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