jets as a probe of the quark gluon plasma jets as a probe of the quark gluon plasma christine...
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![Page 1: Jets as a probe of the Quark Gluon Plasma Jets as a probe of the Quark Gluon Plasma Christine Nattrass Yale University Goldhaber Lecture 2008 Christine](https://reader035.vdocument.in/reader035/viewer/2022062423/5697bfa91a28abf838c9a1da/html5/thumbnails/1.jpg)
Jets as a probe of theQuark Gluon PlasmaJets as a probe of theQuark Gluon Plasma
Christine NattrassYale University
Goldhaber Lecture 2008
Christine NattrassYale University
Goldhaber Lecture 2008
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 22
OutlineOutline
What is a quark gluon plasma?What is a quark gluon plasma?
Why do we want to study it?Why do we want to study it?
How do we study it?How do we study it?
What have we learned?What have we learned?
ConclusionsConclusions
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 33
The structure of matterThe structure of matter
http://www.ehs.utoronto.ca/services/radiation/radtraining/module1.htm
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 44
Who was Gertrude Goldhaber?Who was Gertrude Goldhaber?
Gertrude Scharff GoldhaberGertrude Scharff GoldhaberJuly 14, 1911 — February 2, 1998July 14, 1911 — February 2, 1998http://cwp.library.ucla.edu/Phase2/http://cwp.library.ucla.edu/Phase2/Goldhaber,[email protected],[email protected]
http://upload.wikimedia.org/wikipedia/commons/a/aa/Beta-minus_Decay.svghttp://universe-review.ca/I14-05-nuclearenergy.jpghttp://www.nap.edu/html/biomems/ggoldhaber.html
Beta decay – demonstrated that Beta decay – demonstrated that the beta particle was an electronthe beta particle was an electron
Shell model – provided Shell model – provided experimental evidence for experimental evidence for closed shells in heavy nucleiclosed shells in heavy nuclei
Created first 3-D plotCreated first 3-D plot
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 55
Nucleons – the proton and neutronNucleons – the proton and neutron
Neutron Protonhttp://en.wikipedia.org/wiki/Image:Quark_structure_neutron.svg http://en.wikipedia.org/wiki/Image:Quark_structure_proton.svg
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 66
Other particles - hadronsOther particles - hadrons
Baryons Mesons
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 77
The Standard ModelThe Standard Model
Electromagnetic forceElectromagnetic force
http://e4.physik.uni-dortmund.de/bin/view/ATLAS/SmBilder?PhotoarchivePlugin_page=1&PhotoarchivePlugin_view=detailed
Strong forceStrong force
Weak forceWeak force
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 88
What keeps the nucleus together?What keeps the nucleus together?
distance
stre
ngt
h
Electromagnetic Electromagnetic forceforce
StrongStrongforceforce
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 99
How to make a Quark Gluon PlasmaHow to make a Quark Gluon Plasma
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 1010
Evolution of the UniverseEvolution of the Universe
Reheating Matter ?The universe gets cooler !
?Need temperatures
around1.5·1012 K
~106 times hotter than the core of the sun
106 yrs
3 min
6 sec
2·10-6 sec
2 10-10 sec
10-35 sec
10-35 sec
109 yrs ?
10-44 sec
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 1111
A heavy ion collisionA heavy ion collisionRelativistic pancakes
Quark soup
Explosive hadron soda
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 1212
Relativistic Heavy Ion ColliderRelativistic Heavy Ion Collider
STARSTAR
PHENIXPHENIX
PHOBOSPHOBOSBRAHMSBRAHMS
1.2k1.2k
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 1313
The STAR detectorThe STAR detector
~4m~4m~4m~4m
~4m~4m~4m~4m
Over 1,200 tonsOver 1,200 tonsOver 1,200 tonsOver 1,200 tons
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 1414
Peripheral collisionPeripheral collision
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Central collisionCentral collision
~2000 tracks~2000 tracks
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 1616
What are jets?What are jets?
proton
proton
Jets –hard scattering of Jets –hard scattering of partons (quarks and partons (quarks and gluons)gluons)
Studied in dozens of Studied in dozens of experimentsexperiments
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 1717
Jets – azimuthal correlationsJets – azimuthal correlations
trigger Phys Rev Lett 90, 082302
p+p p+p dijet dijet
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 1818
Jets – azimuthal correlationsJets – azimuthal correlations
p+p p+p dijet dijet
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 1919
Looking in two dimensionsLooking in two dimensions
d+Aud+Au
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 2020
In two dimensions in Au+AuIn two dimensions in Au+Au
nucl-ex/0701074
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 2121
What I've studiedWhat I've studied
nucl-ex/0701074
Different systems and Different systems and energiesenergies
Cu+Cu Cu+Cu √√ssNNNN = 200 GeV = 200 GeV
Cu+Cu Cu+Cu √√ssNNNN = 62 GeV = 62 GeV
Au+Au Au+Au √√ssNNNN = 62 GeV = 62 GeV
Different particlesDifferent particlesKK00
SS,,,,
Results:Results:Jet looks like p+p, Jet looks like p+p, Ridge Ridge looks looks like the rest of the A+A collisionlike the rest of the A+A collisionRidge Ridge grows with energygrows with energyThe fewer nucleons in the The fewer nucleons in the collision, the smaller the collision, the smaller the RidgeRidge
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ConclusionsConclusionsIf we get nuclear matter If we get nuclear matter dense enough, we make dense enough, we make a new phase of mattera new phase of matter
This quark gluon plasma This quark gluon plasma is similar to what was is similar to what was present in the early present in the early universeuniverse
We can produce a QGP We can produce a QGP in heavy ion collisionsin heavy ion collisions
We can study it using We can study it using probes such as jetsprobes such as jets proton
proton
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Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008Christine Nattrass (Yale), Goldhaber Seminar, BNL, May 23, 2008 2323
ConclusionsConclusions
We see evidence of a hot, We see evidence of a hot, dense medium from dense medium from studying jets at RHICstudying jets at RHIC
One of the jets almost One of the jets almost disappearsdisappears
The other jet is modified The other jet is modified dramaticallydramatically
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Many, many thanks toMany, many thanks to
John HarrisJohn Harris
Helen CainesHelen Caines
Jana BielcikovaJana Bielcikova
The entire Yale group,The entire Yale group,past and presentpast and present
STARSTAR