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Oxford ATLAS SUSY group

Oxford ATLAS SUSY group

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Oxford ATLAS SUSY group

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  1. Oxford ATLAS SUSY group “If it’s there, we’ll find it…” Alan Will Mireia Andree Claire Alex 2 Run-1 papers submitted 7 conference notes 5 analyses in progress Upgrade performance Upgrade physics studies James(joint with TH) Chris(now CERN fellow)

  2. ATLAS SUSY publications ATLAS Supersymmetry public results page:First two Run-I PAPERs both Oxford led First SUSY search with Higgs boson Oxford led

  3. Oxford-led papers since Oct 2012 • arXiv:1308.1841 / CERN-PH-EP-2013-110 / submitted to JHEP, “Search for new phenomena in final states with large jet multiplicities and missing transverse momentum at √s = 8 TeV proton-proton collisions using the ATLAS experiment” • The first ATLAS run-1 SUSY paper • Innovative search in very high jet multiplicity final states • Very sensitive to squark/gluino production and cascade decays. • arXiv:1308.2631 / CERN-PH-EP-2013-119 / submitted to JHEP, “Search for direct third-generation squarkpair production in final states with missing transverse momentum and two b-jets in sqrt{s}=8 TeVpp collisions with the ATLAS detector” • The second ATLAS run-1 SUSY paper • World-leading sensitivity to sbottomsquarks • Interpretations for stop squarks and near-degenerate squarks

  4. arXiv:1308.1841 SUSY multi-jet + pTmiss • Novel method proposed by Chris Young • Analysis led by Mireia Cripsin Ortuzar • Papers edited by Chris Young & Alan Barr • World-leading sensitivity to (esp. stop) squarks and gluinos in cascade decays • Run-1 paper completed

  5. arXiv:1308.2631 SUSY sbottom searches • Sbottomsquark plays special role on SUSY • Search led by Alex Dafinca with Will Kalderon • Different signal regions target different mass heirarchies (e.g. ISR) • World-leading sensitivity to sbottomsquarks • Turns out also to be rather sensitive to stop squarks • Run-I paper completed

  6. ATLAS-CONF-2013-093 SUSY Gaugino + Higgs searches • First search to look for Higgs in SUSY cascade decays • Dedicated b-tagging performance studies • Statistically limited, but providing first constraints • Run-I CONF note completed  paper

  7. Current activities • Run-I papers • Leading new scharm analysis • Leading new sbottom + Higgs search • Initiated & active on new pMSSM summary & interpretations paper • Initiated & active on new Standard Model multi-jet (unfolded) papers • New NMSSM pheno/interpretations analysis • Run-II preparation • MET performance – Oxford-led • B-tagging performance • Physics capabilities – major Oxford input

  8. SUSY scharm searches • New analysis initiated • Unique search aimed specifically at second generation squarks • Selection based on sbottom case • Charm-tagging based on neural network • Complimentary to ATLAS stop  charm + LSPsearch Plots not public

  9. CONF notes since Oct 2012 • ATLAS-CONF-2012-165, "Search for direct sbottom pair production in events with missing transverse momentum and two b-jets in 12.8/fb of pp collisions at √s= 8 TeV with the ATLAS detector“ • ATLAS-CONF-2013-001, "Search for direct stop production in events with missing transverse momentum and two b-jets using 12.8/fb of pp collisions at √s= 8 TeV with the ATLAS detector" • ATLAS-CONF-2013-053, “Search for direct third generation squarkpair production in final states with missing transverse momentum and two b-jets in √s = 8 TeVpp collisions with the ATLAS detector”, May 2013 • ATLAS-CONF-2013-054: “Search for new phenomena using final states with large jet multiplicities and missing transverse momentum with ATLAS in 20/fb at sqrt(s) = 8 TeV” • ATLAS-CONF-2013-093, “Search for chargino and neutralinoproduction in final states with one lepton, two b-jets consistent with a Higgs boson, and missing transverse momentum with the ATLAS detector in 20.3/fbof √s = 8 TeVppcollisions” • ATLAS-COM-CONF-2012-205: "Search for direct stop production in events with missing transverse momentum and two b-jets using 12.8/fb of pp collisions at sqrt{s} = 8 TeV with the ATLAS detector", Dec 2012

  10. COM/INT notes since Oct 2012 • ATL-COM-PHYS-2012-1458: “Searches for Supersymmetry at the high luminosity LHC with the ATLAS Detector” • ATL-COM-PHYS-2012-1505: "Search for sbottom pair production in final states with Missing Transverse Energy and 2 b-jets”, Oct 2012 • ATL-COM-PHYS-2012-1762: "Search for sbottom pair production in final states with Missing Transverse Energy and 2 b-jets (with stop reinterpretation)", Dec 2012 • ATL-COM-PHYS-2012-1814: “Quest for new phenomena using large jet multiplicities and missing transverse momentum with ATLAS in 20.3/fb of 8 TeV proton-proton collisions : Supporting documentation” • ATL-COM-PHYS-2013-072: "Search for direct sbottom or stop pair production in final states with Missing Transverse Energy and two b-jets", Jan 2013 • ATL-COM-PHYS-2013-140: “Search for new phenomena in final states with large jet multiplicities and missing transverse momentum at s√=8TeV proton-proton collisions using the ATLAS experiment” • ATL-COM-PHYS-2013-348: “Search for weak gaugino production in final states with one lepton, two b-jets consistent with a Higgs boson, and missing transverse momentum with the ATLAS detector in 20.3/fbof sqrt(s) = 8 TeVpp collisions” • ATL-COM-PHYS-2013-479: "Search for direct third generation squarkpair production in final states with Missing Transverse Momentum and two b-jets in s√=8 TeVpp collisions with the ATLAS detector" • ATL-COM-PHYS-2013-1012: “Jet and Missing ET Performance at High Luminosity” • ATL-COM-PHYS-2013-1343: “Performance assumptions based on full simulation for an upgraded ATLAS detector at a High-Luminosity LHC”, Sept 2013

  11. Conference/Workshop talks/posters • EPS 2013, Stockholm • NORDITA 2013, Stockholm • Kruger 2012, South Africa • Hadronic calibration workshop, Chicago, 2013 • BOOST-2013, Flagstaff, Arizona • ATLAS SUSY Workshop, Amsterdam, 2013