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Brad Abbott

Brad Abbott. DOE Review University of Oklahoma Nov 6, 2014. Program. Scarlet Norberg : (Graduated Oct 2014) ATLAS Inclusive Photon Cross Section (Dissertation) SUSY lepton+ g +MET David Bertsche : (Resident at CERN) ATLAS Optobox W+prompt J/ y

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Brad Abbott

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  1. Brad Abbott DOE Review University of Oklahoma Nov 6, 2014

  2. Program • Scarlet Norberg: (Graduated Oct 2014) ATLAS • Inclusive Photon Cross Section (Dissertation) • SUSY lepton+g+MET • David Bertsche :(Resident at CERN) ATLAS • Optobox • W+prompt J/y • OthmaneRifki: (Argonne graduate fellow) ATLAS • RoiB • SUSY • D0 J/y + X, Zb(10610) and Zb(10650) search

  3. Reach of Analysis Scarlet Norberg • MEASUREMENT OF THE INCLUSIVE ISOLATED PROMPT PHOTON CROSS SECTION AT = 7 TeV WITH THE ATLAS DETECTOR • First inclusive photon cross section measurement to reach 1 TeV.

  4. Differential Cross Section in ET • Isolation: 7 GeV. Cone size of .4 • Kinematic regions: • 100 GeV<Pt<1000 GeV • |η (γ)|<1.37 • The agreement between NLO calculations in data are good especially at higher pT. • The agreement for LO MC • PYTHIA is good • HERWIG underestimates • Entering the regime where PDF (gluon) uncertainties are large (pT>700 GeV)! Published Phys. Rev. D 89, 052004 – Published 24 March 2014 PDF uncertainties dominate

  5. Differential Cross Section in ET Forward Region • The agreement between NLO calculations and data are good especially at higher ET. • PYTHIA has better agreement than HERWIG • Large theoretical uncertainties • (~40% at large pT)

  6. 8 TeV SUSY analysis Scarlet Norberg • Using General Gauge Mediation model for both strong and weak production. • Searching for events with a high energy photon, lepton (e or m) and large MET • Using 20.3 fb-1 of 8 TeV dataset • Optimization complete • Control regions defined • Hoping to unblind soon

  7. D. Bertsche IBL Detector: Optobox Custom mini-crate for housing optical modules Need to ensure proper shielding, grounding, cooling, high reliability and environmental tolerance 14 optoboxes have been installed in ATLAS

  8. D. Bertsche W+Prompt J/y

  9. OthmaneRifki The Region of Interest Builder (RoIB) is an integral part of the ATLAS detector Trigger and Data Acquisition (TDAQ) chain where the coordinates of the region of interests identified by the first level trigger (L1) are collected and passed to the High Level Trigger (HLT) to make a decision. ATLAS TDAQ in Run 2 RoIB RoIB is the first unit that sees the L1 output and makes it available for the rest of the TDAQ system. Every event recorded by ATLAS passes through the RoIB.

  10. RoIB Evolution • Goals: • Absorb the RoIB function in the HLT Supervisor (HLTSV). • Replace the custom made VME bus system of the RoIB • with the RobinNP input PCIe card in the HLTSV. • Achieve more than 100 KHz readout rate. • Tasks: • Test the input/output bandwidth limitation of the • RobinNP using a high performance processor. • Test the performance of the HLTSV after the installation • of the new RobinNP input cards in the HLTSV.

  11. Results Emulation Mode with 12 channels Emulation Mode with 100 word fragments Rate (KHz) Rate (KHz) Fragment size (words) Number of channels We are able to achieve 100 KHz readout for a fragment of 50 words, the expected size of an RoIB fragment, with 12 channels readout in the internal generation mode of the RobinNP.

  12. OthmaneRifki Search for strongly produced SUSY • Run 1: 8 TeV @ 20.3 fb-1arxiv:1404.2500Exclusion limits on 14 SUSY models and one mUED • Final states: • Multiple energetic jets + 2 isolated same sign leptons (electron or muon but no flavor requirement) • Multiple energetic jets + 3 isolated leptons • Backgrounds: VV, ttV, ttH, tZ, tttt, VVV+jets, hadrons mis-identified as leptons, leptons from heavy-flavor decays, electron from photon conversions, electron charge mis-measurement. (V = W,Z)

  13. Search for strongly produced SUSY • Expected sensitivity in run II for gluinos:

  14. D0 X/Y(4140) March 2009 CDF reports evidence of a narrow peak in J/y f spectrum in B+ J/yf K+ decays PRL 102 242002 (2009) August 2009: Search by Belle in same channel finds no signal. Limit set on production rate cannot exclude CDF result arXiv:0910.3138 December 2009: Belle searches for direct production ggJ/y f. Allowed if JPC=0++ or 2++ . No signal found PRL 104 112004 (2010) January 2011: CDF updates analysis with larger data set observes X(4140) with 5 s arXiv:1101.6058 February 2012 LHCb search in B+ J/yf K+decays see No evidence PRD 091103(R) (2012)

  15. Latest results D0 finds evidence at > 3 s in same decay mode as CDF/LHCb Significance > 5 s Published: Phys Rev D 89, 012004 (2014)

  16. Zb search Belle reports peaks in p± Ups(1S,2S,3S) arXiv:1105.4583 Zb1(10608) and Zb2(10650) If real, must be exotic states or possibly kinematic effect (CUSP) Preliminary Preliminary

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