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

M. Kuroda; D. Schildknecht

doi:10.1016/s0550-3213(98)00595-1

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arXiv · hep-ph/9807250

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

M. Kuroda·D. Schildknecht

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Abstract

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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M. Kuroda, D. Schildknecht. 1998-07-06. A Simple Born-Form Approximation for e^+ e^- to W^+W^- at One Loop. https://doi.org/10.1016/s0550-3213(98)00595-1

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