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Experimental SubatomicPhysics at UBCColin GayMonday, September 5, 2011 1
Tools of the Trade
Subatomic PhysicsThe study of nature, matter, energy in their mostfundamental manifestations
Subatomic PhysicsThe study of nature, matter, energy in their mostfundamental manifestations
Subatomic PhysicsThe study of nature, matter, energy in their mostfundamental manifestations
Exciting Times• Discovery of Higgs Boson after 40 years of
searching!Mass Spectrum and Systematic Uncertainties
7 TeV + 8 TeV data
100 110 120 130 140 150 160Ev
ents
/ G
eV0
200400600800
10001200140016001800200022002400
Data 2011 and 2012 = 126.5 GeV)HSig + Bkg inclusive fit (m
4th order polynomial
Selected diphoton sample
-1 Ldt = 4.8 fb∫ = 7 TeV, s
-1 Ldt = 5.9 fb∫ = 8 TeV, s
ATLAS Preliminary
[GeV]γγm100 110 120 130 140 150 160
Data
- Bk
g
-100
0
100
Background+signal fit, signal fixed at126.5 GeV
23788 events (7 TeV)35271 events (8 TeV)
Largest uncertainties7 TeV 8 TeV
Photon id efficiency 8.4% 10.8%Theory up to 25%
(gg ! H + 2 jets)Jet E-scale (2-jets) 9-18%Underl. evt. (2-jets) 6-30%Higgs pT up to 12.5%Bkgd Param (evts) 0.2-4.6 0.3-6.8m�� resolution 14%
� energy scale 0.6%
Kerstin Tackmann (DESY) Search for the Higgs boson in the diphoton decay 15 / 18
Still manyMysteries
Still manyMysteries
Still manyMysteries
What is Dark Matter?Are there extra dimensions?
Still manyMysteries
Mysteries:
4Monday, September 5, 2011
What is Dark Matter?Are there extra dimensions?
Still manyMysteries
Mysteries:
4Monday, September 5, 2011
Mysteries:
4Monday, September 5, 2011
What is Dark Matter?Are there extra dimensions?
Why is there any matter left to make us?
TRIUMF is an enormous resource for our activities• Particle beams for experiments and tests (cyclotron)• Detector development (Laboratory for Advanced Detector Development)• Machining, fabrication• Design, engineering• “Interdisciplinary” work with medical and other applications
Douglas BrymanColin GayMike HasinoffChristopher HeartyAlison ListerNigel LockyerTom MattisonJanis McKenna
Scott OserHirohisa TanakaJohn BehrJens DillingReiner KrückenLia MermingaOliver Stelzer-ChiltonStanley Yen
We look forward to hearing from you
email any of these people or me ([email protected])