Trigger efficiencies for GMSB Andrea Bangert Santa Cruz Institute for Particle Physics April 19 th, 2010 1.

Slides:

Advertisements

Similar presentations

SU1 sample 176 k events Athena Full Reconstruction.

Advertisements

Standard Photon ID performance in GMSB susy samples Helen Hayward University of Liverpool.

STAR Status of J/  Trigger Simulations for d+Au Running Trigger Board Meeting Dec5, 2002 MC & TU.

 Trigger for Run 8 Rates, Yields, Backgrounds… Debasish Das Pibero Djawotho Manuel Calderon de la Barca Analysis Meeting BNL October 16, 2007.

Implementation of e-ID based on BDT in Athena EgammaRec Hai-Jun Yang University of Michigan, Ann Arbor (with T. Dai, X. Li, A. Wilson, B. Zhou) US-ATLAS.

Top Physics Validation: Reconstruction, Simulation and Bytestream Paul S Miyagawa The University of Manchester.

Eric TorrenceJanuary Oregon Tau Activities Tau Trigger Efficiency Z→ττ Dijet Fakes Tau Spin Analysis Tau Trigger Activities Validation HLT Monitoring.

1 N. Davidson E/p single hadron energy scale check with minimum bias events Jet Note 8 Meeting 15 th May 2007.

Validation of DC3 fully simulated W→eν samples (NLO, reconstructed in ) Laura Gilbert 01/08/06.

Lots of Plots Andrea Bangert Scipp meeting, March 2 nd, 2010.

Basic Philosophy of SUSY Photons+MET Selection Bruce Schumm, SCIPP/UCSC SUSY 2011 Data Workshop 17 March 2011 n.b.: We are becoming a general photon +

Background studies for GMSB Andrea Bangert Santa Cruz Institute for Particle Physics May 6 th, 2010.

W’  tb  lnubb efficiency VS. electron/muon P T cut muon channel electron channel.

Snapshot of Photon + MET Trigger Studies On behalf of SUSY Photon+MET Group Bruce Schumm, SCIPP/UCSC SUSY Trigger Meeting 14 December 2010.

1 N. Davidson E/p minimum bias update with Athena Analysis Meeting 12 th June 2007.

1 W’  tb  lnubb: the first read. 2 introduction sample: W’  tb  lnubb generator: PYTHIA number of events: 5000 will only use events in the good run.

Hasty Overview of Photon + MET Studies in the Context of GMSB Bruce Schumm Joint SUSY/UED Meeting 23 November 2010.

Increasing Field Integral between Velo and TT S. Blusk Sept 02, 2009 SU Group Meeting.

Single Top Trigger Studies Top Trigger Meeting, 6 June Patrick Ryan, MSU Single Top Trigger Studies Top Trigger Meeting 4 June 2007 Patrick Ryan.

Update from the Photons + MET Group Bruce Schumm UC Santa Cruz / SCIPP 26 August 2010 SUSY/MET Meeting.

1 Andrea Bangert, ATLAS SCT Meeting, Monte Carlo Studies Of Top Quark Pair Production Andrea Bangert, Max Planck Institute of Physics, CSC T6.

First Look at Conversions for Non-Pointing Photons US ATLAS Egamma Meeting March Bruce Schumm, UCSC/SCIPP.

Snapshot of Photon + MET Trigger Studies Bruce Schumm, SCIPP/UCSC SUSY-EtMiss Subgroup Meeting 24 November 2010.

Update from the Photons + MET Group Bruce Schumm UC Santa Cruz / SCIPP 11 March 2010.

1 N. Davidson, E. Barberio E/p single hadron energy scale check with minimum bias event Hadronic Calibration Workshop 26 th -27 th April 2007.

Motivations for a  +MET Trigger EGamma and (separately) MET Trigger Meetings 08 Feb 2011 Bruce Schumm, SCIPP/UCSC, For the SUSY Photon + MET Group.

In order to acquire the full physics potential of the LHC, the ATLAS electromagnetic calorimeter must be able to efficiently identify photons and electrons.

Single Top Trigger Studies Top Trigger Meeting, 9 May Patrick Ryan, MSU Single Top Trigger Studies Top Trigger Meeting 9 May 2007 Patrick Ryan.

Scintillator (semi)DHCAL? Vishnu Zutshi for. Introduction Can a scintillator (semi)digital calorimeter work? Cell sizes are necessarily 6-12 cm 2 Can.

Snapshot of Photon + MET Trigger Studies Bruce Schumm, SCIPP/UCSC SUSY Trigger Meeting 14 December 2010.

Update from the Photons + MET Group Bruce Schumm UC Santa Cruz / SCIPP 26 August 2010 SUSY/MET Meeting.

22. April 2004, New Phenomena MeetingChristian Autermann - Resonant Slepton Production1 Overview R-parity violating Supersymmetry Cross section and Run.

Energy Flow and Jet Calibration Mark Hodgkinson Artemis Meeting 27 September 2007 Contains work by R.Duxfield,P.Hodgson, M.Hodgkinson,D.Tovey.

H->ZZ->4l Update Trying to re-do CSC note: MC Sample Trigger Eff. Electron Selection Eff. Muon Selection Eff.

Z boson mass reconstruction Caroline Steiblin Prof. Al Goshaw Dr. Andrea Bocci Duke University 1.

SUSY with Photons and MET: Introduction and thoughts about Diphoton and Single Photon Analyses Annecy DESY/University of Hamburg Liverpool University Tokyo.

16-Nov-2002Konstantin Beloous1 Digital Hadron Calorimeter Energy Resolution.

First look at non-Gaussian tails with the new Reconstruction Stathes Paganis Univ. of Sheffield LAr-H8 Working Group, 18-Oct-05.

M. Pilar Casado 1 Optimization of Tau Menus: L1 & L2 Trigger & Physics week (19-22 March 2007) M. Pilar Casado (IFAE & UAB) on behalf of the Tau Trigger.

Current Analysis Activity/Results (Only brief overview) Sunil Bansal (Panjab University, Chandigarh) Approved results marked.

Search for High-Mass Resonances in e + e - Jia Liu Madelyne Greene, Lana Muniz, Jane Nachtman Goal for the summer Searching for new particle Z’ --- a massive.

EM resolutions from low to high energy Jan Stark, LPSC Grenoble CAT Force meeting, May 13 th, 2003.

Status and news 1 Z.Liang. MC11 requests According to Joao, MC11 production are almost done According to Joao, MC11 production are almost done There is.

1 Jet Triggers and Dijet Mass Selda Esen and Robert M. Harris Fermilab TTU Weekly HEP Group Meeting Feb 16, 2006.

Study for rejection of muons from p/K decays Sergio Grancagnolo Stefania Spagnolo Andrea Ventura.

Tomas Hreus, Pascal Vanlaer Overview: K0s correction stability tests Jet-pt correction closure test Study of Strangeness Production in Underlying Event.

L1Calo EM Efficiencies Hardeep Bansil University of Birmingham L1Calo Joint Meeting, Stockholm 29/06/2011.

Trigger study on photon slice Yuan Li Feb 27 th, 2009 LPNHE ATLAS group meeting.

Status Update: Search for Low Mass Strings at CMS Andy Yen.

Vertex Reconstruction for High Luminosity pp Running at STAR STAR-Spin luminosity requirements Method of the vertex reconstruction Application to the pileup.

Tomas Hreus, Pascal Vanlaer Study of Strangeness Production in Underlying Event at 7 TeV 1QCD low pT meeting, 18/03/2011.

10 January 2008Neil Collins - University of Birmingham 1 Tau Trigger Performance Neil Collins ATLAS UK Physics Meeting Thursday 10 th January 2008.

Electron Identification Efficiency from Z→ee Maria Fiascaris University of Oxford In collaboration with Tony Weidberg and Lucia di Ciaccio ATLAS UK SM.

Study of missing Level-1 triggers using data10 Hardeep Bansil University of Birmingham Trigger E/Gamma Signature Group Meeting 20/05/2010.

Photon purity measurement on JF17 Di jet sample using Direct photon working Group ntuple Z.Liang (Academia Sinica,TaiWan) 6/24/20161.

Status of GMSB photons analysis Shilei Zang Bernadette Heyburn, Uriel Nauenberg University of Colorado, Boulder SUSYBSM WG3/WG4.

Ultra-peripheral heavy ion results from CMS Michael Murray, DIS2015, 29 th April 2015 CMS: HIN :

David Lange Lawrence Livermore National Laboratory

Royal Holloway Department of Physics Top quark pair cross section measurements in ATLAS Michele Faucci Giannelli On behalf of the ATLAS collaboration.

Τ HLTrigger Optimization Mike B 6 th Nov. 2 M. Bachtis - UW The tau High Level Trigger scheme in CMS For the events that pass the L1 Trigger jet reconstruction.

Monitoring of L1Calo EM Efficiencies

Some introduction Cosmics events can produce energetic jets and missing energy. They need to be discriminated from collision events with true MET and jets.

Effect of t42 algorithm on jets

Efficiency of Muon Reconstruction

Jet Studies 1. Changes in seed finding for cone jets reconstruction

Update of Electron Identification Performance Based on BDTs

Performance of BDTs for Electron Identification

SUSY particles searches with R-parity violation at DØ, Tevatron

Contents First section: pion and proton misidentification probabilities as Loose or Tight Muons. Measurements using Jet-triggered data (from run).

Electron PID & trigger using EMCal

Presentation transcript:

trigger efficiencies for GMSB Andrea Bangert Santa Cruz Institute for Particle Physics April 19 th,

sample and selection cuts sample: GMSB1, sample TeV collisions (mc08) reconstructed in ATLAS-GEO software: svnweb.cern.ch/trac/atlasusr/browser/abangert/diphotonGMSB run in athena selection cuts: MET > 60 GeV H T > 550 GeV, two reconstructed photons p T > 20 GeV eta < 2.5 isEM is tight E T (ΔR < 0.2) / E T < 0.1 2

cut flow number of events remaining after each selection cut no trigger EF_g20_loose requires one photon pT > 20 GeV EF_2g20_loose requires two photons pT > 20 GeV initial efficiency of g20_loose is 97.8% Efficiency after all cuts is 100% initial efficiency of 2g20_loose is 78.5% efficiency after all cuts is 99.6% 3

p T of gravitino vs MET 4 every GMSB1 event produces two neutralini each neutralino decays to produce gravitino and photon (or Z) left: gravitino with highest p T, right: gravitino with lowest p T gravitino with highest p T determines MET subleading gravitino has less impact on MET

p T of gravitino vs p T of photon 5 left: gravitino associated with photon with highest p T right: gravitino associated with subleading photon photon with highest p T is likely to be associated with subleading gravitino gravitino with highest p T is likely to be associated with subleading photon

trigger efficiency as function of photon p T 6 left: 2g20_loose (requires 2 photons), right: g20_loose (requires 1 photon) caveat: no matching was done between true photon from neutralino decay and object which fired trigger one can see how the trigger turns on at p T = 20 GeV

trigger efficiency vs photon pseudorapidity 7 left: 2g20_loose (requires 2 photons), right: g20_loose (requires 1 photon) cut: p T > 20 GeV caveat: no matching was done one can see how the trigger turns on at η = 2.5

trigger efficiency vs MET 8 Large MET indicates high pT for leading gravitino. High p T for leading gravitino indicates lower pT for subleading photon. Is this why efficiency of two photon trigger drops slightly as MET increases?

trigger efficiency vs sum of E T 9 sum of ET weak production strong production sum of E T in calorimeter clusters

conclusion good news EF_g20_loose and EF_2g20_loose almost 100% efficient for events which pass selection cuts no prescale at L = /cm 2 s 2g20 has no prescale at L = /cm 2 s not so good: g20 has prescale of 10 at L = /cm 2 s twiki.cern.ch/twiki/bin/view/Atlas/TriggerPhysicsMenu caveat model represents single point in GMSB phase space goal run over MC09 sample in athena problem trigger configuration dysfunctional in