Results 21 to 30 of about 138 (86)
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 +3 more
doaj +1 more source
Power corrections and renormalon resummation for the average thrust [PDF]
, 1999 Infrared power corrections for the average thrust in e+e− annihilation 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 +1 more source
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
doaj +1 more source
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 +4 more
doaj +1 more source
Pion valence quark distribution at physical pion mass of N f=2+1+1 lattice QCD [PDF]
Journal of Physics G: Nuclear and Particle PhysicsWe present a state-of-the-art calculation of the unpolarized pion valence-quark distribution in the framework of large-momentum effective theory (LaMET) with improved handling of systematic errors as well as two-loop perturbative matching.
Jack Holligan, Huey-Wen Lin
semanticscholar +1 more source
A Short Review on Recent Developments in TMD Factorization and Implementation
Advances in High Energy Physics, Volume 2019, Issue 1, 2019., 2019 In the latest years the theoretical and phenomenological advances in the factorization of several collider processes using the transverse momentum dependent distributions (TMD) have greatly increased. I attempt here a short resume of the newest developments discussing also the most recent perturbative QCD calculations. The work is not strictly directed
Ignazio Scimemi, Zhongbo Kang
wiley +1 more source
Advances in High Energy Physics, Volume 2008, Issue 1, 2008., 2008 We show that it is possible to improve the infrared aspects of the standard treatment of the DGLAP‐CS evolution theory to take into account a large class of higher‐order corrections that significantly improve the precision of the theory for any given level of fixed‐order calculation of its respective kernels.
B. F. L. Ward, A. Petrov
wiley +1 more source
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 +2 more
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source