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One-Loop Amplitudes for e^+ e^- to Four Partons
Z. Bern, L. Dixon, D. A. Kosower
We present the first explicit formulae for the complete set of one-loop helicity amplitudes necessary for computing next-to-leading order corrections for e^+ e^- annihilation into…
Neutralino Annihilation into Two Photons
Z. Bern, P. Gondolo, M. Perelstein
We compute the annihilation cross-section of two neutralinos at rest into two photons, which is of importance for the indirect detection of neutralino dark matter in the galactic h…
Advanced Techniques for Multiparton Loop Calculations: A Minireview
Zvi Bern, Lance Dixon, David C. Dunbar +1
We present an overview of techniques developed in recent years for the efficient calculation of one-loop multiparton amplitudes, in particular those relying on unitarity and collin…
Two-Loop N=4 Supersymmetric Amplitudes and QCD
Z. Bern, J. Rozowsky, B. Yan
Two-loop four-gluon N=4 susy amplitudes are evaluated via cutting techniques as a testing ground for QCD. A conjecture for four-point amplitudes to all loop orders is described. We…
Two-Loop Four-Gluon Amplitudes in N=4 Super-Yang-Mills
Z. Bern, J. S. Rozowsky, B. Yan
Using cutting techniques we obtain the two-loop N=4 super-Yang-Mills helicity amplitudes for four-gluon scattering in terms of scalar integral functions. The N=4 amplitudes are con…