Measurement of the inelastic $pp$ cross-section at a centre-of-mass energy of $\sqrt{s}=7$ TeV

Abstract

The cross-section for inelastic proton-proton collisions, with at least one prompt long-lived charged particle of transverse momentum $p_{\mathrm{T}}>0.2$ GeV/$c$ in the pseudorapidity range $2.0<\eta <4.5$, is measured by the LHCb experiment at a centre-of-mass energy of $\sqrt{s}=7$ TeV. The cross-section in this kinematic range is determined to be ${\sigma }_{\mathrm{inel}}^{\mathrm{acc}}=55.0\pm 2.4$ mb within the spectrometer acceptance with an experimental uncertainty that is dominated by systematic contributions. Extrapolation to the full phase space, using PYTHIA 6, yields ${\sigma }_{\mathrm{inel}}=66.9\pm 2.9\pm 4.4$ mb, where the first uncertainty is experimental and the second is due to the extrapolation.

15 pages, 2 figures

References in corpus (7)

• PYTHIA 6.4 Physics and Manual
• An Introduction to PYTHIA 8.2
• Big-Bang Nucleosynthesis
• Performance of the LHCb Vertex Locator
• Measurement of the total cross section from elastic scattering in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Measurement of the inelastic proton-proton cross section at sqrt(s) = 7 TeV
• The Froissart bound for inelastic cross-sections

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• Forming Molecular States with Hadronic Rescattering
• Inelastic cross-section and Survival Probabilities at LHC in mini-jet models
• The proton inelastic cross section at ultrahigh energies