Department of Physics University of Arizonashufang/talk/recruit_10.pdfDepartment of Physics University of Arizona Theoretical particle physics S. Su Prospective Grads 2010 2 Welcome!

S. Su Prospective Grads 2010 1

Department of Physics

University of Arizona

Theoretical particle physics


Welcome!I am Shufang!


What is particle physics?

what’s hot today?


• Fundamental interactions – Gravity– Electromagnetic force– Weak interaction burning of the sun … – Strong interaction holds proton and neutron …

• Building blocks of matter -- elementary particles

smaller distance : higher energy

Particles and Forces

forces


Standard Model of Particle Physics-



Strong interactions



Strong interactions



Strong interactionsNeutrinos



Strong interactionsNeutrinos



Strong interactions

Origin of mass

Neutrinos



Strong interactions

Origin of mass

Neutrinos



Strong interactions

Origin of mass

Unification+gravity

Neutrinos



Strong interactions

Origin of mass

Unification+gravity

Neutrinos


-

Quiz : what’s this place?


-



-



-

Large Hadron Collider (2009)pp collision @ 7-10 TeV


-

p p

Large Hadron Collider (2009)pp collision @ 7-10 TeV


-

LHC (2009)

p p


-

LEP

e-e+

LHC (2009)

p p


-

LEP

e-e+

Tevatron (now)

p

LHC (2009)

p p


-

LEP

e-e+

Tevatron (now)

p

LCLHC (2009)

p p


-

LEP

e-e+

Tevatron (now)

p

LC

We live in an exciting era when rich data is / will become available

LHC (2009)

p p


Group


Group Members-

• Faculty:

KeithDienes

InaSarcevic

ShufangSu

DougToussaint


Group Members-

• Postdocs Current: Alexei Bazavov (2007) FSU → UA → Brookhaven national labBrooks Thomas (2007) Michigan → UA → University of HawaiiGouranga Nayak (2008)

Incoming: Vikram Rentala (2010) UC Berkeley → UA Jongjeong Kim (2010) Seoul University → UA

Previous: Rikard Enberg (2007-2008) Berkeley → UA → Uppsala University, SwedenDru Renner (2004-2007) MIT → UA → DESYHock-Seng Goh (2004-2007) Maryland → UA → BerkeleySabine Hossenfelder (2003-2005) Germany → UA → Santa BarbaraIrina Mocioiu (2003-2005) Stony Brook → UA → Penn State University


Students (Yes!)

Ethan DolleSu

Arif Erkoca

Sarcevic

Vaibhav WasnikDienes

Xinyu MiaoSu

Menika SharmaDienes

Walter FreemanToussaint


Students (Yes!)

Ethan DolleSu

Arif Erkoca

Sarcevic


Xinyu MiaoSu

Menika SharmaDienes



Students (Yes!)

Ethan DolleSu

Arif Erkoca

Sarcevic


Xinyu MiaoSu

Menika SharmaDienes



Students (Yes!)

Ethan DolleSu

Arif Erkoca

Sarcevic


Xinyu MiaoSu

Menika SharmaDienes



Students (Yes!)

Ethan DolleSu

Arif Erkoca

Sarcevic


Xinyu MiaoSu

Menika SharmaDienes



Related groups-

• Nuclear physics

• Heavy Ion

• Experimental high energy

Barrett, Fleming, van Kolck

Rutherfoord, Shupe, Johns, Cheu, Varnes

Rafelski, Thews

• Theoretical astrophysics group Fang, Melia


Research


Energytheo

ryex

p


Energy10-3 GeV

theo

ryex

p


Energy10-3 GeV

theo

ryex

p

Toussaint


Energy10-3 GeV 103 GeV

q lg h

…

theo

ryex

p

Toussaint



q lg h

…

theo

ryex

p

Toussaint

Su



q lg h

…

theo

ryex

p

Toussaint

Su

1019 GeV



q lg h

…

theo

ryex

p

Toussaint

Su

Dienes

1019 GeV



q lg h

…

theo

ryex

p

Toussaint

Su

Dienes

1019 GeV

Sarcevic


Lattice Gauge Theory at U. of A-

D. Toussaint (faculty), Alexei Bazavov (postdoc)

Quantum chromodynamics (QCD) is theory of strong interactions.

We know the Lagrangian (equation of motion) but can’t solve problems (nonlinear, strongly coupled, relativistic, ...)

Use supercomputers (and some brains) to do the Feynman path integral numerically.

Lattice Gauge Theory

at U. of A.Doug Toussaint (faculty), Dru Renner (postdoc)

Quantum chromodynamics (QCD) is theory of strong interactions.

We know the Lagrangian (equations of motion), but can’t solve prob-

lems (nonlinear, strongly coupled, relativistic, . . . )

Use supercomputers (and some brains) to do the Feynman path integral

numerically.

Show two simple examples on next two slides.

But also complement current experiments:

June 2005 (both):

Lattice gauge theory: FD+ = 201 ± 17 MeV

Experiment (CLEO-c: FD+ = 223 ± 17 MeV.


Lattice Gauge Theory at U. of A-

QCD spectrum calculations predict particle mass ratios from first principles

and are reasonably close to right and are getting better

Calculated spectrum results compared to real world


Electroweak Physics at U. of A-

• Standard Model: a successful model • Many open questions requires new physics beyond the SM

S. Su (faculty), Brooks Thomas (postdoc), students



• Standard Model: a successful model • Many open questions requires new physics beyond the SM

S. Su (faculty), Brooks Thomas (postdoc), students

We work on physics beyond the SM that could potentially be discovered in the current and upcoming experiments.



Theory Experiments



Theory Experiments

Particle physics

Astrophysics



Theory Experiments

Particle physics

Astrophysics

Dark matter, dark energyCMB, BBN Baryongenesis…


Welcome to my colloquium tomorrow !-

Beyond the WIMP Miracle


String Phenomenology at U. of A-K. Dienes (faculty) Brooks Thomas (Postdoc), students

String Phenomenology




• the “interplay” or “meeting-ground” between Planck-scale physics and GeV-scale physics• the “art” of using the new insights from string theory in order to understand, explain, and predict what physics at next energy scale is going look like







Standard Model • choice of gauge group• number of generations• masses• mixings, etc …





Extensions to SM: • SUSY• GUT’s• hidden sectors• technicolor…





Formal Issues: • string vacuum selection• non-pert. dynamics• string duality• new mathematical structure …






Formal Issues: • string vacuum selection• non-pert. dynamics• string duality• new mathematical structure …

String Cosmology: • role of dilaton• effects of light d.o.f.’s• extra dimensions• CC problem …



Keith is now the Program Director for Theoretical High-Energy Physics and Cosmology at the National Science Foundation in Washington DC. He "oversees all NSF-funded research in these areas across the United States". $$$$ = very important.

๏ This is temporary, and he will be returning to Arizona "soon".๏ He can always be reached by email, however.๏ He still continues his research activity ...

Message from Keith:


Neutrino Physics at U. of A-

Ina Sarcevic (faculty), Gouranga Nayak (postdoc), students

Low energy (supernovae neutrinos)

Ultrahigh energy (Cosmic neutrinos)

• Probing Dark Matter with Neutrinos• Black Hole Production at the LHC• Astrophysical Neutrinos from Charm


Research Activities


Research Activities for Students-• Seminars, colloquiua and Visitors

• Group meetings− Journal club − brown bag lunch (with nuclear theory group)− discussion group on dark energy and early universe (with theoretical astrophysics group and astronomy dept.)

• Summer schools and conferences− TASI, SLAC summer school, Europe ones,…− conferences/workshops,…− international conferences: SUSY03, LATTICE06, “Rethinking Gravity”, string vacuum project, …


Research Activities for Students-• Seminars, colloquiua and Visitors

• Group meetings− Journal club − brown bag lunch (with nuclear theory group)− discussion group on dark energy and early universe (with theoretical astrophysics group and astronomy dept.)

• Summer schools and conferences− TASI, SLAC summer school, Europe ones,…− conferences/workshops,…− international conferences: SUSY03, LATTICE06, “Rethinking Gravity”, string vacuum project, …

We will keep you (very) busy !


Hope to see you in the Fall!

Documents

Department of Physics University of Arizonashufang/talk/recruit_10.pdfDepartment of Physics University of Arizona Theoretical particle physics S. Su Prospective Grads 2010 2 Welcome!