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. The relative phase of the amplitudes is determined by the sign
of the light-front matrix element of the eikonal color current
operator $d^{abc} J^{+a} J^{+b} J^{+c}$. Model calculations predict
constructive interference, which is particularly strong for momentum
transfer $|t| \sim 1$ GeV$^2$ where the cross section for $\chi_{cJ}$ production
exceeds that for pure photon exchange by up to a factor of 4.
Author
Adrian Dumitru
(Baruch College (CUNY))
Co-authors
Abhiram Kaushik
(University of Zagreb)
Leszek Motyka
(Jagiellonian University, Krakow)
Sanjin Benic
(University of Zagreb)
Tomasz Stebel
(Jagiellonian University, Krakow)
