Measurement of the Inelastic Proton-Proton Cross-Section at s=7\sqrt{s}=7 TeV with the ATLAS Detector

Collaboration
Apr, 2011
6 pages
Published in:
  • Nature Commun. 2 (2011) 463
e-Print:
Report number:
  • CERN-PH-EP-2011-047
Experiments:

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Abstract: (arXiv)
A first measurement of the inelastic cross-section is presented for proton-proton collisions at a center of mass energy sqrt{s}=7 TeV using the ATLAS detector at the Large Hadron Collider. In a dataset corresponding to an integrated luminosity of 20 mub-1, events are selected by requiring hits on scintillation counters mounted in the forward region of the detector. An inelastic cross-section of $60.3 +/- 2.1 mb is measured for xi > 5x10^-6, where xi=M_X^2/s is calculated from the invariant mass, M_X, of hadrons selected using the largest rapidity gap in the event. For diffractive events this corresponds to requiring at least one of the dissociation masses to be larger than 15.7 GeV.
Note:
  • 6 pages plus author list (19 pages total). 4 figures, 2 tables, submitted to Nature Communications
  • 13.85.Hd
  • 12.40.Nn
  • 13.85.Lg
  • rapidity: gap
  • cross section: inelastic scattering: measured
  • ATLAS
  • scintillation counter: trigger
  • CERN LHC Coll
  • p p: inelastic scattering
  • diffraction