Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Simplifying algebra in Feynman graphs. I. Spinors - art. no. 045012
Autore:
Chalmers, G; Siegel, W;
Indirizzi:
SUNY Stony Brook, Inst Theoret Phys, Stony Brook, NY 11794 USA SUNY Stony Brook Stony Brook NY USA 11794 Phys, Stony Brook, NY 11794 USA
Titolo Testata:
PHYSICAL REVIEW D
fascicolo: 4, volume: 5904, anno: 1999,
pagine: 5012 -
SICI:
0556-2821(19990215)5904:4<5012:SAIFGI>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
YANG-MILLS THEORY; GAUGE-THEORIES; MULTIPLE BREMSSTRAHLUNG; HELICITY AMPLITUDES; GLUON AMPLITUDES; COLLINEAR LIMITS; LOOP AMPLITUDES; QCD AMPLITUDES; HIGH-ENERGIES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
--discip_EC--
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Chalmers, G SUNY Stony Brook, Inst Theoret Phys, Stony Brook, NY 11794 USASUNY Stony Brook Stony Brook NY USA 11794 Brook, NY 11794 USA
Citazione:
G. Chalmers e W. Siegel, "Simplifying algebra in Feynman graphs. I. Spinors - art. no. 045012", PHYS REV D, 5904(4), 1999, pp. 5012

Abstract

We present a general formalism for simplifying manipulations of spin indices of massless and massive spinors and vectors in Feynman diagrams. The formalism is based on covariantly reducing the number of field components in the action in favor of chiral or self-dual fields. In this paper we concentrate on calculational simplifications involving fermions in gauge theories by eliminating half of the components of Dirac spinors. Some results are (1)we find reference momenta for massless fermions analogous to those used for external gauge bosons, (2) many of the known supersymmetry identities (tree and one loop) are seen in a simple manner From the graphs, (3) manipulations with external line factors for massive fermions are unnecessary, and (4) some of the simplifications for nearly maximally helicity violating gluonic amplitudes are built into the Feynman rules. [S0556-2821(98)04924-8].

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/08/20 alle ore 08:08:08