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

The Standard Model The Standard Model represents our best knowledge of everything.

Includes 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

Forces

Strong nuclear force (QCD)

Electroweak electromagnetism weak force

Gravity

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?

?

??

?

? ?

? ?? ? ?

?

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

Already 4x larger than previous data sets

Will take data until 2009

Upgrade in 2005

Built around the collision point to detect particles flying out in all directions

Calorimeter

FSU has a major responsibility for the D calorimeter

Uranium-Liquid Argon sampling

calorimeter

Measure energy of hadrons and

electrons

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

Physics of D0

Higgs Boson

Supersymmetry

Single Top

Top Quark Properties

Electroweak Physics

QCD - Quantum ChromoDynamics.

Other new particle searches Leptoquarks, extra dimensions, technicolor, etc.

Recent Publications “Search for Doubly-charged Higgs Boson Production in the

Decay H++H-- ++-- with the D Detector at s=1.96 TeV”, V. M. Abazov et al., Phys. Rev. Lett 93, 141801 (2004).

“Observation and Properties of the X(3872) Decaying to J/+- in ppbar Collisions at s=1.96 TeV”, V. M. Abazov et al, submitted to PRL

“Search for Supersymmetry with Gauge-Mediated Breaking in Diphoton Events at D”, V. M. Abazov et al, submitted to PRL.

“Measurement of Dijet Azimuthal Decorrelations at Central Rapidities in ppbar Collisions at s=1.96 TeV”, V. M. Abazov et al, submitted to PRL.

“Measurement of the Bs0 Lifetime in the Exclusive Decay

Channel Bs0 J/ ”, V.M. Abazov et al, submitted to PRL.

~700 scientists, students and engineers

82 institutions

20 countries

130 Ph.D. Dissertations

150 papers published

The DØ CollaborationThe DØ Collaboration

FSU Experimental HEP Faculty

ToddAdams

SusanBlessing S

SharonHagopian

VaskenHagopian

HarrisonProsper

HorstWahl

YuriGershstein

FSU experimental HEP graduate students

Jun Miao

Sinjini Sengupta

Suharyo

Sumowidagdo

José

Lazoflores

Daekwang

Kau

Dan

Duggan

FSU HEP postdocs

Norm

Buchanan

Bill

Lee

Examples of FSU graduates Jeff McDonald (DØ, PhD 1999)

Dissertation: study of single top production Now at FSU (Research Scientist), was at U. of Pittsburgh

Dan Karmgard (DØ, PhD 1999) Dissertation: search for leptoquarks Now at U. Notre Dame (CMS)

Richard Cavanaugh (Aleph, PhD 1999) Dissertation: measurement of W mass U. Florida (working on CMS, Grid), was at U. of Heidelberg

Brian Connolly (DØ, PhD 2002) Dissertation: measurement of top quark mass in hadronic decay Now at Columbia University (HiRes – cosmic rays)

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 years

Finish coursework Spend summers at Fermilab learning the experiment

Next several years Hardware project - calorimeter Data taking Programming (C++, Linux, scripting) 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

FSU People at D0