2016/06/30 by ATLAS Collaboration · 2 citations
Physics and Astronomy · #hep-ex
paper · pdf · doi:10.1103/physrevlett.117.182002
published as Phys. Rev. Lett. 117, 182002 (2016) · 12 pages plus author list + cover pages (30 pages total), 3 figures, 1 table. Revised version including an update of Figure 3. Published in Phys. Rev. Lett.. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2015-05
arxiv created 2016/11/04 · arxiv updated 2016/11/10
This Letter presents a measurement of the inelastic proton-proton cross section using 60 μb-1 of pp collisions at a center-of-mass energy √(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=MX2/s>10-6, where MX 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 MX>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.