Two Photon Distribution Amplitudes
M. El Beiyad, B. Pire, L. Szymanowski, S. Wallon
TL;DR
This paper demonstrates the factorization of the gamma* gamma -> gamma gamma process at low energy and high virtuality, revealing new evolution equations for two-photon distribution amplitudes with logarithmic Q2 behavior.
Contribution
It introduces the factorization framework for the process and derives new inhomogeneous evolution equations for the two-photon distribution amplitudes.
Findings
Distribution amplitudes exhibit ln Q2 behavior
Derived new inhomogeneous evolution equations
Validated factorization at Born order
Abstract
The factorization of the amplitude of the process gamma* gamma -> gamma gamma in the low energy and high photon virtuality region is demonstrated at the Born order and in the leading logarithmic approximation. The leading order two photon (generalized) distribution amplitudes exhibit a characteristic ln Q2 behaviour and obey new inhomogeneous evolution equations.
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Taxonomy
TopicsHigh-Energy Particle Collisions Research · Statistical Mechanics and Entropy · Dark Matter and Cosmic Phenomena