Speaker
Adrian Dumitru
(Baruch College, CUNY)
Description
Exclusive C = +1 quarkonium production in high-energy electron-proton
scattering requires a C-odd t-channel exchange of a photon or three
gluons, i.e. the perturbative Odderon. The relative phase of the amplitudes
is determined by the sign of the light-front matrix element of the
eikonal color current operator $d^{abc} J^{+a} J^{+b} J^{+c}$. This is
non-vanishing only in the presence of non-Gaussian color charge
fluctuations in the proton. Model calculations predict constructive
interference of photon and three gluon exchanges and that the Odderon
dominates beyond momentum transfer $|t| ∼ 1$ GeV$^2$. Numerical predictions
for the cross sections for exclusive production of scalar, axial-vector and
tensor Chi_{c} states will be presented.
Primary author
Adrian Dumitru
(Baruch College, CUNY)
