Description
11:00 - 12:30 - QCD and EW
12:30 - 12:45 - Higgs
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...
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...
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...
Susan Cheatham
(University of Lancaster)
07/04/2009, 11:45
QCD and EW
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.
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...
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...
