Results 1 to 10 of about 122 (77)

Mass sum rules of the electron in quantum electrodynamics

Journal of High Energy Physics, 2020
Different decompositions of the nucleon mass, in terms of the masses and energies of the underlying constituents, have been proposed in the literature. We explore the corresponding sum rules in quantum electrodynamics for an electron at one-loop order in
S. Rodini, A. Metz, B. Pasquini
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The NSVZ relations for N $$ \mathcal{N} $$ = 1 supersymmetric theories with multiple gauge couplings

Journal of High Energy Physics, 2021
We investigate the NSVZ relations for N $$ \mathcal{N} $$ = 1 supersymmetric gauge theories with multiple gauge couplings. As examples, we consider MSSM and the flipped SU(5) model, for which they easily reproduce the results for the two-loop β-functions.
D. S. Korneev, D. V. Plotnikov, K. V. Stepanyantz, N. A. Tereshina   +3 more
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On a realization of {β}-expansion in QCD

Journal of High Energy Physics, 2017
We suggest a simple algebraic approach to fix the elements of the {β}-expansion for renormalization group invariant quantities, which uses additional degrees of freedom.
S.V. Mikhailov
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General non-leptonic ∆F = 1 WET at the NLO in QCD

Journal of High Energy Physics, 2021
We reconsider the complete set of four-quark operators in the Weak Effective Theory (WET) for non-leptonic ∆F = 1 decays that govern s → d and b → d, s transitions in the Standard Model (SM) and beyond, at the Next-to-Leading Order (NLO) in QCD.
Jason Aebischer, Christoph Bobeth, Andrzej J. Buras, Jacky Kumar, Mikołaj Misiak   +4 more
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All-orders behaviour and renormalons in top-mass observables

Journal of High Energy Physics, 2019
We study a simplified model of top production and decay, consisting in a virtual vector boson W * decaying into a massive-massless t- b ¯ $$ \overline{b} $$ quark-antiquark pair.
Silvia Ferrario Ravasio, Paolo Nason, Carlo Oleari   +2 more
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Derivation of functional equations for Feynman integrals from algebraic relations

Journal of High Energy Physics, 2017
New methods for obtaining functional equations for Feynman integrals are presented. The application of these methods to finding functional equations for various one- and two-loop integrals is described in detail.
O. V. Tarasov
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On Itzykson-Zuber Ansatz

Journal of High Energy Physics, 2019
We apply the renormalized coupling constants and Virasoro constraints to derive the Itzykson-Zuber Ansatz on the form of the free energy in 2D topological gravity.
Qingsheng Zhang, Jian Zhou
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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
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One-loop matching for quark dipole operators in a gradient-flow scheme

Journal of High Energy Physics, 2022
The quark chromoelectric dipole (qCEDM) operator is a CP-violating operator describing, at hadronic energies, beyond-the-standard-model contributions to the electric dipole moment of particles with nonzero spin.
Emanuele Mereghetti, Christopher J. Monahan, Matthew D. Rizik, Andrea Shindler, Peter Stoffer   +4 more
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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
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