ATLAS measurements of minimum bias and soft QCD

Journal Article · Wed Dec 22 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3536581· OSTI ID:21510050

Limper, Maaike ^[1]

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1. University of Iowa, 203 Van Allen Hall, Iowa City (United States)

The first measurements of charged particle production in proton-proton collisions at center-of-mass energy {radical}(s) = 900 GeV and 7 TeV recorded with the ATLAS detector at the LHC are presented. Minimum bias distributions are measured for events with at least one charged particle in the kinematic range |{eta}| <2.5 and p{sub T}>500 MeV and compared with the predictions from various Monte Carlo models. Activity in the underlying event was measured with respect to the highest p{sub T} track in the event. Both the minimum bias and underlying event measurements are fully corrected for detector effects to obtain distributions at the hadron level.A new PYTHIA6 Monte Carlo tune, ATLAS Minimum Bias Tune 1, was produced using ATLAS minimum bias distributions measured in a diffractive limited phase-space in combination with measurements from previous hadron collider experiments. The new tune is shown to significantly improve the predictions for minimum bias distributions measured in the diffractive limited phase-space.

• OSTI ID: 21510050
• Journal Information: AIP Conference Proceedings, Vol. 1317, Issue 1; Conference: International workshop on quantum chromodynamics: Theory and experiment - Beppe Nardulli memorial workshop, Martina Franca (Italy), 20-23 Jun 2010; Other Information: DOI: 10.1063/1.3536581; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CENTER-OF-MASS SYSTEM
CERN LHC
CHARGED PARTICLES
DISTRIBUTION
FORECASTING
GEV RANGE 100-1000
HADRONIC ATOMS
HADRONS
MONTE CARLO METHOD
PARTICLE PRODUCTION
PARTICLE TRACKS
PHASE SPACE
PHOSPHORS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
TEV RANGE 01-10
ACCELERATORS
ATOMS
BARYON-BARYON INTERACTIONS
CALCULATION METHODS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
GEV RANGE
HADRON-HADRON INTERACTIONS
INTERACTIONS
MATHEMATICAL SPACE
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PROTON-NUCLEON INTERACTIONS
QUANTUM FIELD THEORY
SPACE
STORAGE RINGS
SYNCHROTRONS
TEV RANGE