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Handling the Handbag Diagram in Compton Scattering on the Proton | | Gerald A. Miller
; | | Date: |
26 Feb 2004 | | Journal: | Phys.Rev. C69 (2004) 052201 | | Subject: | nucl-th hep-ph nucl-ex | | Abstract: | Poincare invariance, gauge invariance, conservation of parity and time reversal invariance are respected in an impulse approximation evaluation of the handbag diagram. Proton wave functions, previously constrained by comparison with measured form factors, that incorporate the influence of quark transverse and orbital angular momentum (and the corresponding violation of proton helicity conservation) are used. Computed cross sections are found to be in reasonably good agreement with early measurements. The helicity correlation between the incident photon and outgoing proton, $K_{LL}$, is both large and positive at back angles. For photon laboratory energies of $le$ 6 GeV, we find that $K_{LL}
e A_{LL}$, $D_{LL}
e1$, and that the polarization $P$ can be large. | | Source: | arXiv, nucl-th/0402092 | | Services: | Forum | Review | PDF | Favorites | |
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