Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Yankielowicz, Shimon"'
It is usually assumed that $4D$ instantons can only arise in non-Abelian theories. In this paper we re-examine this conventional wisdom by explicitly constructing instantons in an Abelian gauge theory: ${\rm QED}_4$ with $N_f$ flavors of Dirac fermio
Externí odkaz:
http://arxiv.org/abs/2406.13738
We construct the Faddeev-Kulish dressed multiparticle states of electrically and magnetically charged particles, incorporating the effects of real and virtual soft photons. We calculate the properties of such dressed states under Lorentz transformati
Externí odkaz:
http://arxiv.org/abs/2209.03369
Publikováno v:
Phys. Rev. D 102, 125034 (2020)
When one of the space-time dimension is compactified on $S^1$, the QCD exhibits the chiral phase transition at some critical radius. When we further turn on a background $\theta$ term which depends on the $S^1$ compactified coordinate, a topological
Externí odkaz:
http://arxiv.org/abs/1909.04082
Publikováno v:
JHEP07(2020)156
In this note we describe hadrons: mesons and baryons as strings with electric charges on their endpoints. We consider here only the neutral system with opposite charges coupled to an external constant electric and magnetic fields. We derive certain c
Externí odkaz:
http://arxiv.org/abs/1906.00976
Using the well-known low-energy effective Lagrangian of QCD --valid for small (non-vanishing) quark masses and a large number of colors-- we study in detail the regions of parameter space where $CP$ is spontaneously broken/unbroken for a vacuum angle
Externí odkaz:
http://arxiv.org/abs/1709.00731
Autor:
Yankielowicz, Shimon, Zhou, Yang
Publikováno v:
JHEP 1704:128,2017
A closed formula of the universal part of supersymmetric R\'enyi entropy $S_q$ for six-dimensional $(1,0)$ superconformal theories is proposed. Within our arguments, $S_q$ across a spherical entangling surface is a cubic polynomial of $\nu=1/q$, with
Externí odkaz:
http://arxiv.org/abs/1702.03518
Following up on recent work by Caron-Huot et al. we consider a generalization of the old Lovelace-Shapiro model as a toy model for Pi-Pi scattering satisfying (most of) the properties expected to hold in ('t Hooft's) large-N limit of massless QCD. In
Externí odkaz:
http://arxiv.org/abs/1701.06315
We consider the large $N$ interacting vector $O(N)$ model on a sphere in $4-\epsilon$ Euclidean dimensions. The Gaussian theory in the UV is taken to be either conformally or non-conformally coupled. The endpoint of the RG flow corresponds to a confo
Externí odkaz:
http://arxiv.org/abs/1512.00791
We consider Euclidean Conformal Field Theories perturbed by quenched disorder, namely by random fluctuations in their couplings. Such theories are relevant for second-order phase transitions in the presence of impurities or other forms of disorder. T
Externí odkaz:
http://arxiv.org/abs/1509.02547
We study a set of examples of holographic duals to theories with spontaneous breaking of conformal invariance in different dimensions. The geometries are domain walls interpolating between two AdS spaces, with a non-trivial background scalar field du
Externí odkaz:
http://arxiv.org/abs/1307.2572