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Measurement of the inelastic proton-proton cross-section at root s=7 TeV with the ATLAS detector
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
University of Chicago.ORCID iD: 0000-0002-8913-0981
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Number of Authors: 3052
2011 (English)In: Nature Communications, ISSN 2041-1723, Vol. 2, 463- p.Article in journal (Refereed) Published
Abstract [en]

The dependence of the rate of proton-proton interactions on the centre-of-mass collision energy, root 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, root 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 crosssection of 60.3 +/- 2.1 mb is measured for xi > 5x10(-6), where xi 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.

Place, publisher, year, edition, pages
2011. Vol. 2, 463- p.
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-41816DOI: 10.1038/ncomms1472ISI: 000294807200005OAI: diva2:445208
QC 20111003. Author count: 3052.Available from: 2011-10-03 Created: 2011-10-03 Last updated: 2012-02-14Bibliographically approved

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Grahn, Karl-JohanLund-Jensen, BengtStrandberg, JonasLafaye, Remi
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