CMS Data Analysis
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Transcript of CMS Data Analysis
CMS Data Analysis
Dr. James Keating Dr. Patrick Mooney Ms. Jill Ziegler
Washington High School Trinity School Hamilton High West
South Bend, IN South Bend, IN Hamilton, NJ
Giancarlo Carozza Leland Dunwoodie Corey Hostetler
St. Joseph High School Lakeshore High School Bethany Christian Schools
South Bend, IN Stevensville, MI Goshen, IN
Data Sets
Large Hadron Collider
CMS Detector
Physics Plots: phi vs eta
• note cutoffs at η of 1.5 correspond to gaps in the Ecal
Physics Plots: phi vs eta
Cosmic Muons and the Detector
• curved by magnetic field
Cosmic Muons and the Detector
• curved by magnetic field • detector breaks tracks into two opposite signed muons
Physics Plots: Beta
• dielectrons: smooth increasing histogram
Physics Plots: Beta
• dielectrons: smooth increasing histogram
• dimuons: peak near zero
Physics Plots: Muonsphi vs eta for beta <0.05
Physics Plots: Mass PlotsElectrons
Physics Plots: Mass PlotsElectrons
Physics Plots: Mass PlotsMuons
Physics Plots: Mass PlotsMuons
Physics Plots: Mass PlotsElectrons
Mass Extremes Separated
Physics Plots: Mass PlotsMuons
Mass Extremes Separated
Conclusions• Access and Read Data
Name Mass (GeV/c2) Dimuon Dielectron
J/ψ 3.1 GeV/c2 3 1
ψ (2S) 3.7 GeV/c2 2 0
ϒ (1S) 9.5 GeV/c2 2 1
ϒ (2S) 10.0 GeV/c2 1 0
ϒ (3S) 10.3 GeV/c2 1 0
Z0 91 GeV/c2 2 (180 pairs) 3 (3000 pairs)
0 = Not Seen 1 = Hint 2 = Clear 3 = Strong
Conclusions• Future
Fit Masses Production Cross Section Ratio of Z-->μμ to Z-->ee MORE DATA Develop experimental modern physics course activity
• Report: http://cms.michianastem.org/Summer+2013