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

Aad, G. and Mateos, D. Lopez and Marshall, Z. and Perez, K. (2011) Measurement of the inelastic proton–proton cross-section at √s = 7 TeV with the ATLAS detector. Nature Communications, 2 . Art. No. 463. ISSN 2041-1723. PMCID PMC3220302. https://resolver.caltech.edu/CaltechAUTHORS:20111005-072317196

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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, 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1038/ncomms1472DOIArticle
http://www.ncbi.nlm.nih.gov/pmc/articles/pmc3220302/PubMed CentralArticle
Additional Information:© 2011 Macmillan Publishers Limited. Received 05 April 2011. Accepted 04 August 2011. Published 06 September 2011. Updated online 29 September 2011. We thank CERN for the efficient commissioning and operation of the LHC during this initial high-energy data-taking period as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We also thank T. Sjöstrand, M. Ryskin and V. Khoze for their help on the theoretical aspects of the analysis. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; ARTEMIS, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNAS, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; and DOE and NSF, United States of America. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN and the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA) and in the Tier-2 facilities worldwide. Author contributions: All authors have contributed to the publication, being variously involved in designing and building the detector, writing offline software, operating and calibrating the detector and analysing the analysis of the processed data.
Funders:
Funding AgencyGrant Number
ANPCyT (Argentina)UNSPECIFIED
YerPhl (Armenia)UNSPECIFIED
Australian Research CouncilUNSPECIFIED
BMWF (Austria)UNSPECIFIED
ANAS (Azerbaijan)UNSPECIFIED
SSTC (Belarus)UNSPECIFIED
CNPq and FAPESP (Brazil)UNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
NRC and CFI (Canada)UNSPECIFIED
CERNUNSPECIFIED
CONICYT (Chile)UNSPECIFIED
Chinese Academy of SciencesUNSPECIFIED
MOST and NSFC (China)UNSPECIFIED
COLCIENCIAS (Colombia)UNSPECIFIED
MSMT CR (Czech Republic)UNSPECIFIED
MPO CR and VSC CR (Czech Republic)UNSPECIFIED
Danish National Research FoundationUNSPECIFIED
DNSRC and Lundbeck Foundation (Denmark)UNSPECIFIED
ARTEMISUNSPECIFIED
European UnionUNSPECIFIED
IN2P3-CNRS (France)UNSPECIFIED
CEA-DSM/IRFU (France)UNSPECIFIED
GNAS (Georgia)UNSPECIFIED
BMBF (Germany)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)UNSPECIFIED
MPG and AvH Foundation (Germany)UNSPECIFIED
GSRT (Greece)UNSPECIFIED
ISF (Israel)UNSPECIFIED
MINERVA (Israel)UNSPECIFIED
German-Israeli Foundation for Research and DevelopmentUNSPECIFIED
DIP and Benoziyo Center (Israel)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
MEXT and JSPS (Japan)UNSPECIFIED
CNRST (Morocco)UNSPECIFIED
FOM and NWO (The Netherlands)UNSPECIFIED
Research Council of NorwayUNSPECIFIED
MNiSW (Poland)UNSPECIFIED
GRICES and FCT (Portugal)UNSPECIFIED
MERYS (MECTS) (Romania)UNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
ROSATOM (Russian Federation)UNSPECIFIED
JINRUNSPECIFIED
MSTD (Serbia)UNSPECIFIED
MSSR (Slovakia)UNSPECIFIED
ARRS and MVZT (Slovenia)UNSPECIFIED
DST/NRF (South Africa)UNSPECIFIED
MICINN (Spain)UNSPECIFIED
SRC and Wallenberg Foundation (Sweden)UNSPECIFIED
SER (Switzerland)UNSPECIFIED
SNSF and Cantons of Bern in Geneva (Switzerland)UNSPECIFIED
National Science Council (Taipei)UNSPECIFIED
TAEK (Turkey)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Royal SocietyUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Leverhulme TrustUNSPECIFIED
Subject Keywords:Physical Sciences; Particle physics
PubMed Central ID:PMC3220302
Record Number:CaltechAUTHORS:20111005-072317196
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20111005-072317196
Official Citation:Measurement of the inelastic proton–proton cross-section at √s=7 TeV with the ATLAS detector open Nature Communications 2, 463 doi:10.1038/ncomms1472
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:26583
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:05 Oct 2011 15:09
Last Modified:06 Jul 2020 21:18

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