1 ttbar events with Atlantis   A lot of jets in this event !   Bjets (1 and 2) close in phi   Muon from semilep decay of b-jet1   Tau jet   Pb.

Slides:

Advertisements

Similar presentations

SU1 sample 176 k events Athena Full Reconstruction.

Advertisements

ATLAS Overview Stan Thompson ~22 m ~44m. Inner Detector.

1 ttbar events with Atlantis   Tops back to back in the transverse plane, but objects in the barrel apart from c-jet (Extended tile)   Big activity.

B-tagging, leptons and missing energy in ATLAS after first data Ivo van Vulpen (Nikhef) on behalf of the ATLAS collaboration.

CMS reconstruction and identification Part II CMS reconstruction and identification Part II A. Nikitenko Tau jetsTau jets Missing E T (briefly)Missing.

1 B-tagging meeting overview Li bo Shandong University.

1 The Topologies For a B decay to a single cascade charm D B IP lB lB lD lD ZVTOP vertex found furthest from IP contains the cleanest set of true B,D tracks.

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

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

1 Study of Top-Antitop Production with the ATLAS Detector at the LHC DPG Frühjahrstagung, A. Bangert, T. Barillari, S. Bethke, N. Ghodbane, T.

Top Turns Ten March 2 nd, Measurement of the Top Quark Mass The Low Bias Template Method using Lepton + jets events Kevin Black, Meenakshi Narain.

1 Annual Report Zongru Wan Rutgers  Proton/antiproton collisions at Fermilab  CDF detector  Tau’s - physics, decay and reconstruction  Exercise: tau.

Kevin Black Meenakshi Narain Boston University

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

Experimental aspects of top quark physics Lecture #1 Regina Demina University of Rochester Topical Seminar on Frontier of Particle Physics Beijing, China.

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.

1 introduction sample: W’  tb  Wbb  eνbb/μνbb generator: PYTHIA five samples with W’ mass: 300GeV, 500GeV, 1000GeV, 1500GeV, 2000GeV number of events.

Top Mass Measurement at the Tevatron HEP2005 Europhysics Conference Lisboa, Portugal, June 22, 2005 Koji Sato (Univ. of Tsukuba) for CDF and D0 Collaborations.

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

Fabiola Gianotti, Physics at LHC, Pisa, April 2002 PART 2.

1 Physics Impact of Detector Performance Tim Barklow SLAC March 18, 2005.

1 Top Quark Pair Production at Tevatron and LHC Andrea Bangert, Young Scientist Workshop, , Ringberg Castle.

Ttbar jets E T >30 GeV, ||20 GeV, ||

Status of the OPERA experiment Yoshiaki Nonoyama Nagoya Univ.

Ttbar jets E T >30 GeV, ||30 GeV, ||

Tau Jet Identification in Charged Higgs Search Monoranjan Guchait TIFR, Mumbai India-CMS collaboration meeting th March,2009 University of Delhi.

24/11/2014MAUS Status, A. Dobbs, MPB Talk2 24/11/2014MAUS Status, A. Dobbs, MPB Talk3 CKOV – Threshold Cherenkov detectors (aerogel) TOF – Three Time.

The Discovery of the Top Quark By Ben Smith. Introduction  By 1977, the discovery of the bottom quark suggested the presence of its isospin partner,

1 A Preliminary Model Independent Study of the Reaction pp  qqWW  qq ℓ qq at CMS  Gianluca CERMINARA (SUMMER STUDENT)  MUON group.

LHC Olympics Yeong Gyun Kim (KAIST)

LHC Olympics Yeong Gyun Kim.

Lepton efficiency & fake rate Yousuke Kataoka University of Tokyo Content definitions of leptons p2 efficiency and fake rate for SU3 ( ) p3, p4.

1 Top Quark Pair Production at Tevatron and LHC Andrea Bangert, Herbstschule fuer Hochenergiephysik, Maria Laach, September 2007.

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

August 30, 2006 CAT physics meeting Calibration of b-tagging at Tevatron 1. A Secondary Vertex Tagger 2. Primary and secondary vertex reconstruction 3.

F. Ahmadov Joint Institute for Nuclear Research, Dubna, Russia Institute of Physics, ANAS, Baku, Azerbaijan 41th ITEP Winter School of Physics February.

Detecting & observing particles

Update on Mistag in 5GeV Single γ Events Elizabeth Brost, Jim Brau, and Chaowaroj Wanotayaroj SiD PFA Meeting 8/18/

B-Tagging Algorithms for CMS Physics

Prospects for B  hh at LHCb Eduardo Rodrigues On behalf of the LHCb Collaboration CKM2008 Workshop, Rome, 9-13 September 2008 LHCb.

Benchmarking SiD Andrei Nomerotski, Univ.of Oxford SiD meeting in Paris, 11 Feb 2008.

30/Jul/20101 Research of Z generation Ken-ichiro KOIKE.

INCLUSIVE STANDARD MODEL HIGGS SEARCHES HIGGS SEARCHES WITH ATLAS Francesco Polci LAL Orsay On behalf of the ATLAS collaboration. SUSY08 – Seoul (Korea)

1 Single top in e+jets channel Outline : - Data and MC samples - Overview of the analysis - Loose and topological cuts - MC efficiencies and expected number.

Tth study Lepton ID with BDT 2015/02/27 Yuji Sudo Kyushu University 1.

Chunhui Chen, University of Pennsylvania 1 Heavy Flavor Production and Cross Sections at the Tevatron Heavy Flavor Production and Cross Sections at the.

Taikan Suehara, ILC physics mini-workshop, 2009/01/21 page 1 SUSY and Tau-pair analysis with full simulation in ILD detector model Taikan Suehara ICEPP,

Update on WH to 3 lepton Analysis And Electron Trigger Efficiencies with Tag And Probe Nishu 1, Suman B. Beri 1, Guillelmo Gomez Ceballos 2 1 Panjab University,

By Henry Brown Henry Brown, LHCb, IOP 10/04/13 1.

B. Resende Top WG 28/10/05 Polarization studies in ttbar events 1 Polarization studies in tt events with full simulation 1.Physics motivations 2.Full simulation.

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.

Susan Burke DØ/University of Arizona DPF 2006 Measurement of the top pair production cross section at DØ using dilepton and lepton + track events Susan.

1 Studies of Heavy Flavour Jet Tagging with ZVTOP in JAS3 Overview Jet flavour tagging in JAS3 Cosθ dependence Primary vertex momentum Use of neutral energy.

Summary of Commissioning Studies Top Physics Group M. Cobal, University of Udine Top Working Group, CERN October 29 th, 2003.

1 Experimental Particle Physics PHYS6011 Fergus Wilson, RAL 1.Introduction & Accelerators 2.Particle Interactions and Detectors (2) 3.Collider Experiments.

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

1 Study of Top-Antitop Production with the ATLAS Detector at the LHC DPG Frühjahrstagung, Andrea Bangert, Siegfried Bethke, Nabil Ghodbane, Tobias.

Marcel Vreeswijk (Nikhef/UvA-IoP) First Results of ATLAS at the LHC -- The rediscovery of the Standard Model-- Contents: Intro: The Standard Model Elementairy.

Marcello Barisonzi First results of AOD analysis on t-channel Single Top DAD 30/05/2005 Page 1 AOD on Single Top Marcello Barisonzi.

G. Sullivan – Quarknet, July 2003 Calorimeters in Particle Physics What do they do? –Measure the ENERGY of particles Electromagnetic Energy –Electrons,

David Lange Lawrence Livermore National Laboratory

B Tagging Efficiency and Mistag Rate Measurement in ATLAS

Atlantis and the Inner Detector

Top Quark Production at the Large Hadron Collider

Jessica Leonard Oct. 23, 2006 Physics 835

Experimental Particle Physics PHYS6011 Putting it all together Lecture 4 6th May 2009 Fergus Wilson, RAL.

UNDERSTANDING MET IN THE FIRST ATLAS DATA

Experimental Particle Physics PHYS6011 Putting it all together Lecture 4 28th April 2008 Fergus Wilson. RAL.

Experimental Particle Physics PHYS6011 Joel Goldstein, RAL

Susan Burke, University of Arizona

Presentation transcript:

1 ttbar events with Atlantis   A lot of jets in this event !   Bjets (1 and 2) close in phi   Muon from semilep decay of b-jet1   Tau jet   Pb 1: Muon ID track bad  -z view   Ex: tt  Wb Wb  udb   b (Evt #7 in first file of #5200 with ) E (GeV) p T (GeV)  (deg) u d b b    p T miss j2j1  from j1 u j1 d p T miss u jet d jet  j2  j1 d jetu jet   from j1

2 Primary vertex X-Y plane p T > 5 GeV   Transverse plane: Primary vertex displaced by 20  m, precision ± 15  m   z: Primary vertex displaced by 9cm, precision ± 100  m   Pb: 8 particles (6 , 1  Proton) originated from the MC vertex. FSR from jets? Reconstructed tracks Monte Carlo tracks p K p K Detector center Rec. vertex Monte Carlo vertex Rec. vertex Detector center  -Z plane p T > 5 GeV Monte Carlo vertex X y 25  m 1 cm ρ z             E (GeV) p T (GeV)  (deg) u d b b  

3 B tagging X-Y pT > 2 GeV X-Y (j1,j2) pT > 5 GeV Detector center j2 j1   Bjets with large IP   But hard reconstruction because of activity … u jet 20 mm Rec. vertex Monte Carlo vertex j1 j2 Detector center Reconstructed tracks Monte Carlo tracks 4 mm SV1+IP3D b-jet b-jet 25.8 d jet  jet 15 mm Monte Carlo vertex E (GeV) p T (GeV)  (deg) u d b b  

4 Jets in calorimeters   tt  Wb Wb  udb   b (Evt #7 in first file of #5200 with ) b1 b2 E rec (GeV)  rec  rec (deg) b-jet d-jet b-jet 2+u E (GeV) p T (GeV)  (deg) u d b b   u  d    A lot of jets in this event !   u-jet and b-jet2 are to close to be distinguished, even with cone 0.4 Jet circle  R=0.4