Measurement of the inelastic proton-proton cross-section at √s = 7 TeV with the ATLAS detector

The ATLAS collaboration

Research output: Contribution to journalArticle

108 Citations (Scopus)

Abstract

The dependence of the rate of proton-proton interactions on the centre-of-mass collision energy, √s, is of fundamental importance for both hadron collider physics and particle astrophysics. The dependence cannot yet be calculated from first principles; therefore, experimental measurements are needed. Here we present the first measurement of the inelastic proton-proton interaction cross-section at a centre-of-mass energy, √s, of 7 TeV using the ATLAs detector at the Large Hadron Collider. 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 ξ> 5×10-6, where ξ is calculated from the invariant mass, Mx, 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.

Original languageEnglish
Article number463
JournalNature communications
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 1 2011

Fingerprint

Protons
Detectors
protons
detectors
Colliding beam accelerators
cross sections
center of mass
Hadrons
Scintillation Counting
Astrophysics
Scintillation counters
Physics
hadrons
scintillation counters
astrophysics
interactions
dissociation
physics
collisions
energy

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Measurement of the inelastic proton-proton cross-section at √s = 7 TeV with the ATLAS detector. / The ATLAS collaboration.

In: Nature communications, Vol. 2, No. 1, 463, 01.01.2011.

Research output: Contribution to journalArticle

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