Conveners
Chiral Symmetry
- Andreas Athenodorou (University of Cyprus)
Chiral Symmetry
- Stephan Durr (University of Wuppertal)
Dr
Stephan Durr
(University of Wuppertal)
7/25/16, 2:15 PM
Chiral Symmetry
Talk
First experiences are reported with overlap fermions which employ the Brillouin action as a kernel. After discussing the dispersion relations of both the kernel and the resulting chiral action, some of the physics features are addressed on quenched backgrounds. We find that the overlap with Brillouin kernel is much better localized than the overlap with Wilson kernel. Also a preliminary...
Dr
Johannes Heinrich Weber
(Technische Universität München)
7/25/16, 2:35 PM
Chiral Symmetry
Talk
I discuss QCD with Flavored Minimally Doubled Fermions as sea quarks.
Minimally Doubled Fermions are an ultra-local formulation that realizes a non-singlet chiral symmetry with only two real fermions at finite lattice cutoff, but break the hypercubic symmetry as well as some discrete space-time symmetries.
I show that the broken discrete space-time symmetries do not affect vacuum since the...
Zhaofeng LIU
(Institute of High Energy Physics, Chinese Academy of Sciences, Beijing)
7/25/16, 2:55 PM
Chiral Symmetry
Talk
Using 2+1-flavor domain wall fermion configurations, we calculate the overlap quark propagator in the Landau gauge. Then we try to extract the chiral condensate from the operator product expansion of the quark propagator in momentum space.
Dr
Shoji Hashimoto
(KEK)
7/25/16, 3:15 PM
Chiral Symmetry
Talk
We calculate the spectral function of the Mobius domain-wall Dirac operator utilizing a stochastic eigenvalue counting technique. From the low-end of the spectrum we extract the chiral condensate in 2+1-flavor QCD, and take the chiral and continuum limits. Lattice ensembles are those generated with Mobius domain-wall fermions at a~0.080, 0.055 and 0.044 fm.
Dr
Christian Hoelbling
(Wuppertal University)
7/25/16, 3:35 PM
Chiral Symmetry
Talk
We construct domain wall fermion operators with a staggered kernel and investigate their spectral and chiral properties numerically in the Schwinger model. In some relevant cases we see an improvement of chirality by more than an order of magnitude compared to standard domain wall fermions.
Dr
Andreas Athenodorou
(University of Cyprus)
7/27/16, 11:30 AM
Chiral Symmetry
Talk
We perform a numerical comparison of different lattice definitions of the topological charge by investigating the correlation coefficient between different definitions as well as the topological susceptibility. We use small-volume ensembles with 2 flavours of dynamical twisted mass fermions. We investigate the following definitions of the topological charge: index of the overlap Dirac...
Eduardo Royo
(Universidad de Zaragoza)
7/27/16, 11:50 AM
Chiral Symmetry
Talk
Understanding the role of the $\theta$ parameter in QCD and its
connection with the strong CP problem and axion physics is one of the
major challenges for high energy theorists. Due to the sign problem,
at present only the QCD topological susceptibility is well
known. Using an algorithmic approach that could potentially be
extended to QCD, we study as a first step the $\theta$-dependence...
Mr
Senia Valgushev
(Regensburg University)
7/27/16, 12:10 PM
Chiral Symmetry
Talk
One of the macroscopic manifestations of the Chiral anomaly in a matter with Dirac fermions is a large negative magnetoresistivity in strong magnetic fields, which is common feature of Weyl- and Dirac semimetals and QCD. However, most of previous studies have been done in the linear response approach in non-interacting theory. We study Magnetoresistivity in a model of Dirac semimetal using...
