Evidence for no shrinkage in elastic photoproduction of J/Psi

Preprint

24 December 1997

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/9712519

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.

Keywords

PHOTOPRODUCTION OF J/PSI
ELASTIC PHOTOPRODUCTION
DIFFERENTIAL CROSS
NO SHRINKAGE
TRAJECTORY
SHRINKAGE

All Related Versions

Version 1, 1997-12-24, ArXiv
Published version: Physics Letters B, 424 (1-2), 191.

This publication has 0 references indexed in Scilit: