PaperPanorama

HEP Lattice·hep-lat

Thu·Sep 27, 2007

8 papers—8 primary·0 cross-listed·reconstructed*

All8Primary8Cross-lists0
  1. 01*

    Numerical results of two-dimensional N=(2,2) super Yang-Mills theory

    Hidenori Fukaya🇯🇵 · Issaku Kanamori🇯🇵 · Hiroshi Suzuki🇯🇵 · Tomohisa Takimi🇯🇵

    We report the results of a numerical simulation of a lattice formulation of the two-dimensional N=(2,2) super Yang-Mills theory proposed by Suzuki and Taniguchi. We measure the 1-point functions and 2-point functions. The scenario is that only tuning of the scalar mass to a specific value gives a supersymmetric continuum limit. Our results are consistent with this scenario although conclusive results on the restoration of supersymmetry have not been obtained.

    hep-latPoS(2007)·11 citations
  2. 02*

    Logarithmic link smearing for full QCD

    Stephan Durr🇨🇭

    A Lie-algebra based recipe for smoothing gauge links in lattice field theory is presented, building on the matrix logarithm. With or without hypercubic nesting, this LOG/HYL smearing yields fat links which are differentiable w.r.t. the original ones. This is essential for defining UV-filtered ("fat link") fermion actions which may be simulated with a HMC-type algorithm. The effect of this smearing on the distribution of plaquettes and on the residual mass of tree-level O(a)-improved clover fermions in quenched QCD is studied.

    hep-latComput.Phys.Commun.(2009)·18 citations
  4. 04*

    Automatic generation of vertices for the Schroedinger functional

    Shinji Takeda🇩🇪 · Ulli Wolff🇩🇪

    We present a multiplication algorithm to recursively construct vertices for the Schroedinger functional in the abelian background field case. The algorithm is suited for automatic perturbative calculations with a variety of actions. As first applications, we derive ratios of the lambda parameters between the lattice scheme (improved gauge actions including six link loops) and the scheme, and one-loop results for the Schroedinger functional coupling with a lattice , which is motivated by considering staggered fermions.

    hep-latPoS(2007)·4 citations
  5. 05*

    Subleading properties of the QCD flux-tube in 3-d lattice gauge theory

    N.D. Hari Dass🇯🇵 · Pushan Majumdar🇩🇪

    We study the continuum limit of the string-like behaviour of flux tubes formed between static quarks and anti-quarks in three dimensional SU(2) lattice gauge theory. We compare our simulation data with the predictions of both effective string models as well as perturbation theory. On the string side we obtain clear evidence for convergence of data to predictions of Nambu-Goto theory. We comment on the scales at which the static potential starts departing from one loop perturbation theory and then again being well described by effective string theories. We also estimate the leading corrections to the one-loop perturbative potential as well as the Nambu-Goto effective string. In the intermediate regions we find an empirical formula which gives surprisingly good fits.

    hep-latPoS(2007)·4 citations
  6. 06*

    Exact Vacuum Energy of Orbifold Lattice Theories

    So Matsuura🇩🇰

    We investigate the orbifold lattice theories constructed from supersymmetric Yang-Mills matrix theories (mother theories) with four and eight supercharges. We show that the vacuum energy of these theories does not receive any quantum correction perturbatively.

    hep-lathep-thJHEP(2007)·15 citations
  7. 07*

    Hamiltonian Lattice QCD near the Light Cone

    H. J. Pirner🇩🇪 · D. Grunewald🇩🇪 · E.-M. Ilgenfritz🇩🇪 · E. V. Prokhvatilov🇷🇺

    We give a status report of our work on light cone Hamiltonian lattice QCD. We have derived an effective Hamiltonian which is only quadratic in the momenta and therefore can be simulated by standard methods. For this Hamiltonian we determine variationally an approximate ground state wave functional in the light cone limit.

    hep-latPoS(2007)·0 citations
  8. 08*

    Methods for Pseudoscalar Flavour-Singlet Mesons with Staggered Fermions

    Eric B. Gregory🇬🇧 · Alan C. Irving🇬🇧 · Chris M. Richards🇬🇧 · Craig McNeile🇬🇧

    We present the first 2+1 flavour lattice QCD calculations of pseudoscalar flavour-singlet propagators using improved staggered fermions. We explore the relevant techniques and discuss prospects for the larger scale studies now in progress. The disconnected correlator is shown to have a highly non-Gaussian distribution and reliable estimates of the errors require care.

    hep-latPRD(2008)·37 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.