Soft data and the hard pomeron
نویسندگان
چکیده
منابع مشابه
Pomeron flux renormalization in soft and hard diffraction
While the main features of elastic, diffractive and total cross sections are described well by Regge theory, the measured rise of the proton-(anti)proton single diffraction dissociation cross section with energy is considerably smaller than the theoretical prediction based on factorization and a constant triplepomeron coupling. The observed energy dependence is obtained by renormalizing the pom...
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We show that it is possible to describe the effective Pomeron intercept, determined from the HERA deep inelastic scattering data at small values of Bjorken x, by using next-to-leading order Balitsky-Fadin-Kuraev-Lipatov evolution together with collinear improvements. To obtain a good description over the whole range of Q(2), we use a non-Abelian physical renormalization scheme with the Brodsky-...
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It is demonstrated that the " soft pomeron " (together with a secondary reggeon) describing cross-sections of hadron-hadron collisions is fairly able to describe the energy dependence of cross-sections of exclusive (virtual) photoproduction of vector mesons (ρ 0 , ϕ, J/ψ) obtained at HERA. However these poles are insufficient for description of the total DIS cross-section. The effect of acceler...
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The inclusive production of several jets is studied in the framework of the hard pomeron model. The average jet momenta are found to be strongly ordered and growing towards the central c.m. rapidity, as expected. Strong positive correlations are found for pairs of jets neighbouring in rapidity, both in the forward-backward and forwardforward directions. ∗Permanent address: Dep. High-Energy Phys...
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It is shown that direct photons provide a leading twist mechanism for diffractive jet production in which the jets carry away all of the momentum lost by the proton. Two-photon processes are thus expected to asymptotically dominate “super-hard” pomeron events in ep collisions. We report the expected rates from these events for recent ZEUS and H1 data cuts. We also estimate the direct photon con...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2006
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2005.08.015