Post on 18-Jan-2016
FSU Experimental HEP Faculty
ToddAdams
SusanBlessing
HarveyGoldman S
SharonHagopian
VaskenHagopian
KurtisJohnson
HarrisonProsper
HorstWahl
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
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...
The Standard ModelThe 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
What are the Big Questions to be Answered?
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:
D0 at Fermilab
CMS at CERN
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
The D0 Experiment
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
Collider experiment which is built around the collision point to detect particles flying out in all directions
Latest results frompp Collisions at DØ
Detector in Collision Hall January 2001
D0 Data Taking
24 hours/day7 days/week
for the next 5+ years
currently recording a few million events/day
FSU People at D0
Latest results frompp Collisions at DØ
Jet Events Calorimeter Level 1 trigger
Run124640 event 524035
V. ZutshiBrookhaven
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.
CERN
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
CMS Detector
HCAL Under Construction
CERN testbeam 2002
Construction and testing at FNAL
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
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
Possible Thesis TopicsSearch 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