Probes of multiparticle production at the LHC

Ryskin, M.G.; Martin, A.D.; Khoze, V.A.

Abstract

We discuss how the main features of high-energy 'soft' and 'semihard' pp collisions may be described in terms of parton cascades and multi-pomeron exchange. The interaction between pomerons produces an effective infrared cutoff, ksat, by the absorption of low kt partons. This provides the possibility of extending the parton approach, used for 'hard' processes, to also describe high-energy soft and semihard interactions. In particular, the presence of the cutoff ksat, which increases with collider energy, means that the production and hadronization of minijets with pt gsim ksat are the main source of the soft secondaries. We propose several measurements which can be made at the LHC that can further illuminate our understanding of the mechanism which drives the soft and semihard interactions. We show that the structure of pomeron–pomeron interactions may be studied in double-pomeron-exchange processes and in the pt distributions of secondaries near the edge of large rapidity gaps. The so-called ridge effect is another manifestation of the interaction of two partonic cascades.

Citation

Ryskin, M., Martin, A., & Khoze, V. (2011). Probes of multiparticle production at the LHC. Journal of Physics G: Nuclear and Particle Physics, 38(8), Article 085006. https://doi.org/10.1088/0954-3899/38/8/085006

• Journal Article Type: Article
• Online Publication Date: Jul 6, 2011
• Publication Date: 2011
• Deposit Date: Jan 23, 2012
• Journal: Journal of Physics G: Nuclear and Particle Physics
• Print ISSN: 0954-3899
• Electronic ISSN: 1361-6471
• Publisher: IOP Publishing
• Peer Reviewed: Peer Reviewed
• Volume: 38
• Issue: 8
• Article Number: 085006
• DOI: https://doi.org/10.1088/0954-3899/38/8/085006