Results 111 to 120 of about 36,165 (249)
Off-shell structure of the string sigma model
, 1999 The off-shell structure of the string sigma model is investigated. In the open bosonic string, nonperturbative effects are shown to depend crucially on the regularization scheme.
Kostelecky, Alan +2 more
core +1 more source
Large-order behavior and nonperturbative effects [PDF]
Nuclear Physics B, 1995 Abstract We consider the energy-dependence of the large-order behavior of forward scattering amplitudes in theories having explicit mass parameters and instanton solutions. We show that in weak coupling theories the exponential part of the Espinosa-Ringwald type cross section can be determined by taking the minimum element of the perturbative series,
openaire +2 more sources
Heavy Quarkonium States With Baryonic Chemical Potential
Advances in High Energy Physics, Volume 2025, Issue 1, 2025.In this work, we have studied the dissociation behavior of 1S and 2S states of quarkonium using quasiparticle approach where the Debye mass depends on baryonic chemical potential. The binding energies of the quarkonium states has been obtained by using quasiparticle Debye mass which further depends on temperature and baryonic chemical potential (μb ...
Siddhartha Solanki +3 more
wiley +1 more source
Elliptic genus derivation of 4d holomorphic blocks
Journal of High Energy Physics, 2018 We study elliptic vortices on ℂ × T 2 by considering the 2d quiver gauge theory describing their moduli spaces. The elliptic genus of these moduli spaces is the elliptic version of vortex partition function of the 4d theory. We focus on two examples: the
Matteo Poggi
doaj +1 more source
T‐Symmetry in String Geometry Theory
Advances in High Energy Physics, Volume 2025, Issue 1, 2025.String geometry theory is one of the candidates of nonperturbative formulation of string theory. In this paper, we have shown that dimensionally reduced string geometry theories have what we call T‐symmetry. In the case of the dimensional reduction in space‐like directions, the T‐symmetry transformation gives the T‐dual transformation between the Type ...
Matsuo Sato +2 more
wiley +1 more source
Quantum fermion superradiance and vacuum ambiguities on charged black holes
Journal of High Energy PhysicsUnlike a classical charged bosonic field, a classical charged fermion field on a static charged black hole does not exhibit superradiant scattering. We demonstrate that the quantum analogue of this classical process is however present.
Álvaro Álvarez-Domínguez +1 more
doaj +1 more source
Limits of TMD evolution in SIDIS at moderate Q
EPJ Web of Conferences, 2015 We investigate semi-inclusive deep inelastic scattering measurements in the region of relatively small Q, where sensitivity to nonperturbative transverse momentum dependence can dominate the evolution.
Gamberg Leonard
doaj +1 more source
Nonperturbative effects of Topological Theta-term
, 2011 We study the effects of a topological Theta-term on 2+1 dimensional principal chiral models (PCM), which are nonlinear sigma models defined on Lie group manifolds. We find that when Theta = pi, the nature of the disordered phase of the principal chiral model is strongly affected by the topological term: it is either a gapless conformal field theory, or
Xu, Cenke, Ludwig, Andreas W. W.
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Reducible contributions to quantum electrodynamics in external fields
Journal of High Energy Physics, 2019 We consider one-particle reducible (1PR) contributions to QED and scalar QED processes in external fields, at one-loop and two-loop order. We investigate three cases in detail: constant crossed fields, constant magnetic fields, and plane waves.
Naser Ahmadiniaz +2 more
doaj +1 more source
Electroweak vacuum stability in the Higgs-Dilaton theory
Journal of High Energy Physics, 2017 We study the stability of the Electroweak (EW) vacuum in a scale-invariant extension of the Standard Model and General Relativity, known as a Higgs-Dilaton theory.
A. Shkerin
doaj +1 more source