Results 121 to 130 of about 2,214 (215)

The asymptotically-free gauge theories

Journal of High Energy Physics
We show how to classify the asymptotically-free gauge theories in four spacetime dimensions, focussing here on the case of purely fermionic matter. The classification depends on the fact (which we prove) that the dimension and Dynkin index of irreducible
Ben Gripaios, Khoi Le Nguyen Nguyen
doaj   +1 more source

Renormalization without regularization and R-operation

, 1994
Definition of Feynman integrals as solutions of some well defined systems of differential equations is proposed. This definition is equivalent to usual one but needs no regularization and application of $R$-operation. It is argued that proposed renormalization scheme maintains all symmetries that can be maintained in perturbative quantum field theory ...
openaire   +2 more sources

Non-perturbative renormalization of left-left four-fermion operators in quenched lattice QCD

, 2005
We define a family of Schroedinger Functional renormalization schemes for the four-quark multiplicatively renormalizable operators of the $\Delta F = 1$ and $\Delta F = 2$ effective weak Hamiltonians. Using the lattice regularization with quenched Wilson
Guagnelli, M., Vladikas, A., Pena, C., Sint, S., Heitger, J.   +4 more
core   +1 more source

Renormalization-group equations of the LEFT at two loops: dimension-six operators

Journal of High Energy Physics
We present the third part of a systematic calculation of the two-loop anomalous dimensions for the low-energy effective field theory below the electroweak scale (LEFT): insertions of dimension-six operators that conserve baryon number.
Luca Naterop, Peter Stoffer
doaj   +1 more source

Two-loop anomalous dimensions in the LEFT: dimension-six four-fermion operators in NDR

Journal of High Energy Physics
We derive the complete set of two-loop anomalous dimensions describing the mixing of four-fermion operators in the Low Energy Effective Field Theory (LEFT).
Jason Aebischer, Pol Morell, Marko Pesut, Javier Virto   +3 more
doaj   +1 more source

Soft factorisation and exponentiation from Schwinger-space geometry

Journal of High Energy Physics
Infrared divergences in Quantum Field Theory govern the low-energy dynamics of many physical theories, and their understanding is a crucial ingredient in predicting the outcomes of collider experiments.
Carolina Figueiredo, Giulio Gambuti, Holmfridur S. Hannesdottir   +2 more
doaj   +1 more source

Non-perturbative renormalisation and improvement of non-singlet tensor currents in N f = 3 QCD

Journal of High Energy Physics
Hadronic matrix elements involving tensor currents play an important rôle in decays that allow to probe the consistency of the Standard Model via precision lattice QCD calculations. The non-singlet tensor current is a scale-dependent (anomalous) quantity.
Leonardo Chimirri, Patrick Fritzsch, Jochen Heitger, Fabian Joswig, Marco Panero, Carlos Pena, David Preti   +6 more
doaj   +1 more source

P-wave Sommerfeld enhancement near threshold: a simplified approach. [PDF]

Eur Phys J C Part Fields, 2023
de Lima CH, Tonero A, Vasquez A, Rosenfeld R.   +3 more
europepmc   +1 more source

Dimensional renormalization: Ladders and rainbows

, 1996
Renormalization factors are most easily extracted by going to the massless limit of the quantum field theory and retaining only a single momentum scale.
Thompson, G (14706295), Robert Delbourgo (14735098), Kalloniatis, AC (15475778)   +2 more
core  

Scaling of nonperturbative renormalization of composite operators with overlap fermions [PDF]

, 2005
Copyright © 2005. All rights reserved. Printed in U.S.A. Submitted to Cornell University’s online archive www.arXiv.org in 2005 by Jianbo Zhang. Post-print sourced from www.arxiv.org.We compute non-perturbatively the renormalization constants of ...
Leinweber, D., Williams, A., Zhang, J.
core