how to discover the higgs boson*
TRANSCRIPT
How to discover the Higgs Boson*Laura Jeanty
* If it exists
First, make a Higgs Boson
www.wikipedia.com
E = mc2
www.wikipedia.com
Energy = mass x (speed of light)2
E = mc2
How to make energetic particles?
How to control moving particles?
How to control moving particles?
www.lbl.gov
1931The first particle accelerator
1% speed of light
1931
© CERN 2012
2012
© CERN 2012
2012
www.lbl.gov
The Large HadronCollider
© CERN 2012
99.9999991% speed of light
© CERN 2012
Questions?
What happens when two particles collide?
What happens when two particles collide?
What happens when two particles collide?
What happens when two particles collide?
Thank you, Quantum Mechanics!
What happens when two particles collide?
Thank you, Quantum Mechanics!
What happens when two particles collide?
www.wikipedia.com
What happens when two particles collide?
around 999,999,900,000 times
one time
What happens when two protons collide one trillion times?
Proton debris
a Higgs Boson!
Other particles
10 – 100,000 times
Questions?
Second, observe the Higgs that you made
What happens after we’ve produced a Higgs Boson?
(Almost) instantaneous decay into other particles
What happens after we’ve produced a Higgs Boson?
What happens after we’ve produced a Higgs Boson?
Higgs Boson
photonphoton
How do we see the particles?
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ATLAS Experiment © 2012 CERN
Panasonic FZ-100:• 10 – 60 pictures a second• 1 type of particle• Only sees “low energy” light
ATLAS detector:• 40 million pictures a second• (almost) all particles• Detects particles 1 billion times more energetic
We build a detector
ATLAS Experiment © 2012 CERN
The ATLAS detector
The ATLAS detector
J. Penwell2007
ATLAS Experiment © 2012 CERN
J. P
enw
ell2
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The ATLAS detector
ATLAS Experiment © 2012 CERN
ATLAS Experiment © 2012 CERN
An ATLAS picture
ATLAS Experiment © 2012 CERN
Mass of two photon events
Num
ber
of e
vent
s
Higgs? 99% probability
Interpreting many ATLAS pictures
What else will we see in the next few years?
www.wikipedia.comwww.arthursclipart.org
?
The more unusual, the better!