Two Photon Distribution Amplitudes

Journal Article · Fri Aug 29 00:00:00 EDT 2008 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2987183· OSTI ID:21152403

El Beiyad, M ^[1]; Pire, B ^[1]; Szymanowski, L ^[2]; Wallon, S ^[3]

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1. Centre de Physique Theorique, Ecole Polytechnique, CNRS, 91128 Palaiseau (France)
2. Soltan Institute for Nuclear Studies, Warsaw (Poland)
3. LPT, Universite d'Orsay, CNRS, 91404 Orsay (France)

The factorization of the amplitude of the process {gamma}*{gamma}{yields}{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 Q{sup 2} behaviour and obey new inhomogeneous evolution equations.

• OSTI ID: 21152403
• Journal Information: AIP Conference Proceedings, Vol. 1038, Issue 1; Conference: HLPW 2008: Joint meeting Heidelberg-Liege-Paris-Wroclaw on hadronic physics, Spa (Belgium), 6-8 Mar 2008; Other Information: DOI: 10.1063/1.2987183; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
COMPTON EFFECT
FACTORIZATION
FOUR MOMENTUM TRANSFER
PHOTON-PHOTON INTERACTIONS
PHOTONS
QUANTUM CHROMODYNAMICS
QUARK MATTER
SCATTERING AMPLITUDES
SYMMETRY BREAKING