Beam normal spin asymmetry in the quasireal Compton scattering approximation
Journal Article
·
· Physical Review. C, Nuclear Physics
- Genoa University, Department of Physics, I-16146 Genoa, Italy and California Institute of Technology, Pasadena, California 91125 (United States)
The two-photon exchange contribution to the single spin asymmetries with the spin orientation normal to the reaction plane is discussed for elastic electron-proton scattering in the equivalent photon approximation. In this case, the hadronic part of the two-photon exchange amplitude describes real Compton scattering (RCS). We show that in the case of the beam normal spin asymmetry this approximation selects only the photon helicity flip amplitudes of RCS. At low energies, we make use of unitarity and estimate the contribution of the {pi}N multipoles to the photon helicity flip amplitudes. In the Regge regime, the quasi-RCS (QRCS) approximation allows for a contribution from two-pion exchange, and we provide an estimate of such contributions.
- OSTI ID:
- 20771553
- Journal Information:
- Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 73; ISSN 0556-2813; ISSN PRVCAN
- Country of Publication:
- United States
- Language:
- English
Similar Records
Normal Spin Asymmetries in Elastic Electron-Proton Scattering
Beam normal spin asymmetry in elastic lepton-nucleon scattering
Transverse single spin asymmetry in elastic electron-proton scattering
Conference
·
Fri Oct 01 00:00:00 EDT 2004
·
OSTI ID:842294
Beam normal spin asymmetry in elastic lepton-nucleon scattering
Journal Article
·
Wed Mar 31 23:00:00 EST 2004
· Nuclear Physics. A
·
OSTI ID:824717
Transverse single spin asymmetry in elastic electron-proton scattering
Conference
·
Mon Jan 31 23:00:00 EST 2005
·
OSTI ID:839020