Insights into Top Quark EW Coupling Precision Measurement
Exciting images and information about top quark EW coupling precision measurement by Mustapha BIYABI on March 11, 2024. Explore 2D plots of top and topbar mass, boosted decision trees for analyzing signal efficiency, kinematic fitting results, lepton energy outcomes, Z boson mass measurement variations, and details about the upcoming Z Boson workshop with statistical analysis tutorials on March 19-20.
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Presentation Transcript
Top Quark EW Coupling Precision Measurement Mustapha BIYABI 11 March 2024
2D Plots 2D Plots Top Mass vs Topbar Mass: Signal Single Top
Boosted decision trees Tried to use Boosted decision trees : Issue : Signal Efficiency: test sample(training sample)
Kinematic Fitting Kinematic Fitting 4-Mometum Component of each Final state After and Before Fitting : When it succeed !!
Lepton Energy results Lepton Energy results Without Kinematic Fitting : With Kinematic Fitting : For the jets : the fitting fails to deliver the desired result Because : - Setting Soft Constraints implies Big probability to fail. - Absence of Neutrino 4 Component.
Z Mass Measurement Z Mass Measurement The proposal is to investigate how the measured mass of the Z boson changes when different assumptions about the Z boson's width are made during the analysis. Where the width of Z can be treated in several ways during the fitting process : Fixed to the World Average: The width is set to a constant value known from previous measurements and world averages. *(W mass). Constrained to Follow the mZ Value of the Fit: The width is allowed to vary in a way that is theoretically constrained by the fitted mass (mZ) of the Z boson. Fitted in the Fit Simultaneously but Independently of the Mass: The width is treated as an independent parameter in the fit, meaning it is allowed to vary freely without any direct constraints imposed by the mass.
Z Mass Measurement Workshop Z Mass Measurement Workshop Measurement of the Z-Boson Workshop will be hold : from 19 To 20 March. The workshop will have a Mini-tutorial about statistical analysis (hands-on) :
