Z simulation at different luminosities One plot from the NSW TDR is to be presented as part of the ATLAS presentation at the LHCC open meeting The figure in the TDR wont be officially approved until the CB approves the TDR ID: 335233
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Slide1
Performance plot for approvalZ’ simulation at different luminositiesSlide2
One plot from the NSW TDR is to be presented as part of the ATLAS presentation at the LHCC open meeting.The figure in the TDR won’t be officially approved until the CB approves the TDR.
Since the LHCC open meeting is the week before the CB, approval of this plot is being requested now.Slide3
Explanation
A
Z’ sample has been produced with both
muons
going in the forward region namely 1.1<|
h
|
2.9 (generator level cuts). A further cut selecting both
muons
going into the MDT region has been applied |
h
|
<2.
The background conditions expected at 0.2x10
34
, 3x10
34
and 5x10
34
have been obtained by adding to the Z’ sample, data taken at 0.26x 10
34
with a minimum bias trigger and overlaying in the
muon
spectrometer 10 events to obtain an equivalent luminosity of about 3x10
34
and overlaying 20 events to obtain an equivalent luminosity of about 5x10
34
. The uncertainty we estimate on the equivalent luminosity is about 50%.
The events in the three samples are selected using the standard Z’ analysis cut flow, which requires the presence of three
muon
stations on the track to ensure good momentum resolution at high
momenta
Slide4
Z’ reconstruction at different luminosities
The plot shows the mass distribution for reconstructed Z’ in samples obtained overlaying 1(black
histo
) , 10 (blue
histo
) or 20(red
histo) minimum bias events taken at 2.4x10^33. The equivalent luminosity for the different sample is 2.6x10^33 overlay 1About 3x10^34 overlay 10 About 5 x10^34 overlay 20Each distribution is scaled to the total number of events in the specific sample and the relative difference is due to a reduction in the selection efficiency.The events are selected if both muons are reconstructed