A Simple Born-Form Approximation for e^+ e^- to W^+W^- at One Loop

Details A Simple Born-Form Approximation for e^+ e^- to W^+W^- at One Loop A Simple Born-Form Approximation for e^+ e^- to W^+W^- at One Loop

1998-07-06

arxiv.org/abs/hep-ph/9807250v1

Nucl.Phys. B531 (1998) 24-48

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, 3 Postscript figures, uses epsf.sty

Scientific paper

10.1016/S0550-3213(98)00595-1

A simple Born-form approximation at the one-loop level for e^+e^- to W^+ W^- at high energies is given in analytic form. The different contributions to the three invariant one-loop amplitudes, S_I^{(-)}(s,t) and S_Q^{(\pm)}(s,t), determining the Born-form helicity amplitudes are thoroughly investigated analytically and numerically. At energies above 500 GeV, the accuracy of the simple Born-form approximation for the differential production cross section is better than 1% for almost all W^+W^- production angles, independently of whether the W^+W^- polarization is summed over, or whether a longitudinal or a transverse polarization is selected for both the W^+ and the W^-.

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