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IOP HEPP Particle Physics 2009

6–8 Apr 2009
University of Oxford
Europe/London timezone

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Session

Parallel Session 1 A - QCD and Electroweak

PP01A
6 Apr 2009, 16:00
University of Oxford

University of Oxford

Description

QCD and EW

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  1. 63. QCD matrix elements and truncated showers
    Frank Siegert (University of Durham)
    06/04/2009, 16:00
    QCD and EW
    An improved prescription of merging matrix elements with parton showers is presented, extending the CKKW approach. This new method preserves the logarithmic accuracy of the shower.
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  2. 54. Top Quark Mass Measurement using Matrix Element Analysis Technique and Lepton + Jets Channel
    Jacob Linacre (University of Oxford)
    06/04/2009, 16:15
    QCD and EW
    We present a top quark mass measurement using ttbar candidate events for the lepton+jets decay channel from ppbar collisions at 1.96 TeV at CDF. The top quark mass is extracted by employing an unbinned maximum likelihood method using per-event probability density functions calculated using signal (ttbar) and background (W+jets) matrix elements, as well as a set of parameterised jet-to-parton...
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  3. 16. DIS Charged Current Interactions in e+p data At ZEUS
    Katie Oliver (University of Oxford)
    06/04/2009, 16:30
    QCD and EW
    ZEUS is a multi-purpose detector located on the electron-proton HERA collider. Since an upgrade to HERA in 2000, the lepton beams may be longitudinally polarised. This allows tests of the chiral nature of the Standard Model to be undertaken. Of particular interest is the charged current cross-section, which the Standard Model tells us depends on the polarisation of the incoming lepton. Results...
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  4. 51. Super-leading Logarithms in QCD
    James Keates (University of Manchester)
    06/04/2009, 16:45
    QCD and EW
    Super-leading logarithmic terms have previously been observed in non-global QCD observables. This talk details a fixed order calculation of super-leading logarithms in the gaps-between-jets process. This calculation confirms previous results and extends them to O(alpha_s^5).
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  5. 56. Gaps between jets
    Simone Marzani (University of Manchester)
    06/04/2009, 17:00
    QCD and EW
    We study the effects of QCD radiation on the cross section for the production of two jets with a cut on the transverse momentum of any radiation in the rapidity gap between them at the Large Hadron Collider. This is process is of a great phenomenological interest on its own, and moreover it closely related to Higgs production in WBF. A deep understading of this calculation is also very import...
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  6. 66. Production of direct photons at ATLAS
    Mark Stockton (University of Birmingham)
    06/04/2009, 17:15
    QCD and EW
    The production of direct photons at ATLAS will be an ideal test of perturbative QCD (pQCD) in a kinematic region never observed before. Gaining a deeper understanding of pQCD is essential to searches for new physics at the LHC. In addition, differential cross-section measurements of direct photon production can be used to constrain parton density functions. The plans for the first direct...
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