1. SUSY searches 11 papers completed Completely solves hierarchy problem
Predicts an elementary higgs scalar
…with a SM-like limit
…below 135 GeV
Naturalness predicts “light” Higgsino, stop, gluino
Staff: Alan Barr, Claire Gwenlan, Koichi Nagai, new PDRA Students: Will Kalderon, Will Fawcett, Jonathan Burr, Jesse Liu*, Mike Nelson
*Jointly supervised with Oxford Theoretical physics
Multijet search
Scharm search
Run-1 highlights:
Inclusive squark/gluino searches
Targeted gluino/stop searches
Direct sbottom search
Direct scharm search
11 papers completed
7 CONF notes completed
First ever direct search for scharm squarks (PRL)
“SUSY” searches seek new particles decaying to invisibles
Also sensitive to Extra Dimensions models, leptoquarks, …

2. JHEP 10 (2015) 134
arXiv:

3. Spectra σSI σSD Stops Sbottoms Sleptons H/A hbb h inv
Gluinos
Animation: before and after ATLAS Run-1
Number of models vs dark matter relic density and LSP mass)
Spectra
σSI
σSD
Fraction of pMSSM models excluded as a function of sparticle masses
Stops
Sbottoms
Sleptons
H/A
hbb
h inv
SUSY , arXiv:
Very many interesting results: just a few examples here

4. Weak Run-1 limits on EW production
charginos
selectrons
staus
Small fraction of models excluded so far
Increase in Lumi helps
Shift effort here in Run 2
New PDRA targets these

5. Preparations for Run-2 140 researchers gather at St Catz
Plan Dark Matter & SUSY search strategy for LHC Run 2
St Catherine’s College, Oxford

6. Selected Pheno papers

7. SUSY: Our Run-2 results so far
Optimised for discovery
≥7 to ≥10 jets
≥0, ≥1, ≥2 b-jets
High MET significance
Run-1 exclusion
ATLAS-CONF
Preliminary result for EOYE, December 2015 Paper in preparation
Generally good agreement with SM
Unique sensitivity to long decay chains
Oxford initiated and led analysis with input from ex-Oxford student at CERN

8. Oxford-proposed and led the ATLAS Run-1 Summary
Overall summary of 22 different ATLAS Run-1 search papers
Oxford-proposed and led the ATLAS Run-1 Summary
Inclusive
3rd generation
Electroweak
Other
Interpreted in the general [19-parameter] pMSSM
“phenomenological” MSSM
R-parity conserving
Neutralino LSP
Allow Sparticle masses up to 4 TeV
500 million models sampled
Apply prior experimental constraints:
EW precision measurements
Mass bounds e.g. from LEP, Tevatron
ΩLSP < ΩPlanck
Consider carefully the remainder
310,327 : models before Run-1
30 billion : signal events simulated
44,559 : models required full simulation
600 million : signal events thru GEANT
Present exclusion (fraction of models) in 2D or 1D projections
Link to PLOTS (ATLAS url) and arXiv number (and hyperlink) to be added when public