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The High-Energy Frontier
Meenakshi Narain
For the BU High Energy Experimental Groups:
g-2Super-KDzeroAtlasCMS
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The Standard Model
t bc s spin 1/2
W+W+
strong force ggweak force Z0Z0
electromagnetism W-W- spin 1
H spin 0Higgs
e e u dleptons quarks
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The D0 ExperimentFermilab• Group
– Faculty:• J. Butler, • U. Heintz, • M. Narain
– Students: • S. Fatakia, • K. Black, • L. Felligioni• S. Rappocio, • Y. Kratsnisky
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The D0 experiment
5000 tons400 physicistsRun I: 1992-1996100 pb-1
80 publications100 Ph.D.s
muon detector
calorimeter
tracker
• Proton-antiproton collisions– Ecom = 2 TeV
– highest Ecom !
• Top quark (discovery)• W and Z bosons (precision
measurements)• Physics beyond SM• Search for
– Higgs
– Supersymmetry
– Technicolor
– others
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silicon detector
b
800,000 channels10 m hit resolution
1 m
B(b + X) 20% detect muons1
2 life time 1.5 ps c 0.5 mm
0.5 mm
precise tracking silicon microstrip detectors
topHiggsSUSY
Technicolor
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What are we doing?
• Trigger Electronics– interaction rate: 2 MHz
– max readout rate: 50 Hz
– recognize interesting events online
• muon trigger• silicon trigger• state-of-the-art, high-speed digital
electronics
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The Super-K/K2K Experiments• Group:
– Faculty: • E. Kearns, L. Sulak, J. Stone
– Postdoctoral fellows:• A. Habig, K. Scholberg, C. Walter
– Students:• S. Desai, M. Earl, S. Rich, C. Orth
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Super-Kamiokande
updown
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The g-2 Experiment
• Group
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The g-2 Experiment
• Due to its magnetic moment
• a muon precesses in a magnetic field
• a precise measurement of g is sensitive to – internal structure of muon – new heavy particles that interact with the muon
Sme
gs
2
Bme
g2
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The g-2 Experiment
Brookhaven
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• Proton-proton collisions at 14 TeV
• probe SM in new energy regime
Higgs ATLASATLAS
CMSCMS
The Large Hadron Collider
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The ATLAS Detector
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ATLAS Muon Chambers
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ATLAS Electronics
Endcap chamber
Electronics stackMezzanine board
Hedgehog board
ASD Chips
All being built at BU and Harvard.
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CMS