f[sub K]/f[sub pi] in full QCD with domain wall valence quarks
S. R. Beane, P. F. Bedaque, K. Orginos, and M. J. Savage NPLQCD Collaboration
We compute the ratio of pseudoscalar decay constants f[sub K]/f[sub pi] using domain-wall valence quarks and rooted improved Kogut-Susskind sea quarks, at a lattice spacing of b~0.125 fm. By employing continuum chiral perturbation theory, we extract the Gasser-Leutwyler low-energy constant L[sub 5] ... [Phys. Rev. D 75, 094501 (2007)] published Wed May 2, 2007.
Improving the Improved Action
E. T. Tomboulis and A. Velytsky
We investigate the construction of improved actions by the Monte Carlo renormalization group method in the context of SU(2) gauge theory utilizing different decimation procedures and effective actions. We demonstrate that the basic self-consistency requirement for correct application of the Monte Ca ... [Phys. Rev. Lett. 98, 181601 (2007)] published Tue May 1, 2007.
Hadron Deformation and Form Factors from Lattice QCD
C. Alexandrou
We review the current status of lattice QCD studies of the nucleon system. In particular, we focus on the determination of the shape of the nucleon by probing its wave function as well as by evaluating the N to Delta transition form factors. (C)2007 American Institute of Physics ... [AIP Conf. Proc. 904, 49 (2007)] published Mon Apr 30, 2007.
Theoretical Issues
Marc Vanderhaeghen
The theoretical issues in the interpretation of the precision measurements of the nucleon-to-Delta transition by means of electromagnetic probes are highlighted. The results of these measurements are confronted with the state-of-the-art calculations based on chiral effective-field theories (EFT), la ... [AIP Conf. Proc. 904, 25 (2007)] published Mon Apr 30, 2007.
Overview: The Shape of Hadrons
A. M. Bernstein and C. N. Papanicolas
In this article we address the physical basis of the deviation of hadron shapes from spherical symmetry (non-spherical amplitudes) with focus on the nucleon and Delta. An overview of both the experimental methods and results and the current theoretical understanding of the issue is presented. At the ... [AIP Conf. Proc. 904, 1 (2007)] published Mon Apr 30, 2007.
Metastable domains and potential energy surfaces in organic charge-transfer salts with neutral-ionic phase transitions
Zoltan G. Soos and Anna Painelli
A modified Hubbard model with linear coupling to both lattice phonons and molecular vibrations is applied to the structural and electronic instabilities of organic charge-transfer (CT) salts such as tetrathiafulvalene-chloranil (TTF-CA). The potential energy surface (PES) of the correlated model is ... [Phys. Rev. B 75, 155119 (2007)] published Fri Apr 27, 2007.
Underdoped cuprate phenomenology in the two-dimensional Hubbard model within the composite operator method
Adolfo Avella and Ferdinando Mancini
The two-dimensional Hubbard model is studied within the composite operator method (COM) with the self-energy computed in the self-consistent Born approximation (SCBA). The COM describes interacting electrons in terms of the new elementary excitations that appear in the system owing to strong correla ... [Phys. Rev. B 75, 134518 (2007)] published Fri Apr 27, 2007.
Ginsparg-Wilson Dirac operator in monopole backgrounds on the fuzzy 2-sphere
Hajime Aoki, Satoshi Iso, and Toshiharu Maeda
In previous papers, we studied 't Hooft-Polyakov (TP) monopole configurations in U(2) gauge theory on the fuzzy 2-sphere, and showed that they have nonzero topological charges in the formalism based on the Ginsparg-Wilson (GW) relation. In this paper, we will show an index theorem in the TP monopole ... [Phys. Rev. D 75, 085021 (2007)] published Fri Apr 27, 2007.
Lattice calculation of strong coupling constant from vacuum polarization functions. (arXiv:0807.0556v2 [hep-lat])
ePrint arXiv http://arXiv.org/
Nucleon axial charge in 2+1 flavor dynamical lattice QCD with domain wall fermions. (arXiv:0801.4016v2 [hep-lat] UPDATED)
ePrint arXiv http://arXiv.org/
Isotropic and Anisotropic Lattice Spacing Corrections for I=2 pi-pi Scattering from Effective Field Theory. (arXiv:0802.2931v2 [hep-lat] UPDATED)
ePrint arXiv http://arXiv.org/
Bottom baryons from a dynamical lattice QCD simulation. (arXiv:0806.4783v2 [hep-lat] UPDATED)
ePrint arXiv http://arXiv.org/