Abstract: We study quantum fluctuations of the nucleon's parton densities by combining QCD factorization for hard processes with the notion of cross section fluctuations in soft diffraction. The fluctuations of the small-x gluon density are related to the ratio of inelastic and elastic vector meson production in ep scattering. A simple dynamical model explains the HERA data and predicts the x and Q(2) dependence of the ratio. In pp/(p) over barp scattering, fluctuations enhance multiple hard processes ( but cannot explain the Tevatron CDF data), and reduce gap survival in central exclusive diffraction.
Color fluctuations in the nucleon in high-energy scattering / Frankfurt, L; Strikman, M; Treleani, Daniele; Weiss, C.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 101:(2008), pp. 202003-1-202003-4. [10.1103/PhysRevLett.101.202003]
Color fluctuations in the nucleon in high-energy scattering
TRELEANI, DANIELE;
2008-01-01
Abstract
Abstract: We study quantum fluctuations of the nucleon's parton densities by combining QCD factorization for hard processes with the notion of cross section fluctuations in soft diffraction. The fluctuations of the small-x gluon density are related to the ratio of inelastic and elastic vector meson production in ep scattering. A simple dynamical model explains the HERA data and predicts the x and Q(2) dependence of the ratio. In pp/(p) over barp scattering, fluctuations enhance multiple hard processes ( but cannot explain the Tevatron CDF data), and reduce gap survival in central exclusive diffraction.Pubblicazioni consigliate
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