Decisive test of color transparency in exclusive electroproduction of vector mesons
Nov, 1993
16 pages
Published in:
- Phys.Lett.B 324 (1994) 469-476
e-Print:
- hep-ph/9311237 [hep-ph]
Report number:
- KFA-IKP-TH-1993-27,
- KFA-IKP-TH-1993-29
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Abstract: (Elsevier)
The exclusive production of vector mesons in deep inelastic scattering is a hard scattering process with the well controlled size of quark configurations which dominate the production amplitude. This allows an unambiguous prediction of colour transparency effects in the coherent and incoherent production of vector mesons on nuclei. We demonstrate how the very mechanism of colour transparency leads to a belated onset of colour transparency effects as a function of Q 2 . We conclude that the Q 2 dependence of the exclusive ϱ 0 -meson production on nuclei and nucleons observed in the Fermilab E665 experiment gives a solid evidence for the onset of colour transparency. We propose the scaling relation between the ϱ 0 and the J / Ψ production, which further tests the mechanism of colour transparency in exclusive (virtual) photoproduction.Note:
- 11 pages, 4 figures on the request from kph154@zam001.zam.kfa-juelich.de, Juelich preprint KFA-IKP(Th)-1993-27. \phantom{.}\hspace{9cm}{\sl 8 November 1993}
- lepton nucleus: deep inelastic scattering
- deep inelastic scattering: lepton nucleus
- photon p: interaction
- interaction: photon p
- vector meson: photoproduction
- photoproduction: vector meson
- color: transparency
- hard scattering
- momentum transfer dependence
- rho(770)
References(20)
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