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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 2 A - QCD and Electroweak / Higgs

PP02A
7 Apr 2009, 11:00
University of Oxford

University of Oxford

Description

11:00 - 12:30 - QCD and EW
12:30 - 12:45 - Higgs

Presentation materials

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  1. 40. Measuring Z->ee with ATLAS
    Michael James Flowerdew (University of Liverpool)
    07/04/2009, 11:00
    QCD and EW
    Some of the earliest measurements to be made with the ATLAS detector are of the rate and properties of Z boson production. Intense theoretical attention in recent years has culminated in next-to-next-to-leading order calculations of the production cross section of this channel, with just a few percent uncertainty. Confirmation of these predictions with LHC data, as soon as possible after...
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  2. 37. The Z boson a_T distribution
    Rosa María Durán Delgado (University of Manchester)
    07/04/2009, 11:15
    QCD and EW
    We present theoretical predictions for a novel variable to study low transverse momentum vector boson production at hadron colliders. The new variable referred to as $a_T$ has been pointed out to have experimental advantages over the usual $p_t$ distribution and our study in conjunction with forthcoming accurate experimental data can help to shed light on perturbative radiation as well as...
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  3. 46. Spin correlation in top quark pair produciton at ATLAS
    Simon Head (University of Manchester)
    07/04/2009, 11:30
    QCD and EW
    The high mass and large width of the top quark corresponds to a Standard Model prediction for a lifetime shorter than the timescale for strong interactions, implying that the top quark decays before hadronisation. Therefore, properties such as the spin correlation in the $t\bar{t}$ system are transferred to the decay products. In this talk I will discuss the possibility of measuring this...
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  4. 77. A study of low pt electron reconstruction efficiencies in ATLAS
    Susan Cheatham (University of Lancaster)
    07/04/2009, 11:45
    QCD and EW
  5. 36. Data driven methods of a W/Z cross section measurement in ATLAS
    Eleanor Dobson (University of Oxford)
    07/04/2009, 12:00
    QCD and EW
    An important aim of the LHC is the precise measurement of W and Z boson production cross sections. It is important to make a data driven measurement of the cross sections and, whenever possible, not to rely on Monte Carlo simulation. Such a method of determining these cross sections in the ATLAS detector is outlined for the electron channel.
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  6. 78. Constraining PDFs at the LHC: The W asymmetry
    Kristin Lohwasser (University of Oxford)
    07/04/2009, 12:15
    QCD and EW
    The asymmetry in the rapidity distribution of positive and negative W Bosons can help to put constraints on the parton distribution functions (PDFs). It is directly related to differences in the momentum distribution of u and d quarks and will be used to improve our knowledge on the valence quark distributions at low x. This talk will present the prospects for the W asymmetry measurement with...
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  7. 31. Fast simulation and the Higgs with ATLAS
    Neil Cooper-Smith (Royal Holloway)
    07/04/2009, 12:30
    Higgs
    Presented is an outline of the current simulation options available for use in the ATLAS collaboration. Particular attention is given to the ATLAS fast simulation, ATLFAST. By default, ATLFAST does not account for particle losses due to the reconstruction process. Therefore, a set of parametrisations of the photon reconstruction efficiency, as seen in full simulation, have been incorporated...
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