The Thermal Delocalization of the Flux Tubes in Mesons and Baryons

Bakry, Ahmed S.; Leinweber, Derek B.; Williams, Anthony G.

doi:10.1063/1.3587603

Cited by 16 publications

(40 citation statements)

References 1 publication

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“…On the other hand, it is clear that the data points for R 0:8 fm shift up with the increase of the number of smearing sweeps. The removal of short distance physics is manifest here [31]. The difference in the regularization brought about by the increasing of the space-time cutoff introduced by smearing shifts the q " q potential by a renormalization constant in Eq.…”

Section: A Quark-antiquark Potentialmentioning

confidence: 98%

“…10, the largest deviations from the model predictions do occur at the lowest level of smearing where the short distance physics is best preserved. The increase in agreement between the model prediction and lattice data at short distances 0:6 R 1:0 fm for measurements taken on highly smoothed gauge configurations is, however, an interesting observation in its own right with physical implications that will be studied in detail elsewhere [31].…”

Section: Tube Profile (Quantitative Aspects)mentioning

confidence: 99%

“…The string picture can parametrize these profiles only at large distances. At short distances on the other hand, the free-string picture does not model the gluonic interactions on the scale of short distances which may become even more relevant in the thermal regime [31].…”

Section: Tube Profile (Quantitative Aspects)mentioning

confidence: 99%

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String effects and the distribution of the glue in static mesons at finite temperature

et al. 2010

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3. The right to use all or part of the Article, including the APS-prepared version without revision or modification, on the author(s)' web home page or employer's website and to make copies of all or part of the Article, including the APS-prepared version without revision or modification, for the author(s)' and/or the employer's use for educational or research purposes." th June 2013String effects and the distribution of the glue in static mesons at finite temperature The distribution of the gluon action density in mesonic systems is investigated at finite temperature. The simulations are performed in quenched QCD for two temperatures below the deconfinement phase. Unlike the gluonic profiles displayed at T ¼ 0, the action-density isosurfaces display a prolate-spheroid-like shape. The curved width profile of the flux tube is found to be consistent with the prediction of the free bosonic string model at large distances.

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Section: A Quark-antiquark Potentialmentioning

confidence: 98%

Section: Tube Profile (Quantitative Aspects)mentioning

confidence: 99%

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String effects and the distribution of the glue in static mesons at finite temperature

et al. 2010

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“…The coefficient c is a proportionality constant determined [37] to be c = 6.15 (3). The smearing radii for our selected values of N sw = 0, 10, 20, 40, 60 are R/a = 0, 1.9, 2.7, 3.8, and 4.7 respectively.…”

Section: A Gluonic Observablesmentioning

confidence: 99%

“…The process of stout-link smearing is expected to remove the short distance physics up to an effective radius [37] which may be parameterised as…”

Section: A Gluonic Observablesmentioning

confidence: 99%

Instanton contributions to the low-lying hadron mass spectrum

2015

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The role of instanton-like objects in the QCD vacuum on the mass spectrum of low-lying light hadrons is explored in lattice QCD. Using over-improved stout-link smearing, tuned to preserve instanton-like objects in the QCD vacuum, the evolution of the mass spectrum under smearing is examined. The calculation is performed using a 20 3 ×40 dynamical fat-link-irrelevant-clover (FLIC) fermion action ensemble with lattice spacing 0.126 fm. Through the consideration of a range of pion masses, the effect of the vacuum instanton content is compared at a common pion mass. While the qualitative features of ground-state hadrons are preserved on instantondominated configurations, the excitation spectrum experiences significant changes. The underlying physics revealed shows little similarity to the direct-instanton interaction predictions of the instanton liquid model.

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Flux tubes at finite temperature

Cea

Cosmai

Cuteri

et al. 2016

J. High Energ. Phys.

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The chromoelectric field generated by a static quark-antiquark pair, with its peculiar tube-like shape, can be nicely described, at zero temperature, within the dual superconductor scenario for the QCD confining vacuum. In this work we investigate, by lattice Monte Carlo simulations of the SU(3) pure gauge theory, the fate of chromoelectric flux tubes across the deconfinement transition. We find that, if the distance between the static sources is kept fixed at about 0.76 fm 1.6/ √ σ and the temperature is increased towards and above the deconfinement temperature T c , the amplitude of the field inside the flux tube gets smaller, while the shape of the flux tube does not vary appreciably across deconfinement. This scenario with flux-tube "evaporation" above T c has no correspondence in ordinary (type-II) superconductivity, where instead the transition to the phase with normal conductivity is characterized by a divergent fattening of flux tubes as the transition temperature is approached from below. We present also some evidence about the existence of flux-tube structures in the magnetic sector of the theory in the deconfined phase.

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The Thermal Delocalization of the Flux Tubes in Mesons and Baryons

Cited by 16 publications

References 1 publication

String effects and the distribution of the glue in static mesons at finite temperature

String effects and the distribution of the glue in static mesons at finite temperature

Instanton contributions to the low-lying hadron mass spectrum

Flux tubes at finite temperature

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