Results 51 to 60 of about 541 (80)

Instanton liquid properties from lattice QCD

Journal of High Energy Physics, 2018
We examined the instanton contribution to the QCD configurations generated from lattice QCD for N F = 0, N F = 2 + 1 and N F = 2 + 1 + 1 dynamical quark flavors from two different and complementary approaches.
A. Athenodorou, Ph. Boucaud, F. De Soto, J. Rodríguez-Quintero, S. Zafeiropoulos   +4 more
doaj   +1 more source

Oscillons in AdS space

Journal of High Energy Physics
We study oscillons in a real scalar field theory in a (3+1)-dimensional AdS space with global coordinates. The initial configuration is given by a Gaussian shape with an appropriate core size as in Minkowski spacetime.
Takaaki Ishii, Takaki Matsumoto, Kanta Nakano, Ryosuke Suda, Kentaroh Yoshida   +4 more
doaj   +1 more source

Cosmic string in Abelian-Higgs model with enhanced symmetry - Implication to the axion domain-wall problem. [PDF]

J High Energy Phys, 2020
Hiramatsu T, Ibe M, Suzuki M.
europepmc   +1 more source

Constrained instantons in scalar field theories

Journal of High Energy Physics
Instantons, localised saddle points of the action, play an important role in describing non-perturbative aspects of quantum field theories, for example vacuum decay or violation of conservation laws associated with anomalous symmetries.
Benjamin Elder, Kinga Gawrych, Arttu Rajantie   +2 more
doaj   +1 more source

JNR Skyrmions

Journal of High Energy Physics
The JNR ansatz provides a simple formula to obtain families of charge N self-dual SU(2) Yang-Mills instantons in four-dimensional Euclidean space, from the free data of N + 1 distinct points with associated positive weights.
Paul Sutcliffe
doaj   +1 more source

Instabilities of gauged Q-balls

Journal of High Energy Physics
We present the first analytical calculation that shows that perturbations with angular dependence can lead to an instability in gauged Q-balls. We find an explicit condition on the parameters for the Q-ball to become unstable.
Arvind Rajaraman
doaj   +1 more source

The inevitability of sphalerons in field theory. [PDF]

Philos Trans A Math Phys Eng Sci, 2019
Manton NS.
europepmc   +1 more source

The metamorphosis of semi-classical mechanisms of confinement: from monopoles on ℝ 3 × S 1 to center-vortices on ℝ 2 × T 2

Journal of High Energy Physics
There are two distinct regimes of Yang-Mills theory where we can demonstrate confinement, the existence of a mass gap, and the multi-branch structure of the effective potential as a function of the theta angle using a reliable semi-classical calculation.
Canberk Güvendik, Thomas Schaefer, Mithat Ünsal   +2 more
doaj   +1 more source

Massless monopole-string-domain wall fermions and polyhedral vacuum fermions

Journal of High Energy Physics
Fermion zero modes of Bogomol’nyi-Prasad-Sommerfield monopole-string-domain wall composites in three spatial dimensions are studied. We analytically solve the Dirac equation and prove the existence of one fermion zero mode.
Minoru Eto, Yuito Suzuki
doaj   +1 more source

Brane Effective Actions, Kappa-Symmetry and Applications. [PDF]

Living Rev Relativ, 2012
Simón J.
europepmc   +1 more source