Excited QCD 2017

Session

Tuesday Morning (20min talks + 10min discussions)

9 May 2017, 08:30

Sintra, Portugal

Conveners

Tuesday Morning (20min talks + 10min discussions)

• Marina Marinkovic (CERN)

158. Monte Carlo calculations using the holomorphic gradient flow

Andrei Alexandru (The George Washington University)

09/05/2017, 08:30

Questions about quantum field theories at non-zero chemical potential and/or real-time correlators are often impossible to investigate numerically due to the notorious sign problem. A possible solution to this problem is to deform the integration domain for the path integral in the complex plane. We describe a family of such deformations, built using the holomorphic gradient flow, that...

144. A new theoretical method for lattice QCD calculations at finite density beyond the sign problem

Hideo Suganuma (Kyoto University)

09/05/2017, 09:00

We propose a new theoretical method for the practical lattice QCD calculation at finite density as a possible solution of the sign problem in finite-density QCD. In this method, the fermionic determinant becomes real and non-negative, and therefore no sign problem appears and the practical numerical calculation can be performed in lattice QCD.

145. Lattice Landau gauge gluon propagator at finite temperature: non-zero Matsubara frequencies and spectral densities

Paulo Silva (Center for Physics, University of Coimbra)

09/05/2017, 09:30

The lattice Landau gauge gluon propagator at finite temperature is computed including the non-zero Matsubara frequencies. Furthermore, the Källén-Lehmann representation is inverted and the corresponding spectral density evaluated using a Tikhonov regularisation together with Morozov discrepancy principle. Implications for gluon confinement are also discussed.

166. Center Vortices and Topological Charge

Roman Höllwieser

09/05/2017, 10:00

I review important aspects of the interplay between center vortices and topological charge.

137. Chern-Simons 5-form and Holographic Baryons

Shigeki Sugimoto (Kyoto University)

09/05/2017, 11:00

In the top-down holographic model of QCD based on D4/D8-branes in type IIA string theory and some of the bottom up models, the low energy effective theory of mesons is described by a 5 dimensional Yang-Mills-Chern-Simons theory in a certain curved background with two boundaries. The 5 dimensional Chern-Simons term plays a crucial role to reproduce the correct chiral anomaly in 4 dimensional...

170. The Quark propagator in QCD and QCD-like theories

Romain Contant (University of Graz)

09/05/2017, 11:30

QCD-like theories provide testing grounds for truncations of functional equations at non-zero density, since comparisons with lattice results are possible due to the absence of the sign problem. As a first step towards such a comparison, we determine for various theories the chiral and confinement/deconfinement transitions from the quark propagator Dyson-Schwinger equation by calculating the...