Results 11 to 20 of about 1,107 (89)
Exploring the θ-vacuum structure in the functional renormalization group approach
Journal of High Energy Physics, 2022 We investigate the θ-vacuum structure and the ’t Hooft anomaly at θ = π in a simple quantum mechanical system on S 1 to scrutinize the applicability of the functional renormalization group (fRG) approach.
Kenji Fukushima +2 more
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Unitary quantization of a scalar charged field and Schwinger effect
Journal of High Energy Physics, 2020 Quantum field theory in curved spacetimes suffers in general from an infinite ambiguity in the choice of Fock representation and associated vacuum. In cosmological backgrounds, the requirement of a unitary implementation of the field dynamics in the ...
Luis J. Garay +2 more
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Quantum distillation of Hilbert spaces, semi-classics and anomaly matching
Journal of High Energy Physics, 2018 A symmetry-twisted boundary condition of the path integral provides a suitable framework for the semi-classical analysis of nonperturbative quantum field theories (QFTs), and we reinterpret it from the viewpoint of the Hilbert space. An appropriate twist
Gerald V. Dunne +2 more
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Journal of High Energy Physics, 2023 Nonlinear sigma models on de Sitter background have proved a useful prototype for quantum gravity in summing the large logarithms which arise from loop corrections.
R. P. Woodard, B. Yesilyurt
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Hawking radiation of extended objects
Journal of High Energy Physics, 2020 We compute the effects on the temperature and precise spectrum of Hawking radiation from a Schwarzschild black hole when the emitted object is taken to be spatially extended.
George Johnson, John March-Russell
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Gentle introduction to rigorous Renormalization Group: a worked fermionic example
Journal of High Energy Physics, 2021 Much of our understanding of critical phenomena is based on the notion of Renormalization Group (RG), but the actual determination of its fixed points is usually based on approximations and truncations, and predictions of physical quantities are often of
Alessandro Giuliani +2 more
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Quantum unitary dynamics of a charged fermionic field and Schwinger effect
Journal of High Energy Physics, 2021 In quantum field theory, particle creation occurs, in general, when an intense external field, such as an electromagnetic field, breaks time translational invariance. This leads to an ambiguity in the definition of the vacuum state.
Álvaro Álvarez-Domínguez +3 more
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Hadronic corrections to μ-e scattering at NNLO with space-like data
Journal of High Energy Physics, 2019 The Standard Model prediction for μ-e scattering at Next-to-Next-to-Leading Order (NNLO) contains non-perturbative QCD contributions given by diagrams with a hadronic vacuum polarization insertion in the photon propagator.
Matteo Fael
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The Exact WKB analysis and the Stokes phenomena of the Unruh effect and Hawking radiation
Journal of High Energy Physics, 2022 The physical observables of quantum theory can be described by perturbation theory, which is often given by diverging power series. This divergence is connected to the existence of non-perturbative phenomena, where resurgence allows us to study this ...
Seishi Enomoto, Tomohiro Matsuda
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Journal of High Energy Physics, 2021 We calculate, for the first time, the NNLO QCD corrections to identified heavy hadron production at hadron colliders. The calculation is based on a flexible numeric framework which allows the calculation of any distribution of a single identified heavy ...
Michał Czakon +3 more
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