Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Spatial string tension of finite temperature QCD matter in gauge/gravity duality  [PDF]
J. Alanen,K. Kajantie,V. Suur-Uski
Physics , 2009, DOI: 10.1103/PhysRevD.80.075017
Abstract: The computation of the spatial string tension of finite temperature QCD is discussed in QCD and in a gravity+scalar model of gauge/gravity duality.
The Spatial String Tension, Thermal Phase Transition, and AdS/QCD  [PDF]
Oleg Andreev,Valentine I. Zakharov
Physics , 2006, DOI: 10.1016/j.physletb.2007.01.002
Abstract: We present results of modeling the temperature dependence of the spatial string tension and thermal phase transition in a five-dimensional framework nowadays known as AdS/QCD. For temperatures close to the critical one we find a behaviour remarkably consistent with the lattice results.
The spatial string tension in the deconfined phase of three dimensional QCD in the large N limit  [PDF]
J. Kiskis,R. Narayanan
Physics , 2009, DOI: 10.1016/j.physletb.2009.08.015
Abstract: We numerically compute the spatial string tension in the deconfined phase of three dimensional QCD in the large N limit. Our results clearly show that the string tension grows linearly with temperature.
Monopoles and Spatial String Tension in the High Temperature Phase of SU(2) QCD  [PDF]
Shinji Ejiri
Physics , 1995, DOI: 10.1016/0370-2693(96)00245-6
Abstract: We studied a behavior of monopole currents in the high temperature (deconfinement) phase of abelian projected finite temperature SU(2) QCD in maximally abelian gauge. Wrapped monopole currents closed by periodic boundary play an important role for the spatial string tension which is a non-perturbative quantity in the deconfinement phase. The wrapped monopole current density seems to be non-vanishing in the continuum limit. These results may be related to Polyakov's analysis of the confinement mechanism using monopole gas in 3-dimensional SU(2) gauge theory with Higgs fields.
Spatial string tension in $N_f=2$ lattice QCD at finite temperature  [PDF]
V. G. Bornyakov,E. V. Lushchevskaya
Physics , 2007, DOI: 10.1134/S1063778809020082
Abstract: The spatial string tension across a crossover from the low temperature phase to the high temperature phase is computed in QCD with two flavors of non-perturbatively improved Wilson fermions at small lattice spacing a \sim 0.12fm. We find that in the low temperature phase spatial string tension agrees well with zero temperature string tension. Furthermore, it does not show increasing for temperatures up to T = 1.36 T_{pc}, the highest temperature considered. Our results agree with some theoretical predictions.
Heavy-Quark Free Energy, Debye Mass, and Spatial String Tension at Finite Temperature in Two Flavor Lattice QCD with Wilson Quark Action  [PDF]
WHOT-QCD Collaboration,:,Y. Maezawa,N. Ukita,S. Aoki,S. Ejiri,T. Hatsuda,N. Ishii,K. Kanaya
Physics , 2007, DOI: 10.1103/PhysRevD.75.074501
Abstract: We study Polyakov loop correlations and spatial Wilson loop at finite Temperature in two-flavor QCD simulations with the RG-improved gluon action and the clover-improved Wilson quark action on a $ 16^3 \times 4$ lattice. From the line of constant physics at $m_{\rm PS}/m_{\rm V}=0.65$ and 0.80, we extract the heavy-quark free energies, the effective running coupling $g_{\rm eff}(T)$ and the Debye screening mass $m_D(T)$ for various color channels of heavy quark--quark and quark--anti-quark pairs above the critical temperature. The free energies are well approximated by the screened Coulomb form with the appropriate Casimir factors at high temperature. The magnitude and the temperature dependence of the Debye mass are compared to those of the next-to-leading order thermal perturbation theory and to a phenomenological formula in terms of $g_{\rm eff}(T)$. We make a comparison between our results with the Wilson quark action and the previous results with the staggered quark action. The spatial string tension is also studied in the high temperature phase and is compared to the next-to-next-leading order prediction in an effective theory with dimensional reduction.
Spatial string tension revisited  [PDF]
M. Laine,Y. Schroder
Physics , 2005,
Abstract: The spatial string tension, a classic non-perturbative probe for the convergence of the weak-coupling expansion at high temperatures, can be determined in full QCD as well as in a dimensionally reduced effective theory. Comparing both approaches, we find surprisingly good agreement almost down to the critical temperature of the deconfinement phase transition.
String tension and monopoles in $T \neq 0$ SU(2) QCD  [PDF]
Shinji Ejiri,Shun-ichi Kitahara,Yoshimi Matsubara,Tsuneo Suzuki
Physics , 1994, DOI: 10.1016/0920-5632(95)00286-I
Abstract: Monopole and photon contributions to abelian Wilson loops are calculated using Monte-Carlo simulations of finite-temperature $SU(2)$ QCD in the maximally abelian gauge. The string tension is reproduced by monopole contribution alone also in finite temperature SU(2) QCD. The spatial string tension scales as $\sqrt{\sigma} \propto g^{2}(T)T$ and is reproduced almost by monopole contribution alone. Each configuration has one long monopole loop, and the long monopole loops alone are responsible for the string tension in the confinement phase. On the other hand, the spatial string tension in the deconfinement phase is reproduced by wrapped monopole loops alone.
Perturbative QCD with string tension  [PDF]
Ramesh Anishetty
Physics , 1998,
Abstract: String tension is introduced in perturbative QCD without hindering ultra violet renormalizability . The running gauge coupling constant remains unaltered and the string tension in the high energy limit vanishes asymptotically. Using 1/N techinique the theory can be explicitly analytically computable with cofinement built in . Spontaneous chiral symmetry breakdown along with its Goldstone is exhibited.
The string tension in massive $QCD_2$  [PDF]
A. Armoni,Y. Frishman,J. Sonnenschein
Physics , 1997, DOI: 10.1103/PhysRevLett.80.430
Abstract: We compute the string tension in massive $QCD_2$. It is shown that the string tension vanishes when the mass of the dynamical quark is zero, with no dependence on the representations of the dynamical or of the external charges. When a small mass ($m\ll e$) is added, a tension appears and we calculate its value as a function of the representations.
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.