High Energy Physics - Lattice

New submissions

• New submissions
• Cross-lists
• Replacements

New submissions for Fri, 9 May 08

[1]  arXiv:0805.1163 [ps, pdf, other]

Title: Strong coupling expansion for finite temperature Yang-Mills theory in the confined phase

Authors: Jens Langelage, Gernot Münster, Owe Philipsen (Münster U., ITP)

Comments: 18 pages, 4 figures

Subjects: High Energy Physics - Lattice (hep-lat)

We perform euclidean strong coupling expansions for Yang Mills theory on the lattice at finite temperature. After setting up the formalism for general SU(N), we compute the first few terms of the series for the free energy density and the lowest screening mass in the case of SU(2). To next-to-leading order the free energy series agrees with that of an ideal gas of glueballs. This demonstrates that in the confined phase the quasi-particles indeed correspond to the T=0 hadron excitations, as commonly assumed in hadron resonance gas models. Our result also fixes the lower integration constant for Monte Carlo calculations of the thermodynamic pressure via the integral method. In accord with Monte Carlo results, we find screening masses to be nearly temperature independent in the confined phase. This and the exponential smallness of the pressure can be understood as genuine strong coupling effects. Finally, we analyse Pade approximants to estimate the critical couplings of the phase transition, which for our short series are only ~25% accurate. However, up to these couplings the equation of state agrees quantitatively with numerical results on N_t=2-4 lattices.

[2]  arXiv:0805.1174 [ps, pdf, other]

Title: Zero mode contribution in quarkonium correlators and in-medium properties of heavy quarks

Authors: Saumen Datta, Peter Petreczky

Comments: Contribution to QM2008, 4 pages, LaTeX, uses iopart.cls

Subjects: High Energy Physics - Lattice (hep-lat)

We calculate the low energy contribution to quarkonium correlators in Euclidean time in lattice QCD. This contribution was found to give the dominant source of the temperature dependence of the correlators. We have found that the low energy contribution is well described by a quasi-particle model and have determined the effective temperature dependent heavy quark mass.

Cross-lists for Fri, 9 May 08

[3]  arXiv:0805.0784 (cross-list from hep-ph) [ps, pdf, other]

Title: Thermalization in SU(3) gauge theory after a deconfining quench

Authors: Alexei Bazavov, Bernd A. Berg, Adrian Dumitru

Comments: 7 pages, 7 figures

Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Lattice (hep-lat); Nuclear Theory (nucl-th)

We determine the time evolution of fluctuations of the Polyakov loop after a quench into the deconfined phase of SU(3) gauge theory from a simple classical relativistic Lagrangian. We compare the structure factors, which indicate spinodal decomposition followed by relaxation, to those obtained via Markov Chain Monte Carlo techniques in SU(3) lattice gauge theory. We find that the time when the structure factor peaks diverges like $\sim 1/k^2$ in the long-wavelength limit. This is due to formation of competing Z(3) domains for configurations where the Polyakov loop exhibits non-perturbatively large variations in space, which delay thermalization of long wavelength modes. For realistic temperatures, and away from the extreme weak-coupling limit, we find that even modes with $k$ on the order of $T$ experience delayed thermalization. Relaxation times of very long wavelength modes are found to be on the order of the size of the system; thus, the dynamics of competing domains should accompany the hydrodynamic description of the deconfined vacuum.

Replacements for Fri, 9 May 08

[4]  arXiv:hep-ph/0607293 (replaced) [ps, pdf, other]

Title: Dynamically induced scalar quark confinement

Authors: Reinhard Alkofer, Christian S. Fischer, Felipe J. Llanes-Estrada

Comments: 12 pages, 2 figures; v2: clarifications added and typos corrected, version to be published by MPLA

Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Lattice (hep-lat); High Energy Physics - Theory (hep-th); Nuclear Theory (nucl-th)

[5]  arXiv:0705.4295 (replaced) [ps, pdf, other]

Title: Nucleon Generalized Parton Distributions from Full Lattice QCD

Authors: Ph. Hägler, W. Schroers, J. Bratt, R.G. Edwards, M. Engelhardt, G.T. Fleming, B. Musch, J.W. Negele, K. Orginos, A.V. Pochinsky, D.B. Renner, D.G. Richards (LHPC Collaboration)

Comments: 40 pages, 49 figures; Revised chiral extrapolations in sections A-K, main conclusions unchanged

Journal-ref: Phys. Rev. D 77, 094502 (2008)

Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)

[6]  arXiv:0711.0236 (replaced) [ps, pdf, other]

Title: Euclidean Correlation Functions in a Holographic Model of QCD

Authors: Thomas Schaefer (North Carolina State University)

Comments: 16 pages, 5 figures, minor changes (references added), to appear in Phys Rev D

Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Lattice (hep-lat)

[7]  arXiv:0711.0696 (replaced) [ps, pdf, other]

Title: 't Hooft vertices, partial quenching, and rooted staggered QCD

Authors: Claude Bernard (Washington U.), Maarten Golterman (SFSU), Yigal Shamir (Tel-Aviv U.), Stephen Sharpe (U. of Washington)

Comments: 19 pages, revtex, shortened version to appear in Phys. Rev. D

Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph)

• New submissions
• Cross-lists
• Replacements