Photoproduction of Mesons in Nuclei at Gev Energies *
نویسندگان
چکیده
In a transport model that combines initial state interactions of the photon with final state interactions of the produced particles we present a calculation of inclusive photoproduction of mesons in nuclei in the energy range from 1 to 7 GeV. We give predictions for the photoproduction cross sections of pions, etas, kaons, antikaons, and π + π − invariant mass spectra in 12 C and 208 Pb. The effects of nuclear shadowing and final state interaction of the produced particles are discussed in detail.
منابع مشابه
FORWARD PHOTOPRODUCTION OF VECTOR MESONS FROM HYDROGEN AT ENERGIES FROM 6.5 GeV TO 17.8 GeV*
We report measurements of the differential cross sections of P” and $ meson photoproduction on hydrogen for a range of fourmomentum transfer squared, t , from -0. 2(GeV/c)2 to -0. 9(GeV/c)2 and a range of incident photon energies from 6.5 GeV to 17.8 GeV. We find that differential cross sections obtained for p” production are in good agreement with the vector dominance model. * Work supported b...
متن کاملCoherence Effects in Diffractive Electroproduction from Nuclei
We argue that study of the cross section of coherent photo(electro) production of ρ, ρ, ...-mesons provides an effective method to probe onset of black body limit(BBL) in the soft and hard QCD interactions. We illustrate the expected features of the onset of BBL using generalized vector dominance model(GVDM). We show that this model describes very well ρ-meson coherent photoproduction at 6 ≤ Eγ...
متن کاملar X iv : h ep - p h / 02 07 27 2 v 1 2 3 Ju l 2 00 2 Photoproduction of vector mesons in the Soft Dipole Pomeron model
Exclusive photoproduction of all vector mesons by real and virtual photons is considered in the Soft Dipole Pomeron model. It is emphasized that being the Pomeron in this model a double Regge pole with intercept equal to one, we are led to rising cross-sections but the unitarity bounds are not violated. It is shown that all available data for ρ, ω, ϕ, J/ψ and Υ in the region of energies 1.7 ≤ W...
متن کاملRegge pole model for all vector meson exclusive photoproduction by real and virtual photons
A model based on a dipole Pomeron framework for vector meson exclusive photoproduction by real and virtual photons shows very good agreement with the experimental data. The model does not violate unitarity constrains and describes in a universal manner all the available data for ρ, ω, ϕ, J/ψ and Υ vector meson photoproduction in the region of energies 1.7 ≤ W ≤ 250 GeV and photon virtualities 0...
متن کاملIn-medium Properties of Hadrons – Observables
We first briefly review the theoretical basis for calculations of changes of hadronic properties in dense nuclear matter. These changes have usually been investigated by means of relativistic heavy-ion reactions. Here we discuss that observable consequences of such changes can also be seen in more elementary reactions on nuclei. Particular emphasis is put on a discussion of actual observables i...
متن کامل