0.357 0.652 1.221 ~0 Unknown Unknown 4 Whats wrong with the Standard Model? It fails to explain:
Neutrino masses and mixing angles Baryogenesis Dark Matter Dark Energy 5
SUSY (SUperSYmmetry) Standard way beyond the Standard Model - Altarelli & Feruglio Spacetime symmetry (square root of a translation) Stable theory from Mweak (103 GeV) to MGUT (1016 GeV) New superpartner particles MSSM (Minimal Supersymmetric SM) is the simplest SUSY extension to SM
6 MSSM (Minimal Supersymmetric SM) Construct Lagrangian that changes only by total derivative under SUSY (action is invariant) Add all soft SUSY breaking terms
Same physics at UV, symm. broken in IR Minimal extension has 124 parameters instead of 19 now! 7 More SUSY models mSUGRA (minimal SUperGRAvity) 5 basic parameters (m0, m1/2, A0, tan, sign()) determine phenomenology at LHC scale
GMSB (Gauge-Mediated Symmetry Breaking) AMSB (Anomaly-Mediated Symmetry Breaking) etc. 8 Mass Spectra under mSUGRA Note that all scalar masses converge and all
spin 1/2 masses converge 9 Superpartners Each SM particle has a superpartner New conserved charge/quantum number Naming conventions for sparticles: Fermions: prepend with s, e.g. squark
Bosons: add -ino suffix, e.g. gluino Spin = Spin 1/2 10 List of sparticles
11 Where are the sparticles? Produced at higher energy scales than previous colliders have achieved Lightest Supersymmetric Particle (LSP) is stable and must be weakly interacting mSUGRA: bino/wino/higgsino/gravitino? GMBS: gravitino AMSB: wino
It would be a strong candidate for Dark Matter WIMP 12 LSP (Lightest Supersymmetric Particle) If LSP is weakly interacting, how can we
produce and observe such particles? Indirectly! Higher energy sparticles need not be weakly interacting They can be produced in sparticle/antisparticle pairs and decay to LSP LSP is observed indirectly as an MET signature 13 SUSY Events We always expect MET from LSPs The other particles produced in the
sparticle decays may hadrons, leptons, etc. Events generally classified based on the number of leptons produced 14 SUSY Candidate Event QuickTime and a TIFF (Uncompressed) decompressor
are needed to see this picture. M. Spiropulu [Eur. Phys. J. C (2009) 59: 445462] 15 Gluino Pair Production 16 Squark Pair Production
17 Squark-Gluino Associated Production 18 Sparticle Production CrossSections
and dominate SUSY signatures at LHC if 1 TeV 19 Sparticle Production Tevatron LHC
20 Gluino Decay Modes 21 Squark Decay Modes 22
Gluino Decays 23 Particle Cascade Decays Ultimately, we expect something more like this Run MC simulations (ISAJET, PYTHIA) for
multiple points in parameter space and try to match the LHC data 24 Sample LHC SUSY Event Source:
Baer 25 Meff = MET + E(jet1) + E(jet2) + + E(jet ) n Rough Estimate of
squark/gluino masses from Meff ATLAS TDR (F. Paige) 26 Missing MET & HT distributions
QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. M. Spiropulu [Eur. Phys. J. C (2009) 59: 445462] 27 Dijet Event Search @ CMS Works best in parameter space squarks have large branching
decay to LSP QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. 28 Dijet Event Process 2 jets + MET
Search for events with exactly two jets above certain threshold Require minimum MET 29 Dijet Background QCD dijet events (MET due to mismeasurement, cracks, etc.) Z + Jet (Z)
30 Dijet Event Preselection Cuts QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. 31
Dijet Event - cut < 2/3 cuts out almost the entire QCD backgroun d QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture.
CMS Collaboration [CMS PAS SUS-08005] 32 New variables for cuts: , T 33 Dijet Event Search
QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. CMS Collaboration [CMS PAS SUS-08005] 34 The additional cuts Meff > 500 GeV < 2/3
or T > 0.55 35 Dijet Event Search QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. CMS Collaboration [CMS PAS SUS-08005]
36 Prospects for the LHC Center-of-mass energy = 14 TeV Should be able to produce sparticles at a rate high enough to determine signal over background We may see sparticles for the first time! 37
LHC Reach vs. earlier experiments Baer, Belyaev, Krupovnickas, Tata: JHEP 0402, 007 (2004) 38 Reach of LHC at 100-1 fb
Baer, Balasz, Belyaev, Krupovnickas, Tata: JHEP 0306, 054 (2003) 39 Reach of CMS for various Integrated Luminosities Were maybe just a couple of years
from seeing evidence of SUSY! 40 Conclusion If SUSY exists and squarks and gluinos have a mass under 3 TeV, then we should be able to see evidence within of few years of taking data at the LHC
If they have a mass of about 1 TeV, then we should see them much sooner, possibly in the dijet signature 41
Addenbrookes & Rosie eHospital Go-Live & Benefits Realisation. Introduction. Background. Go-live . Workflow consideration. The future. ... MyChart, External PO. Work with EPIC to implement large system updates to improve functionality for CUHFT staff.
Phi Delta Kappa International Thank you for Joining PDK! Phi Delta Kappa International Welcome to PDK! Introduction PDK is an education association, professional in nature. Since 1906, PDK has played an influential role in education. Members are united in the...
Post Real-Time. DAM. RUC. RUC. Hour-Ahead. Operating Hour (RTM) Settlement. Reporting. Performance Monitoring. The SASM process goes away, and the RUC process will be used to ensure sufficient capacity is available to meet demand and minimum AS requirements for the...
Practise the sounds your child brings home in their blue book. Learn the action together and practise forming each letter correctly. Practise the high frequency words in your child's wallet. In the car, play games. I can see a sh-ee-p....
Contact: [email protected] Beacon Programs Wanda Ascherl ... recognizes, embraces, and appropriately responds to the cultural characteristics of a diverse population. Interventions would be directed toward managerial, supervisory, and frontline program staff. ... presentation and attendance ...