Results 41 to 50 of about 582,899 (222)
Topology in full QCD at high temperature: a multicanonical approach
Journal of High Energy Physics, 2018 We investigate the topological properties of N f = 2 + 1 QCD with physical quark masses, at temperatures around 500 MeV. With the aim of obtaining a reliable sampling of topological modes in a regime where the fluctuations of the topological charge Q are
Claudio Bonati +5 more
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Journal of High Energy Physics, 2021 We study neutral fermions pair creation with anomalous magnetic moment from the vacuum by time-independent magnetic-field inhomogeneity as an external background. We show that the problem is technically reduced to the problem of charged-particle creation
T. C. Adorno +3 more
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Nonperturbative renormalization for 2PI effective action techniques [PDF]
Annals of Physics, 2005 Nonperturbative approximation schemes based on two-particle irreducible (2PI) effective actions provide an important means for our current understanding of (non-)equilibrium quantum field theory. A remarkable property is their renormalizability, since these approximations involve selective summations to infinite perturbative orders.
Szabolcs Borsanyi +4 more
openaire +7 more sources
Nonperturbative and Perturbative Aspects of Photo- and Electroproduction of Vector Mesons [PDF]
Eur.Phys.J.C51:83-101,2007, 2006 We discuss various aspects of vector meson production, first analysing the interplay between perturbative and nonperturbative aspects of the QCD calculation. Using a general method adapted to incorporate both perturbative and nonpertubative aspects, we show that nonperturbative effects are important for all experimentally available values of the photon
arxiv +2 more sources
The axion quality problem: global symmetry breaking and wormholes
Journal of High Energy Physics, 2021 Continuous global symmetries are expected to be broken by gravity, which can lead to important phenomenological consequences. A prime example is the threat that this poses to the viability of the Peccei-Quinn solution to the strong CP problem.
James Alvey, Miguel Escudero
doaj +1 more source
Tunnelling of charged particles from black holes
Journal of High Energy Physics, 2020 We state and explain the total rate at which a charged non-rotating black hole emits charged particles, taking into account both Hawking radiation and Schwinger pair production simultaneously.
George Johnson
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Emergent symmetry in Brownian SYK models and charge dependent scrambling
Journal of High Energy Physics, 2022 In this work, we introduce a symmetry-based approach to study the scrambling and operator dynamics of Brownian SYK models at large finite N and in the infinite N limit.
Lakshya Agarwal, Shenglong Xu
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Effects of nonperturbative improvement in quenched hadron spectroscopy [PDF]
Nuclear Physics B - Proceedings Supplements, 1999 We discuss a comparative analysis of unimproved and nonperturbatively improved quenched hadron spectroscopy, on a set of 104 gauge configurations, at beta=6.2. We also present here our results for meson decay constants, including the constants f_D and f_Ds in the charm-quark region.
Tereza Mendes +2 more
openaire +4 more sources
Drell-Yan angular lepton distributions at small x from TMD factorization.
Journal of High Energy Physics, 2021 The Drell-Yan process is studied in the framework of TMD factorization in the Sudakov region s » Q 2 » q ⊥ 2 $$ {q}_{\perp}^2 $$ corresponding to recent LHC experiments with Q 2 of order of mass of Z-boson and transverse momentum of DY pair ∼ few tens ...
Ian Balitsky
doaj +1 more source
Numerical study of multiparticle scattering in λϕ 4 theory
Journal of High Energy Physics, 2018 We study numerically classical collisions of waves in λϕ 4 theory. These processes correspond to multiparticle scattering in the semiclassical regime.
S. V. Demidov, B. R. Farkhtdinov
doaj +1 more source