Diphoton generalized distribution amplitudes

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 13 Aug 2008Embargo end date: 01 Jan 2008 France English Publisher:American Physical Society (APS)Journal:Physical Review D, volume 78 (issn: 1550-7998, eissn: 1550-2368,

Copyright policy )Funded by:FCT | D4, ANR | DenseQCD

Authors: Beiyad, M. El; Pire, B.; Szymanowski, L.; Wallon, S.;

doi: 10.1103/physrevd.78.034009 , 10.48550/arxiv.0806.1098

arXiv: 0806.1098

Diphoton generalized distribution amplitudes

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Abstract

We calculate the leading order diphoton generalized distribution amplitude by calculating the amplitude of the process gamma* gamma -> gamma gamma in the low energy and high photon virtuality region at the Born order and in the leading logarithmic approximation. As in the case of the anomalous photon structure functions, the gamma gamma generalized distribution amplitude exhibits a characteristic \ln Q^2 behaviour and obeys inhomogeneous evolution equations.

15 pages, 5 figures

Country

France

Related Organizations

École Polytechnique
France
Center of Theoretical Physics
France
Centre de Physique Théorique
France
French National Centre for Scientific Research
France

Keywords

Nuclear Theory (nucl-th), High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Nuclear Theory, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], FOS: Physical sciences, 530

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