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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Particle PT Density versus Lead Particle PT at centre-of-mass energy 7000 GeV.
Standard deviation of the Particle Number Density versus Lead Particle PT at centre-of-mass energy 900 GeV.
Standard deviation of the Particle Number Density versus Lead Particle PT at centre-of-mass energy 7000 GeV.
Standard deviation of the Particle PT Density versus Lead Particle PT at centre-of-mass energy 900 GeV.
Standard deviation of the Particle PT Density versus Lead Particle PT at centre-of-mass energy 7000 GeV.
Mean Particle PT versus Lead Particle PT at centre-of-mass energy 900 GeV.
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CERN-LHC. Measurement of the cross section for inclusive production of isolated prompt photons in proton-proton collisions at a centre-of-mass energy of 7 TeV. The measurement covers the |pseudorapidity| ranges < 1.37 and 1.52 to 1.81 for photons of transverse energy from 15 to 100 GeV from a data sample of total integrated luminosity of 880 nb-1. The isolation criteria is based on the energy in a cone (R=0.4) in pseudorapidity-azimuthal angle space around the photon direction.
The measured prompt photon cross section as a function of transverse energy for the |pseudorapidity| range < 0.6.
The measured prompt photon cross section as a function of transverse energy for the |pseudorapidity| range 0.6 to 1.37.
The measured prompt photon cross section as a function of transverse energy for the |pseudorapidity| range 1.52 to 1.81.
CERN-LHC. Study of events having final states with no leptons, jets and missing transverse momentum, and with no reconstructed electrons or muons, in proton-proton collisions at a centre-of-mass energy of 7 TeV. Data are selected with various cuts and criteria to enhance different physics regions as described in the text of the paper. Exclusion limits on gluino and squark masses in SUSY models are presented for a simplified model (described in the paper) together with limits on m_0 and m_1/2 in MSUGRA/CMSSM models. The data sample has a total integrated luminosity of 35 pb-1 and shows no excess above the Standard Model background.
CERN-LHC. Measurements of Z/GAMMA* transverse momentum distributions in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data, covering transverse momenta up to 350 GeV and di-lepton masses from 66 to 116 GeV, are presented separately for E+ E- and MU+ MU- final states with respective total integrated luminosities of 35 pb-1 and 40 pb-1. Data are given for three different treatments of QED final state radiation (propagator, dressed and bare). The combined data sets are then presented both as fiducial cross sections and acceptance corrected cross sections.
CERN-LHC. Measurement of the properties of charged particle jets produced in proton-proton collisions at a centre-of-mass energy of 7 TeV using a minimum-bias trigger. The data were taken during 2010 and have an integrated luminosity of 779 mub^{-1}. Jets are reconstructed using the anti-kT algorithm with radius parameters 0.4 and 0.6 applied to charged particles with PT > 300 MeV. The measured track-based jets are corrected back to truth-level charged particle jets, which are defined to be the jets obtained when the same algoerithm is applied to all primary charged particles with the same PT cut. Measurements of the PT cross sections, multiplicities per jet, fragmentation Z distributions, transverse momentum and charged particle radial densities relative to the jet axes are presented in slices of rapidity and transverse momentum.
CERN-LHC. Search for SUSY in final states containing one isolated lepton (electron or muon), jets and missing transverse momentum in proton-proton collisions at a centre-of-mass energy of 7 TeV. The data sample, collected during 2010, has a total integrated luminosity of 35 pb-1. No excess above the standard model is found. This record contains the distributions in missing ET, the transverse mass (MT) between the lepton and the missing transverse momentum vector, and the effective mass defined as the scalar sum of the pT of the three leading jets, the pT of the lepton and the missing ET. Also tabulated are the 95 PCT exclusion limits on m_0 and m_(1/2) for the MSUGRA/CMSSM model.
CERN-LHC. Measurements of the per-event charged particle density distributions - dN/deta - over the |eta| range < 2.0, and the averaged charged particle multiplicity in the central |eta| range < 0.5, in several centrality regions in lead-lead collisions at a centre-of-mass energy of 2.76 TeV/nucleon.
CERN-LHC. Measurement of the mass distribution of di-jets produced in proton proton collisions at a centre-of-mass energy of 7 TeV. The data set has a total integrated luminosity of 1.0 fb-1 and dijet masses up to 4 GeV are used in the search of resonance production of new particles above background. Jets are reconstructed using the anti-kt clustering algorithm with the parameter R=0.6.
CERN-LHC. Measurement of the transverse momentum distributions of W+- bosons produced in proton-proton collisions at a centre-of-mass energy of 7 TeV from a data sample of total integrated luminosity of 31 pb-1. The normalized differential distribuitions for different definitions of the PT of the W+- (Born level, Dressed and Bare) are given separately for the electron and muon decay channels and combined together for the Born definition.