J. Hewett, July 2014 SLAC Particle Theory Overview.
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Transcript of J. Hewett, July 2014 SLAC Particle Theory Overview.
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J. Hewett, July 2014
SLAC Particle Theory Overview
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Faculty & Staff:
Stan Brodsky Shamit Kachru
Lance Dixon Michael Peskin
JoAnne Hewett Thomas Rizzo
Stefan Höche Eva Silverstein
Professor
ProfessorProfessor
Professor
Professor – ½ campus
Senior Staff
Associate Staff
Professor – ½ campus
Group Members
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Research Associates FY14:
Joshua Berger James Sully
Tim Cohen (Oregon via IAS) Devin Walker
Matthew Dolan (Melbourne) Hua-Xing Zhu
Ye Li
BSM, Flavor,Dark Matter Models
BSM, Collider Physics,Dark Matter Models
BSM, Collider Physics,Dark Matter Models
BSM, Collider Physics,Dark Matter Models
QCD, Collider Physics
QCD, Collider Physics
BlackHole Information Problem
Group Members
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FY11 Graduate Students: Where are They Now?Daniele AlvesNing BaoSiavosh BehbahaniKassahun BetreBoucher-VeronneauRandy CottaXi DongSarah HarrisonSonia El-HedriAnson HookBart HornAhmed IsmailEder IzaguirreMartin JankowiakAndrew LarkoskiMy Phuong LeJeff PenningtonMatthew RowleyDusan SimicHuajia Wang
WackerSilversteinWackerPeskinDixonHewettSilversteinKachruWackerWackerSilversteinHewettWackerWackerPeskinHewettDixonHewettKachruKachru
NYUCalTechBoston UnivStanford (Teaching)IndustryUC Irvine StanfordHarvardMainzIASColumbiaArgonnePerimeterHeidelbergMITTeaching local CCIndustryStill@SLACIndustryStanford
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QCD (Brodsky, Dixon, Höche, Peskin)
Flavor Physics(Hewett, Rizzo)
BSM Pheno(Hewett, Rizzo)
Astro Interface(Hewett, Kachru,Rizzo, Silverstein)
Formal Theory(Dixon, Kachru, Silverstein)
Experimental Programs
Particle Theory Program: At a Glance
Higgs Physics(Dixon, Hewett, Peskin, Rizzo)
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Public View of SLAC Theory
Lance Dixon writes forScientific American
JoAnne Hewett discussesCP Violation onThrough the Wormholewith Morgan Freeman
Lance’s work featured on Big Bang Theory
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The Standard Model of Particle Physics
Pointlike particles
Force Carriers
communicate between
particles
Interactions based on
symmetries
Building Blocks of Matter:
This structure is experimentally confirmed!
Where is the Higgs Boson!
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The Large Hadron Collider: CERN, Geneva, Switzerland
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Events at the Large Hadron Collider (LHC)
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What goes on inside the LHC
Stefan Höeche
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What goes on inside the LHC
Stefan Höche
This work makes interpretation ofexperiments at the LHC possible!
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The Higgs Boson and the Fate of the Universe
Depending on the precisevalue of the mass of theHiggs, the universe couldbe in a “false” minimum
PotentialEnergy ofThe Higgs
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Higgs Interferometry and the width of the Higgs
• Almost all Higgs measurements at LHC are of s(i H) x Br(H f) = ci2 . cf2 /GH
• Can’t disentangle Higgs couplings ci , cf from width GH
Dixon, Le 1305.3854
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Higgs Measurements at the LHC and signals for new physics
Cahill-Rowley, Hewett, Rizzo, 1407.7021
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Supersymmetry at the LHC
SUSY discovery could be
‘easy’ at LHC:
Multijets + missing ET
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Discovering Supersymmetry at the LHC
Cahill-Rowley, Hewett, Rizzo 1407.4130
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Light on Dark Matter
•Dark Matter comprises 23% of the universe
•No reason to think Dark Matter should be simpler than the visible universe likely to have many different components
•Dream: Identify one or Dark Matter components and study it in the laboratory
Energy Budget of theUniverse
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The Discovery of Dark Matter
Cahill-Rowley, Hewett, Rizzo 1405.6716
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Galactic Center Excess in Supersymmetry
Extraordinarily difficult to explain GCE in SUSY!!
Many scenarios don’t work:pMSSMDirac gauginosExtended gauge sector
Favored scenario: General NMSSM6 additional parameters:
GCE picks out favored region of parameter spaceMany predictions
Cahill-Rowley, Gainer, Hewett, Rizzo 1409.1573