Results 21 to 30 of about 122 (77)

A discussion on leading renormalon in the pole mass

Journal of High Energy Physics, 2017
Perturbative series of some quantities in quantum field theories, such as the pole mass of a quark, suffer from a kind of divergence called renormalon divergence.
J. Komijani
doaj   +1 more source

Renormalized holographic subregion complexity under relevant perturbations

Journal of High Energy Physics, 2020
We construct renormalized holographic entanglement entropy (HEE) and subregion complexity (HSC) in the CV conjecture for asymptotically AdS4 and AdS5 geometries under relevant perturbations.
Dongmin Jang, Yoonbai Kim, O-Kab Kwon, D. D. Tolla   +3 more
doaj   +1 more source

Ultraviolet phenomena in AdS self-interacting quantum field theory

Journal of High Energy Physics, 2018
We study the one-loop corrections to the four-point function in the Anti de Sitter space-time for a ϕ 4 field theory. Our calculation shows the existence of non-local counterterms which however respect the AdS isometry.
Emil T. Akhmedov, Ugo Moschella, Fedor K. Popov   +2 more
doaj   +1 more source

The swampland conjecture and the Higgs expectation value

Journal of High Energy Physics, 2018
The recently proposed de Sitter swampland conjecture excludes local extrema of a scalar potential with a positive energy density in a low energy effective theory.
Koichi Hamaguchi, Masahiro Ibe, Takeo Moroi   +2 more
doaj   +1 more source

Hot cosmic qubits: late-time de Sitter evolution and critical slowing down

Journal of High Energy Physics, 2020
Temporal evolution of a comoving qubit coupled to a scalar field in de Sitter space is studied with an emphasis on reliable extraction of late-time behaviour.
Greg Kaplanek, C.P. Burgess
doaj   +1 more source

Resurgence and self-completion in renormalized gauge theories [PDF]

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.
Vasquez, Juan Carlos, Maiezza, Alessio
core   +2 more sources

Two-loop renormalization of the matter superfields and finiteness of N $$ \mathcal{N} $$ = 1 supersymmetric gauge theories regularized by higher derivatives

Journal of High Energy Physics, 2020
The two-loop anomalous dimension of the chiral matter superfields is calculated for a general N $$ \mathcal{N} $$ = 1 supersymmetric gauge theory regularized by higher covariant derivatives.
A. E. Kazantsev, K. V. Stepanyantz
doaj   +1 more source

The Abelian Higgs model under a gauge invariant looking glass: exploiting new Ward identities for gauge invariant operators and the Equivalence Theorem

Journal of High Energy Physics, 2021
The content of two additional Ward identities exhibited by the U(1) Higgs model is exploited. These novel Ward identities can be derived only when a pair of local composite operators providing a gauge invariant setup for the Higgs particle and the ...
D. Dudal, G. Peruzzo, S. P. Sorella
doaj   +1 more source

Exact renormalization of the photino mass in softly broken N $$ \mathcal{N} $$ = 1 SQED with N f flavors regularized by higher derivatives

Journal of High Energy Physics, 2017
We consider the softly broken N $$ \mathcal{N} $$ = 1 supersymmetric electrodynamics, regularized by higher derivatives. For this theory we demonstrate that the renormalization of the photino mass is determined by integrals of double total derivatives in
I. V. Nartsev, K. V. Stepanyantz
doaj   +1 more source

Hot accelerated qubits: decoherence, thermalization, secular growth and reliable late-time predictions

Journal of High Energy Physics, 2020
We compute how an accelerating qubit coupled to a scalar field — i.e. an Unruh-DeWitt detector — evolves in flat space, with an emphasis on its late-time behaviour.
Greg Kaplanek, C. P. Burgess
doaj   +1 more source