1 research outputs found
Diffractive J/psi production as a probe of the gluon component in the Pomeron
Presented here is a study of the large p_T J/psi production in hard
diffractive process by the pomeron exchange at the Fermilab Tevatron. We find
that this process (p\bar p \to p+J/psi+X) can be used to probe the gluon
content of the pomeron and to measure the gluon fraction of the pomeron. And
the diffractive direct J/psi production can also provide another crucial test
for the color-octet fragmentation mechanism. Using the renormalised pomeron
flux factor D\approx 1/9, the single diffractive J/psi production cross section
at large p_T (\geq 8GeV) is found to be of order of 0.01 nb, and the ratio of
the single diffractive to the non-diffractive J/psi production is 0.65\pm 0.15%
for the gluon fraction f_g=0.7\pm 0.2.Comment: 13 pages, 6 Postscript figure