FSU Experimental HEP Faculty

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FSU Experimental HEP Faculty
Todd Adams
Harvey Goldman
Sharon Hagopian
Susan Blessing
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Vasken Hagopian
Kurtis Johnson
Harrison Prosper
Horst Wahl
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What is High Energy Physics?

• High Energy Physics is the study of the most
  basic particles and forces of nature
• We explore the smallest scales and the highest
  energies
• We want to know what really makes the Universe
  tick
• Also known as HEP or as particle physics

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What have we done before?

• Discovered lots of new particles
• quarks, neutrinos, taus, Z bosons,
• Determined what protons and neutrons are made of
• Combined two "fundamental" forces of nature
• electromagnetism
• the weak force
• Created a model which explains MOST of what we
  have observed...

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The Standard Model
The Standard Model is our best knowledge of
everything. It consists of all known particles
and forces (except gravity). By comparing
experimental results with predictions from the
Standard Model, we test our understanding of the
universe The Standard Model has worked
remarkably well for more than 20 years
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What are the Big Questions to be Answered?
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What is the origin of mass? Can all of the
forces be unified? How do neutrinos
oscillate? Why do we see more matter than
anti-matter? What is out there that we have
never observed?
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FSU High Energy Physics Program

• We currently work on two major experiments

CMS at CERN
D0 at Fermilab
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Fermilab

• Tevatron
• Currently, the world's premier accelerator
  facility
• Proton-Anti-Proton collisions at a center of mass
  energy of 1.9 trillion electron-volts
• Two collider experiments
• D0 and CDF
• Other physics
• neutrino physics, CP-violation,
• astrophysics and more
• Located outside of Chicago
• Scientists from all around the world come to
  Fermilab to do high energy physics

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The D0 Experiment

• Collider experiment which is built around the
  collision point to detect particles flying out in
  all directions

• Started taking data Spring, 2001
• Will take data until 2007
• There will be an upgrade in 2005
• We will end up with a petabyte of data

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D0 Data Taking
24 hours/day 7 days/week for the next 5
years currently recording a few million
events/day
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FSU People at D0
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Jet Events

• Calorimeter Level 1 trigger
• Run124640 event 524035

V. Zutshi Brookhaven
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Physics of D0

• Higgs Boson
• needed to resolve electroweak symmetry breaking
  and responsible for creating mass. Not yet
  discovered, but there are many indications that
  D0 and CDF can find it.
• Supersymmetry
• theory which predicts each known particle has a
  partner, none of which have ever been seen.
• Top Quark
• discovered at D0 and CDF. Now we will explore
  its properties.
• QCD - Quantum ChromoDynamics.
• D0 can explore how well it describes
  proton-anti-proton collisions and study what
  makes up the proton.
• Other new particle searches
• Technicolor, Leptoquarks, etc.

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CERN
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The CMS Experiment

• Large Hadron Collider (LHC)
• at CERN
• Proton-proton collisions at 14 trillion
  electron-volts
• two primary experiments CMS and Atlas
• begins operation in 2007
• Compact Muon Spectrometer (CMS)
• Vasken Hagopian is co-leader of the US-CMS effort
• Florida State is involved in the hadronic
  calorimeter which is being tested and constructed
  at FSU, Fermilab and CERN

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CMS Detector
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HCAL Under Construction
Construction and testing at FNAL
CERN testbeam 2002
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What do we do?

• Hardware
• Design, develop, test, and build electronics and
  detectors
• Data-taking (shifts)
• Software
• Code writing and analysis algorithm development
• Data analysis
• discovery, measurements, tests
• Presentations at meetings, seminars and
  conferences
• Journal publications

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What will you do?

• First 2-3 years
• Finish coursework
• Spend summers at Fermilab learning the experiment
• Next several years
• Some hardware project (STT, silicon, ???)
• Data taking
• Programming (C, UNIX, scripting, graphics)
• Data analysis on your thesis topic
• Final year
• Presentation and publication of thesis work
• Thesis defense
• You will spend significant time at Fermilab

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Possible Thesis Topics
Search for/Discover the Higgs Boson Search for
new particles such as Supersymmetry, Technicolor,
Leptoquarks, Cold Dark Matter, Extra Dimensions
etc. Top Quark Physics QCD Studies including
measuring the contents of the proton W mass
measurements