Results 31 to 40 of about 100 (58)

New form of the exact NSVZ β-function: the three-loop verification for terms containing Yukawa couplings

Journal of High Energy Physics, 2018
We investigate a recently proposed new form of the exact NSVZ β-function, which relates the β-function to the anomalous dimensions of the quantum gauge superfield, of the Faddeev-Popov ghosts, and of the chiral matter superfields. Namely, for the general
A. E. Kazantsev, V. Yu. Shakhmanov, K. V. Stepanyantz   +2 more
doaj   +1 more source

Formulation for renormalon-free perturbative predictions beyond large-β 0 approximation

Journal of High Energy Physics, 2020
We present a formulation to give renormalon-free predictions consistently with fixed order perturbative results. The formulation has a similarity to Lee’s method in that the renormalon-free part consists of two parts: one is given by a series expansion ...
Hiromasa Takaura
doaj   +1 more source

Factorization at subleading power and endpoint divergences in h → γγ decay. Part II. Renormalization and scale evolution

Journal of High Energy Physics, 2021
Building on the recent derivation of a bare factorization theorem for the b-quark induced contribution to the h → γγ decay amplitude based on soft-collinear effective theory, we derive the first renormalized factorization theorem for a process described ...
Ze Long Liu, Bianka Mecaj, Matthias Neubert, Xing Wang   +3 more
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Wilsonian renormalisation of CFT correlation functions: field theory

Journal of High Energy Physics, 2017
We examine the precise connection between the exact renormalisation group with local couplings and the renormalisation of correlation functions of composite operators in scale-invariant theories.
J. M. Lizana, M. Pérez-Victoria
doaj   +1 more source

Qubits on the horizon: decoherence and thermalization near black holes

Journal of High Energy Physics, 2021
We examine the late-time evolution of a qubit (or Unruh-De Witt detector) that hovers very near to the event horizon of a Schwarzschild black hole, while interacting with a free quantum scalar field.
Greg Kaplanek, C. P. Burgess
doaj   +1 more source

The NSVZ β-function for theories regularized by higher covariant derivatives: the all-loop sum of matter and ghost singularities

Journal of High Energy Physics, 2020
The contributions of the matter superfields and of the Faddeev-Popov ghosts to the β-function of N $$ \mathcal{N} $$ = 1 supersymmetric gauge theories defined in terms of the bare couplings are calculated in all orders in the case of using the higher ...
K. V. Stepanyantz
doaj   +1 more source

Qubit heating near a hotspot

Journal of High Energy Physics, 2021
Effective theories describing black hole exteriors contain many open-system features due to the large number of gapless degrees of freedom that lie beyond reach across the horizon.
G. Kaplanek, C. P. Burgess, R. Holman
doaj   +1 more source

Analytic resurgence in the O(4) model

Journal of High Energy Physics, 2022
We study the perturbative expansion of the ground state energy in the presence of an external field coupled to a conserved charge in the integrable two-dimensional O(4) nonlinear sigma model.
Zoltán Bajnok, János Balog, István Vona   +2 more
doaj   +1 more source

The three-loop Adler D-function for N = 1 $$ \mathcal{N}=1 $$ SQCD regularized by dimensional reduction

Journal of High Energy Physics, 2019
The three-loop Adler D-function for N = 1 $$ \mathcal{N}=1 $$ SQCD in the D R ¯ $$ \overline{\mathrm{DR}} $$ scheme is calculated starting from the three-loop result recently obtained with the higher covariant derivative regularization. For this purpose,
S. S. Aleshin, A. L. Kataev, K. V. Stepanyantz   +2 more
doaj   +1 more source

Two-loop renormalization of the Faddeev-Popov ghosts in N=1 $$ \mathcal{N}=1 $$ supersymmetric gauge theories regularized by higher derivatives

Journal of High Energy Physics, 2018
For the general renormalizable N=1 $$ \mathcal{N}=1 $$ supersymmetric gauge theory we investigate renormalization of the Faddeev-Popov ghosts using the higher covariant derivative regularization. First, we find the two-loop anomalous dimension defined in
A. E. Kazantsev, M. D. Kuzmichev, N. P. Meshcheriakov, S. V. Novgorodtsev, I. E. Shirokov, M. B. Skoptsov, K. V. Stepanyantz   +6 more
doaj   +1 more source