experimental subatomic physics at ubc · subatomic physics the study of nature, matter, energy in...

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 (cgay@physics.ubc.ca)