Exclusive photoproduction of
نویسندگان
چکیده
منابع مشابه
Exclusive Photoproduction at HERA
The exclusive Υ photoproduction, γ p → Υp, has been studied with the ZEUS experiment in ep collisions at HERA using an integrated luminosity of 468 pb−1. The measurement covers the kinematic range 60 < W < 220 GeV and Q2 < 1 GeV2, where W is the photon-proton centre-ofmass energy and Q2 is the photon virtuality. These results, which represent the analysis of the full ZEUS data sample for this c...
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Exclusive photoproduction of dileptons, γp → `+`− p, will be measured in ultraperipheral collisions at LHC. The mechanism where the lepton pair comes from a heavy timelike photon radiated from a quark interferes with the pure QED process γγ → `+`−. As an analog of deeply virtual Compton scattering, this timelike Compton scattering is a way to study generalized parton distributions in the nucleo...
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It is shown that instantons can provide an explanation of the strong polarization transfer observed in exclusive hyperon photoproduction at JLab. Pacs: 13.60.-r, 13.60.Rj, 13.88.+e, 12.38.-t,
متن کاملExclusive J/ψ photoproduction and gluon polarization
In exclusive J/ψ production by polarized photons incident on polarized protons , a finite polarization asymmetry arises because of c¯ c Fermi-motion and binding-energy effects. The asymmetry depends on the polarized nonfor-ward gluon distribution of the proton and thus gives information on gluon polarization in the proton. The analyzing power, however, is rather small. Gluon polarization in the...
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ژورنال
عنوان ژورنال: The European Physical Journal C
سال: 1999
ISSN: 1434-6044
DOI: 10.1007/s100520050664