Soft physics at the LHC

Abstract

We recall the main features of the Regge approach used to understand soft interactions at LHC and higher energies. Unitarity tames the power growth of the elastic proton-proton scattering amplitude with energy, and leads to the migration of the secondary particles produced in high-energy proton-proton collisions to larger transverse momenta. We discuss, in qualitative terms, the role of processes containing large rapidity gaps (LRG), and the probability that the gaps survive population by secondaries produced in additional soft interactions. We explain how the Regge diagram corresponding to a LRG event simultaneously describes events with different (single, double, etc.) particle density in the same rapidity interval. We show that the role of these, enhanced, multi-Pomeron diagrams can be studied by measuring multiplicity fluctuations and long-range rapidity correlations between secondaries produced at the Tevatron and the LHC. Finally, we make a list of the characteristic features of the multi-Pomeron description of soft interactions that may be observed at the high energies accessible at the Tevatron and the LHC.

28 pages, 11 figures, Topical Review to be published in J.Phys.G, based on two lectures by Misha Ryskin at the St. Petersburg Winter School, Gatchina, February 2009

References in corpus (18)

• BFKL pomeron in the next-to-leading approximation
• Energy Scale(s) and Next-to-leading BFKL Equation
• A resummation of large sub-leading corrections at small x
• Prospects for New Physics observations in diffractive processes at the LHC and Tevatron
• Renormalization Group Improved Small-x Equation
• Benchmarks for the Forward Observables at RHIC, the Tevatron-run II and the LHC
• Perturbative QCD Approach to Multiparticle Production
• Can the Higgs be seen in rapidity gap events at the Tevatron or the LHC?
• Soft diffraction and the elastic slope at Tevatron and LHC energies: a multi-Pomeron approach
• Hadronic forward scattering: Predictions for the Large Hadron Collider and cosmic rays
• A QCD motivated model for soft interactions at high energies
• Reflective scattering from unitarity saturation
• Soft processes at the LHC, I: Multi-component model
• Forward Physics at the LHC; Elastic Scattering
• The spread of the gluon k_t-distribution and the determination of the saturation scale at hadron colliders in resummed NLL BFKL
• Diffractive dissociation re-visited for predictions at the LHC
• Proceedings of the 38th International Symposium on Multiparticle Dynamics (ISMD08)
• Fundamental problems with hadronic and leptonic interactions

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