Heavy quarks and the measured surplus in the high-energy total photoproduction cross section

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Abstract

A recent experiment at Fermilab with tagged photon beam has extended the total-cross-section measurements σT(γp) to Eγ=180 GeV. In an earlier work, we have applied the core-valence quark model, using light quarks only, together with vector-meson dominance to describe σT(γp) up to 10 GeV. We have now extended our model by including the heavy-quark contribution, and in spite of this addition we find a definiency of 2-5 μb in σT(γp) in the high-energy region. Calculations within the framework of other models fail to account for the surplus in the experimental data. On extending the model to electroproduction we again encounter normalization difficulties.

Original languageEnglish
Pages (from-to)1607-1612
Number of pages6
JournalPhysical review D
Volume19
Issue number5
DOIs
StatePublished - 1979

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