Measurement of theWWγ vertex through single photon production ate+e−

Abstract

We perform a detailed study of the process e + e − → γν lνl and its sensitivity to anomalous gauge boson couplings of the γW W vertex. We concentrate on LEP II energies, √ s = 200 GeV, and energies appropriate to the proposed Next Linear Collider (NLC) high energy e + e − collider with center of mass energies √ s = 500 and 1 TeV. At 200 GeV, the process offers, at best, a consistency check of other processes being considered at LEP200. At 500 GeV, the parameters κ γ and λ γ can be measured to about ±0.05 and ±0.1 respectively at 95% C.L. while at 1 TeV, they can be measured to about ±0.02. At the high luminosities anticipated at high energy linear colliders precision measurements are likely to be limited by systematic rather than statistical errors.

Single-W production to test triple gauge boson couplings at LEP

“…The expected sensitivity limits are, however, substantially weaker at the energy region accessible to LEP [2] because the diagram involved in this channel is WW fusion type.…”

“…One way to avoid such complications is to use the reaction e + e − → ν νγ where only the structure of the W W γ coupling can be studied [2,3]. The expected sensitivity limits are, however, substantially weaker at the energy region accessible to LEP [2] because the diagram involved in this channel is WW fusion type.…”

W-pair production in the processe+e−Gintner1, Godfrey2, Couture3 1995Phys. Rev. DSelf Cite14090View full textAdd to dashboardCite

“…It is expected that measurements at high energy e + e − colliders will surpass those at the hadron colliders. As a result, many processes have been studied to determine their usefulness for measuring the TGV's; eγ → νW [18][19][20][21], e − e − → e − W − ν e [22], γγ → W + W − [18,23], e + e − → Zν ν [24][25][26], e + e − → γν ν [6,27,28], e + e − → W + W − [2,11,[29][30][31][32][33] and more detailed studies of various four fermion final states in the process e + e − → W + W − → f f f ′ f ′ [34,24,35,36].…”

The impact of LEP 2 data on possible anomalous enhancements of

“…1 CP-violating terms are constrained by the neutron and electron electric dipole moments [6]. CP-conserving anomalous couplings affect low-energy rare decays [7], W production processes at high scales (LEP 2 and Tevatron) and electroweak corrections to the W ,Z, γ propagator ("oblique corrections").…”