On minimum-bias effects at the LHC

Abstract

In general, minimum-bias triggers planned for experiments at the LHC miss a considerable fraction of the total number of events. We exemplify the rejection rate using the Durham model of soft high-energy interactions to obtain quantitative estimates of the signals arising from the ATLAS scintillation counters positioned in the rapidity intervals 2<|eta|<4, and also from TOTEM detectors covering the intervals 3.1<|eta|<6.5. Typically we find that the expected signal is about half of the total cross section, sigma(tot). We also calculate the cross section for the so-called zero-bias measurement planned by CMS in the extended rapidity interval -5<eta<7. We emphasize that only models which give satisfactory predictions for the measured minimum-bias or zero-bias cross sections can be used to obtain the value of the total inelastic cross section.

7 pages, 2 figures, 3 tables

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• Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics
• A QCD motivated model for soft interactions at high energies
• Soft processes at the LHC, I: Multi-component model
• Soft diffraction at the LHC: a partonic interpretation
• Double Diffraction Dissociation at the Fermilab Tevatron Collider

Cited by in corpus (4)

• Monte Carlo treatment of hadronic interactions in enhanced Pomeron scheme: I. QGSJET-II model
• Diffraction and correlations at the LHC: definitions and observables
• On the model-dependence of the relation between minimum-bias and inelastic proton-proton cross sections
• Multivariate Techniques for Identifying Diffractive Interactions at the LHC