We study a novel property of large rapidity-gap events in deep inelastic scattering at HERA: splitting the pomeron into two jets in the photon-pomeron fusion reaction γ ∗IP → q overlineq. It gives rise to the diffraction dissociation of virtual photons into the back-to-back jets. We find that at large invariant mass M of two jets, M2 ≫ Q2, the transverse momentum of jets comes from the intrinsic transverse momentum of gluons in the pomeron, and the photon-pomeron fusion direcly probes the differential gluon structure function of the proton ∂G( x, q2)/ ∂ log q2 at the virtuality q2 ∼ k2. We present estimates for the jet production cross section, which show the process is easily measurable at HERA.
Physics Letters B
- Pub Date:
- July 1994
- High Energy Physics - Phenomenology
- 11 pages, 4 figures on request from firstname.lastname@example.org, Juelich preprint KFA-IKP(Th)-1994-16, 10 March 1994