# The 35th International Symposium on Lattice Field Theory

18-24 June 2017
Palacio de Congresos
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# Vacuum Structure and Confinement

## Place

Location: Palacio de Congresos
Address: PALACIO DE CONGRESOS Paseo del Violón s/n, 18006 Granada, SPAIN
Date: from 19 Jun 14:30 to 20 Jun 16:40

## Conveners

• 19 Jun 14:30 - 16:10
• Prof. Greensite, Jeff (San Francisco State University)
• 19 Jun 16:40 - 18:00
• Prof. Shuryak, Edward (Stony Brook University)
• 20 Jun 15:00 - 16:40
• Bicudo, Pedro (IST Lisboa)

## Timetable | Contribution List

Displaying 12 contributions out of 12
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
Recently, it is suggested that a quark number holonomy defined from the quark number densities at finite imaginary chemical potential is strongly related to the confinement-deconfinement transition [1]. We investigate the quark number density at zero and finite imaginary chemical potential in terms of the eigenmodes of the Dirac operator, which are strongly related to chiral symmetry breaking. ... More
Presented by Dr. Takahiro DOI on 20/6/2017 at 16:00
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
We examine how the vacuum expectation value (average) of double-winding Wilson loops depends on the number of color $N$ in the $SU(N)$ Yang-Mills theory. In the case where the two loops $C_1$ and $C_2$ are identical, we derive the exact operator relation which relates the double-winding Wilson loop operator in the fundamental representation to that in the higher dimensional representations dependi ... More
Presented by Mr. Ryutaro MATSUDO on 20/6/2017 at 13:20
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
We study the confining flux tube and its scaling towards the continuum limit in Nf=2+1 QCD at the physical point, discretized with stout smearing improved staggered quarks and the tree level Symanzik gauge action. In particular, we discuss the flux tube dependence on a uniform external magnetic field, showing how it displays anisotropies with respect to the magnetic field direction.
Presented by Dr. Francesco NEGRO on 19/6/2017 at 15:20
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
I will present some recent results obtained in the study of the color magnetic and electric screening masses in the QCD plasma. In particular, I will focus on how the masses get modified by strong external fields which are expected to be created in physical situations such as heavy-ion collisions.
Presented by Mr. Andrea RUCCI on 20/6/2017 at 15:00
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
We report on an instanton-based analysis of gluon Green functions in the Landau gauge for low momenta; in particular we used lattice results for $\alpha_s$ in the symmetric momentum subtraction scheme (${\rm MOM}$) for large-volume lattice simulations. We have exploited quenched gauge field configurations, $N_f=0$, with both Wilson and tree-level Symanzik improved actions, and unquenched ones wit ... More
Presented by Dr. Feliciano DE SOTO on 19/6/2017 at 13:30
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
In order to better understand the role played by instantons behind nonperturbative dynamics, we investigate the instanton contributions to the gluonic two point correlation functions in the SU(2) YM theory. Pseudoscalar-pseudoscalar and pseudoscalar-scalar gluonic correlation functions are calculated on the lattice at various temperatures and compared with the instanton calculus. We discuss how t ... More
Presented by Mr. Shingo MORI on 19/6/2017 at 14:50
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
Paradigm shift in gauge topology at finite temperatures, from the instantons to their constituents -- instanton-dyons -- has recently lead to studies of their ensembles and very significant advances. Like instantons, they have fermionic zero modes, and their collectivization at sufficiently high density explains the chiral symmetry breaking. Unlike instantons, these objects have electric ... More
Presented by Prof. Edward SHURYAK on 19/6/2017 at 14:30
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
In this talk, we study the double-winding Wilson loops in the SU(N) Yang-Mills theory on the lattice. We discuss how the area law falloff of the double-winding Wilson loop average is modified by changing the enclosing contours $C_1$ and $C_2$ for various values of the number of color $N$. By using the strong coupling expansion, we evaluate the double-winding Wilson loop average in the lattice ... More
Presented by Akihiro SHIBATA on 20/6/2017 at 13:40
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
In Coulomb gauge there is a longitudinal color electric field associated with a static quark-antiquark pair. We have measured the spatial distribution of this field, and find that it falls off exponentially with transverse distance from a line joining the two quarks. In other words there is a Coulomb flux tube, with a width that is somewhat smaller than that of the minimal energy flux tube assoc ... More
Presented by Prof. Jeff GREENSITE on 19/6/2017 at 17:00
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
We study the behavior across deconfinement phase transition of the chromoelectric flux tube generated by quark-antiquark sources and in correspondence of several distances between the sources. We present preliminary results for distances up to 1.33 fm and temperatures up to $1.5 T_c$.
Presented by Dr. Leonardo COSMAI on 19/6/2017 at 16:40
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
We investigate the predictions of Nambu-Goto (NG) and Polyakov-Kleinert (PK) effective string actions for the Casimir energy and the width of the quantum delocalization of the string at two loop order in 4-dim pure SU(3) Yang-Mills lattice gauge theory. Intermediate and large color source separation distance, before the string breaks in full QCD, at two temperature scales are considered near the d ... More
Presented by Dr. Ahmed BAKRY on 19/6/2017 at 15:40
Type: Parallel Session: Vacuum Structure and Confinement
Track: Vacuum Structure and Confinement
We will report on a detailed study of the three-gluon vertex in four-dimensional SU(3) Yang-Mills theory employing lattice simulations with large physical volumes and high statistics, and on a preliminary ongoing study of the same vertex function in QCD simulated with 2+1 Domain Wall fermions. We will mainly focus on the very low-momenta behaviour of the 1PI vertex function, and prove that it ... More
Presented by Prof. José RODRIGUEZ-QUINTERO on 19/6/2017 at 13:10
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