Evidence for no shrinkage in elastic photoproduction of J/Psi

Abstract

The differential cross section dsigma/dt of elastic photoproduction of J/Psi at different gamma p center of mass energies W are used to determine the properties of the exchanged trajectory in the reaction gamma p --> J/Psi p. In the region |t| < 1 GeV^2, the resulting trajectory is alpha(t) = (1.153 \pm 0.027) + (-0.001 \pm 0.072)t. The vanishing value of the slope of the trajectory is an experimental evidence for no shrinkage and thus for the perturbative nature of the exchange.

arXiv comment7 pages including 2 figures

References in corpus (4)

• Diffractive Hard Scattering with a Coherent Pomeron
• Elastic and Inelastic Photoproduction of \jpsi Mesons at HERA
• Elastic Photoproduction of ${\rho }^0$ Mesons at HERA
• Measurement of Elastic $J/\psi$ Photoproduction at HERA

Cited by in corpus (11)

• Elastic Photoproduction of J/psi and Upsilon Mesons at HERA
• Central Exclusive Particle Production at High Energy Hadron Colliders
• Two-gluon form factor of the nucleon and $J/\psi$ photoproduction
• Determining the Proximity of Γ^{\ast} N Scattering to the Black Body Limit Using DIS and J/ ψProduction
• Near-threshold photoproduction of $J/\psi$ in two-gluon exchange model
• Future Small x Physics with ep and eA Colliders
• Proton-proton interaction in constituent quarks model at LHC energies
• t-dependences of vector meson diffractive production in ep collisions
• Rational form of amplitude and its asymptotic factorization
• QCD - looking forward
• An Investigation of the Hard Contribution to phi Photoproduction