Measurement of the Inelastic Proton-Proton Cross Section at sqrt s =13  TeV with the ATLAS Detector at the LHC.

TitleMeasurement of the Inelastic Proton-Proton Cross Section at sqrt s =13  TeV with the ATLAS Detector at the LHC.
Publication TypeJournal Article
Year of Publication2016
JournalPhysical review letters
Volume117
Issue18
Pagination182002
Date Published2016 Oct 28
ISSN0031-9007
AbstractThis Letter presents a measurement of the inelastic proton-proton cross section using 60  μb^{-1} of pp collisions at a center-of-mass energy sqrt[s] of 13 TeV with the ATLAS detector at the LHC. Inelastic interactions are selected using rings of plastic scintillators in the forward region (2.07<|η|<3.86) of the detector. A cross section of 68.1±1.4  mb is measured in the fiducial region ξ=M_{X}^{2}/s>10^{-6}, where M_{X} is the larger invariant mass of the two hadronic systems separated by the largest rapidity gap in the event. In this ξ range the scintillators are highly efficient. For diffractive events this corresponds to cases where at least one proton dissociates to a system with M_{X}>13  GeV. The measured cross section is compared with a range of theoretical predictions. When extrapolated to the full phase space, a cross section of 78.1±2.9  mb is measured, consistent with the inelastic cross section increasing with center-of-mass energy.
URLhttp://link.aps.org/abstract/PRL/v117/p182002
DOI10.1103/PhysRevLett.117.182002
PubMed Linkhttp://www.ncbi.nlm.nih.gov/pubmed/27834993?dopt=Abstract
Short TitlePhys Rev Lett