Real and virtual Compton scattering in a Regge approach - INSPIRE

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Real and virtual Compton scattering in a Regge approach

F. Cano
(
- Saclay and
- DAPNIA, Saclay
)
,
J.M. Laget
(
- Saclay and
- DAPNIA, Saclay
)

Sep, 2002

12 pages

Published in:

Phys.Lett.B 551 (2003) 317-323,
Phys.Lett.B 571 (2003) 260-260 (erratum)

e-Print:

hep-ph/0209362 [hep-ph]

DOI:

10.1016/S0370-2693(02)03075-7,
10.1016/j.physletb.2003.08.016 (erratum)

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Abstract:

We study Real and Deeply Virtual Compton Scattering in a model based on Regge trajectories and two-gluon exchange. In the kinematic regime of current experiments, the hadronic component of the outgoing real photon plays a major role. We analyze the spin structure of Compton scattering at large momentum transfer and give predictions for several spin asymmetries. In the DVCS channel, a fairly good agreement is obtained for the recently measured beam spin and charge asymmetries.

Note:

12 pages: 6 figures This revised version corrects a mumerical mistake in the evaluation of the conversion factor between vector mesons and Compton amplitudes. Also, more details are given on the parameters of the sigma meson amplitude Journal-ref: Phys.Lett. B551 (2003) 317-323

photon p: Compton scattering
Compton scattering: on-shell
Compton scattering: off-shell
Regge poles
exchange: two-gluon
photon: polarization
p: polarization
spin: asymmetry
angular dependence
rho(770)0: photoproduction

References(28)

Figures(0)

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