Diffractive J/psi production as a probe of the gluon component in the Pomeron

Details Diffractive J/psi production as a probe of the gluon component in the Pomeron Diffractive J/psi production as a probe of the gluon component in the Pomeron

1998-01-18

arxiv.org/abs/hep-ph/9801335v1

Phys.Rev. D57 (1998) 5658-5662

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 6 Postscript figures

Scientific paper

10.1103/PhysRevD.57.5658

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.

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