Sato🇯🇵 · J. Simone🇺🇸 · C. Watson🇺🇸 · S. Zhang🇨🇳

    The International Lattice Datagrid (ILDG) is a federation of several regional grids. Since most of these grids have reached production level, an increasing number of lattice scientists start to benefit from this new research infrastructure. The ILDG Middleware Working Group has the task of specifying the ILDG middleware such that interoperability among the different grids is achieved. In this paper we will present the architecture of the ILDG middleware and describe what has actually been achieved in recent years. Particular focus is given to interoperability and security issues. We will conclude with a short overview on issues which we plan to address in the near future.

    hep-latPoS(2007)·3 citations
  2. 02*

    Lattice study of meson correlators in the epsilon-regime of two-flavor QCD

    JLQCD Collaboration: H. Fukaya🇩🇰 · S. Aoki🇯🇵 · S. Hashimoto🇯🇵 · T. Kaneko🇯🇵 · H. Matsufuru🇯🇵 · J. Noaki🇯🇵 · K. Ogawa🇹🇼 · T. Onogi🇯🇵 · N. Yamada🇯🇵

    We calculate mesonic two-point functions in the epsilon-regime of two-flavor QCD on the lattice with exact chiral symmetry. We use gauge configurations of size 16^3 32 at the lattice spacing a \sim 0.11 fm generated with dynamical overlap fermions. The sea quark mass is fixed at \sim 3 MeV and the valence quark mass is varied in the range 1-4 MeV, both of which are in the epsilon-regime. We find a good consistency with the expectations from the next-to-leading order calculation in the epsilon-expansion of (partially quenched) chiral perturbation theory. From a fit we obtain the pion decay constant F=87.3(5.6) MeV and the chiral condensate Sigma^{MS}=[239.8(4.0) MeV ]^3 up to next-to-next-to-leading order contributions.

    hep-latPRD(2008)·59 citations
  3. 03*

    Understanding Confinement From Deconfinement

    M. Baker🇺🇸

    We use effective magnetic SU(N) pure gauge theory with cutoff M and fixed gauge coupling g_m to calculate non-perturbative magnetic properties of the deconfined phase of SU(N) Yang-Mills theory. We obtain the response to an external closed loop of electric current by reinterpreting and regulating the calculation of the one loop effective potential in Yang-Mills theory. This effective potential gives rise to a color magnetic charge density, the counterpart in the deconfined phase of color magnetic currents introduced in effective dual superconductor theories of the confined phase via magnetically charged Higgs fields. The resulting spatial Wilson loop has area law behavior. Using values of M and g_m determined in the confined phase, we find SU(3) spatial string tensions compatible with lattice simulations in the temperature interval 1.5T_c < T < 2.5T_c. Use of the effective theory to analyze experiments on heavy ion collisions will provide applications and further tests of these ideas.

    ↳ hep-phhep-latPRD(2008)·7 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.