منابع مشابه
One loop multiphoton helicity amplitudes.
We use the solutions to the recursion relations for double-off-shell fermion currents to compute helicity amplitudes for n-photon scattering and electronpositron annihilation to photons in the massless limit of QED. The form of these solutions is simple enough to allow all of the integrations to be performed explicitly. For n-photon scattering, we find that unless n = 4, the amplitudes for the ...
متن کاملOne - Loop n - Point Helicity Amplitudes in ( Self - Dual ) Gravity
We present an ansatz for all one-loop amplitudes in pure Einstein gravity for which the n external gravitons have the same outgoing helicity. These loop amplitudes, which are rational functions of the momenta, also arise in the quantization of self-dual gravity in four-dimensional Minkowski space. Our ansatz agrees with explicit computations via D-dimensional unitarity cuts for n ≤ 6. It also h...
متن کاملOne-Loop Helicity Amplitudes for Parton Level Virtual Compton Scattering
We calculate the one-loop QCD virtual corrections to all helicity amplitudes for parton level virtual Compton scattering processes. We include the amplitudes both on quark target process γq → γq and on gluon target process γg → γg. The infrared pole structure of the amplitudes is in agreement with the prediction of Catani’s general formalism for the singularities of one-loop amplitudes, while e...
متن کاملMultigluon helicity amplitudes involving a quark loop.
We apply the solution to the recursion relation for the double-off-shell quark current to the problem of computing one loop amplitudes with an arbitrary number of gluons. We are able to compute amplitudes for photon-gluon scattering, electron-positron annihilation to gluons, and gluon-gluon scattering via a quark loop in the case of like-helicity gluons. In addition, we present the result for t...
متن کاملOne-loop φ-MHV amplitudes using the unitarity bootstrap: the general helicity case
We consider a Higgs boson coupled to gluons via the five-dimensional effective operator HtrGμνG μν . We treat H as the real part of a complex field φ that couples to the selfdual gluon field strengths and compute the one-loop corrections to the φ-MHV amplitudes involving φ, two negative helicity gluons and an arbitrary number of positive helicity gluons. Our results generalise earlier work wher...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1994
ISSN: 0556-2821
DOI: 10.1103/physrevd.49.2197