Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-12-16
Acta Physica Polonica B vol. 42 (2011) page 2607
Physics
High Energy Physics
High Energy Physics - Phenomenology
21 page, 10 figures, to be published in proceedings of the LI Cracow School of Theoretical Physics "Soft side of the LHC", Zak
Scientific paper
10.5506/APhysPolB.42.2607
The transverse structure of the nucleon as probed in hard exclusive processes plays critical role in the understanding of the structure of the underlying event in hard collisions at the LHC, and multiparton interactions. We summarize results of our recent studies of manifestation of transverse nucleon structure in the hard collisions at the LHC, new generalized parton distributions involved in multiparton interactions, presence of parton fluctuations. The kinematic range where interaction of fast partons of the projectile with the target reach black disk regime (BDR) strength is estimated. We demonstrate that in the BDR postselection effect leads to effective fractional energy losses. This effect explains regularities of the single and double forward pion production in $ dAu$ collisions at RHIC and impacts on the forward physics in $pp$ collisions at the LHC.
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