Twistor-inspired construction of electroweak vector boson currents

Journal Article · Fri Jul 15 04:00:00 EDT 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.72.025006· OSTI ID:20711160

Bern, Zvi; Mastrolia, Pierpaolo ^[1]; Forde, Darren; Kosower, David A ^[2]

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1. Department of Physics and Astronomy, UCLA, Los Angeles, California 90095 (United States)
2. Service de Physique Theorique, CEA-Saclay F-91191 Gif-sur-Yvette cedex (France)

We present an extension of the twistor-motivated MHV vertices and accompanying rules presented by Cachazo, Svrcek and Witten to the construction of vector-boson currents coupling to an arbitrary source. In particular, we give rules for constructing off-shell vector-boson currents with one fermion pair and n gluons of arbitrary helicity. These currents may be employed directly in the computation of electroweak amplitudes. The rules yield expressions in agreement with previously-obtained results for Z,W,{gamma}*{yields}qq+n gluons (analytically up to n=3, beyond via the Berends-Giele recursion relations). We also confirm that the contribution to a seven-point amplitude containing the nonabelian triple vector-boson coupling obtained using the next-to-MHV currents matches the previous result in the literature.

• OSTI ID: 20711160
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 2 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
AMPLITUDES
COUPLING
CURRENT ALGEBRA
FERMIONS
GAUGE INVARIANCE
GLUONS
HELICITY
PARTICLE DECAY
PHOTONS
QUANTUM FIELD THEORY
RECURSION RELATIONS
W MINUS BOSONS
W PLUS BOSONS
Z NEUTRAL BOSONS