Addendum to "Helicity conservation in gauge boson scattering at high energy"

Abstract

In a previous paper we have established that for any two-body process involving even numbers of transverse vector bosons and gauginos, the dominant asymptotic amplitudes obey helicity conservation (HC); i.e. the sum of the helicities of the two incoming particles equals to the sum of the helicities of the two outgoing ones. This HC has been proved to all orders in MSSM, provided $(s,|t|,|u|)$ are much larger than all masses in the model; but only to leading 1-loop logarithmic order in SM. In the present addendum, the validity of HC is extended to all two-body processes. Renormalizability is crucial for the HC validity, while all known anomalous couplings violate it.

arXiv comment6 pages, no figures, version to appear in Physical Review D

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• Sudakov expansions at one loop and beyond for charged scalar and fermion pair production in SUSY models at future Linear Colliders
• SUSY Scalar Production in the Electroweak Sudakov Regime of Lepton Colliders
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• Associated tW production at LHC: a complete calculation of electroweak supersymmetric effects at one loop
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