TY - JOUR
T1 - Perturbative QCD calculation of real and virtual Compton scattering
AU - Farrar, Glennys R.
AU - Zhang, Huayi
PY - 1990
Y1 - 1990
N2 - We present the predictions of perturbative QCD for Compton scattering as a function of photon virtuality. Individual helicity amplitudes are given, along with formulas to permit calculation of the eNeN amplitudes. We discover remarkable structure in some of the amplitudes as a function of photon virtuality. Since eNeN contains a contribution from Bethe-Heitler scattering, whose magnitude and phase are known, the phases of the virtual Compton amplitudes can in principle be measured by interference with it. It has been shown that the leading-twist behavior of high-energy, large-angle Compton scattering is not affected by soft physics; thus at sufficiently high energies these predictions provide a stringent test of QCD.
AB - We present the predictions of perturbative QCD for Compton scattering as a function of photon virtuality. Individual helicity amplitudes are given, along with formulas to permit calculation of the eNeN amplitudes. We discover remarkable structure in some of the amplitudes as a function of photon virtuality. Since eNeN contains a contribution from Bethe-Heitler scattering, whose magnitude and phase are known, the phases of the virtual Compton amplitudes can in principle be measured by interference with it. It has been shown that the leading-twist behavior of high-energy, large-angle Compton scattering is not affected by soft physics; thus at sufficiently high energies these predictions provide a stringent test of QCD.
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U2 - 10.1103/PhysRevD.41.3348
DO - 10.1103/PhysRevD.41.3348
M3 - Article
AN - SCOPUS:26144433086
SN - 1550-7998
VL - 41
SP - 3348
EP - 3359
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
IS - 11
ER -