Bosonic stringlike behavior and the Ultraviolet filtering of QCD

Abstract

The gluonic action density is calculated in static mesons at finite temperature just below the deconfinement point. Our focus is to elucidate the role of vacuum ultraviolet fluctuations which are filtered using an improved smearing algorithm. In the intermediate source separation distance, where the free string picture poorly describes the flux tube width profile, we find upon reducing the vacuum action towards the classical instanton vacuum, the characteristics of the flux tube converge and compare favorably with the predictions of the free bosonic string. This result establishes a connection between the free string action and vacuum gauge fields and reveals the important role of ultraviolet physics in understanding the lattice data at this temperature scale. As a by-product of these calculations, we find the broadening of the QCD flux tube to be independent of the ultraviolet filtering at large distances. Our results exhibit a linearly divergent pattern in agreement with the string picture predictions.

8 pages, 8 Figures, 1 Table

References in corpus (8)

• The Width of the Confining String in Yang-Mills Theory
• Over-Improved Stout-Link Smearing
• String effects and the distribution of the glue in mesons at finite temperature
• Continuum limit of string formation in 3-d SU(2) LGT
• The Width of the Color Flux Tube at 2-Loop Order
• Flux tube delocalization at the deconfinement point
• Localization properties of fermions and bosons
• Buried treasure in the sand of the QCD vacuum

Cited by in corpus (13)

• Closed flux tubes and their string description in D=2+1 SU(N) gauge theories
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• The Y-stringlike behavior of a static hadron at finite T
• Gluonic profile of the static baryon at finite temperature
• On the ground state of Yang-Mills theory
• Partial restoration of chiral symmetry in the color flux tube
• Quantum delocalization of strings with boundary action in Yang-Mills theory
• Perturbative width of open rigid strings
• Stiff self-interacting string near QCD deconfinement point
• Boundary action and profile of effective bosonic strings
• On QCD strings beyond non-interacting model
• Intermediate-Distance String Effects in Wilson Loops\\ via Boundary Action
• Strings of diquark-quark (QQ)Q baryon before phase transition