Measurement of the WWγ coupling in the process eγ→νqq̄ off the W-boson resonance

Michael A. Doncheski, Stephen Godfrey, K. Andrew Peterson

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We study the WWγ gauge boson coupling in the process eγ→νqq̄ off the W-boson resonance by evaluating the helicity amplitudes of all contributing Feynman diagrams. We examine this process for 500 GeV and 1 TeV e+e- colliders including the photon spectra obtained from both a backscattered laser and from beamstrahlung radiation. The couplings could best be measured using the backscattered laser photons with |δκγ| ≤=0.08 and -0.07<λ<0.10 at a 500 GeV collider and |λγ|≤0.03 at a 1 TeV collider, all at 95% C.L. Except for the relatively weak limits on δκ at √s = 1 TeV, these sensitivities are the same order of magnitude as can be obtained from real single W-production demonstrating that additional information can be obtained from non-resonant final states.

Original languageEnglish (US)
Pages (from-to)1-4
Number of pages4
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume59
Issue number11
StatePublished - Jun 1 1999

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bosons
Feynman diagrams
photons
lasers
sensitivity
radiation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "We study the WWγ gauge boson coupling in the process eγ→νqq̄ off the W-boson resonance by evaluating the helicity amplitudes of all contributing Feynman diagrams. We examine this process for 500 GeV and 1 TeV e+e- colliders including the photon spectra obtained from both a backscattered laser and from beamstrahlung radiation. The couplings could best be measured using the backscattered laser photons with |δκγ| ≤=0.08 and -0.07<λ<0.10 at a 500 GeV collider and |λγ|≤0.03 at a 1 TeV collider, all at 95{\%} C.L. Except for the relatively weak limits on δκ at √s = 1 TeV, these sensitivities are the same order of magnitude as can be obtained from real single W-production demonstrating that additional information can be obtained from non-resonant final states.",
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Measurement of the WWγ coupling in the process eγ→νqq̄ off the W-boson resonance. / Doncheski, Michael A.; Godfrey, Stephen; Peterson, K. Andrew.

In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 59, No. 11, 01.06.1999, p. 1-4.

Research output: Contribution to journalArticle

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