Infrared renormalons in kinematic distributions for hadron collider processes
Journal of High Energy Physics, 2021 Infrared renormalons in Quantum Chromodynamics are associated with non-perturbative corrections to short distance observables. Linear renormalons, i.e. such that the associated non-perturbative corrections scale like one inverse power of the hard scale ...
Silvia Ferrario Ravasio +2 more
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Resurgence and self-completion in renormalized gauge theories [PDF]
International Journal of Modern Physics A, 2023 Under certain assumptions and independent of the instantons, we show that the logarithm expansion of dimensional regularization in quantum field theory needs a nonperturbative completion to have a renormalization group flow valid at all energies.
Alessio Maiezza, J. Vasquez
semanticscholar +1 more source
Resurgence and semiclassical expansion in two-dimensional large-N sigma models [PDF]
Journal of High Energy Physics, 2021 The resurgence structure of the 2d O(N) sigma model at large N is studied with a focus on an IR momentum cutoff scale a that regularizes IR singularities in the semiclassical expansion.
Hiromichi Nishimura +4 more
semanticscholar +1 more source
Inverse magnetic catalysis and regularization in the quark-meson model [PDF]
Journal of High Energy Physics, 2014 A bstractMotivated by recent work on inverse magnetic catalysis at finite temperature, we study the quark-meson model using both dimensional regularization and a sharp cutoff.
J. Andersen, W. Naylor, A. Tranberg
semanticscholar +2 more sources
Non-Wilsonian ultraviolet completion via transseries [PDF]
, 2020 We study some of the implications for the perturbative renormalization program when augmented with the Borel-Ecalle resummation. We show the emergence of a new kind of non-perturbative fixed point for the scalar $\phi^4$ model, representing an ...
Alessio Maiezza, J. Vasquez
semanticscholar +1 more source
Towards general scalar-Yukawa renormalisation group equations at three-loop order
Journal of High Energy Physics, 2021 For arbitrary four-dimensional quantum field theories with scalars and fermions, renormalisation group equations in the MS ¯ $$ \overline{\mathrm{MS}} $$ scheme are investigated at three-loop order in perturbation theory.
Tom Steudtner
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Power corrections in the single dressed gluon approximation - the average thrust as a case study [PDF]
, 1999 Infrared power corrections for Minkowskian QCD observables are analyzed in the framework of renormalon resummation, motivated by analogy with the skeleton expansion in QED and the BLM approach.
E. Gardi, G. Grunberg
semanticscholar +2 more sources
Asymptotic freedom and higher derivative gauge theories
Journal of High Energy Physics, 2021 The ultraviolet completion of gauge theories by higher derivative terms can dramatically change their behavior at high energies. The requirement of asymptotic freedom imposes very stringent constraints that are only satisfied by a small family of higher ...
M. Asorey, F. Falceto, L. Rachwał
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Unruh-DeWitt detector responses for complex scalar fields in de Sitter spacetime
Journal of High Energy Physics, 2021 We derive the response function for a comoving, pointlike Unruh-DeWitt particle detector coupled to a complex scalar field ϕ, in the (3 + 1)-dimensional cosmological de Sitter spacetime.
Md Sabir Ali +2 more
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Global Time-Renormalization of the Gravitational N-body Problem
SIAM Journal on Applied Dynamical Systems, 2020 This work considers the gravitational N-body problem and introduces time-reparametrization functions that allow to define globally solutions of the N-body equations.
M. Antoñana +3 more
semanticscholar +1 more source