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4 th TOPLHCWG open meeting Introduction

4 th TOPLHCWG open meeting Introduction. Roberto Chierici (Lyon) Markus Cristinziani (Bonn) Michelangelo Mangano (CERN) CERN, 28 th - 29 th November 2013. Introduction and coordinates. Fourth open session of the TOPLHCWG

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4 th TOPLHCWG open meeting Introduction

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  1. 4th TOPLHCWGopen meetingIntroduction Roberto Chierici (Lyon) Markus Cristinziani (Bonn) Michelangelo Mangano (CERN) CERN, 28th - 29th November 2013

  2. Introductionandcoordinates • Fourthopen sessionoftheTOPLHCWG • forumforpublicdiscussions (ATLAS+CMS+TH) on combinationandinterpretationof top physicsmeasurementsattheLHC • twoopen sessions per year, topicalmeetings in between • Documentationandcoordinates • integratedintothe LPCC structureat CERN • agendasavailableat • https://indico.cern.ch/categoryDisplay.py?categId=4463 • Twikipageavailableat • http://lpcc.web.cern.ch/LPCC/index.php?page=top_wg • publicnotesproduced so far also availablefromthatpage • ifinterestedsubscribetolhc-toplhcwg@cern.ch • Welcome ! TOPLHCWG - Introduction

  3. Combinations: results • ShownatEPS thissummer (seetalk) • Twonewcombinationsreleasedfor TOP2013 single top t-channel (8 TeV) • ATLAS-CONF-2013-098 • CMS PAS TOP-12-002 top quarkmass, updatedto Fall 2013 measurements • ATLAS-CONF-2013-102 • CMS PAS TOP-13-005 TOPLHCWG - Introduction

  4. Activities • Combinations • currentlyfiveefforts: mt, σ(t), σ(tt̄), W helicity, asymmetry • Harmonisationofsystematicuncertainties • detector-related: JES, flavour-tagging • modeling: radiation, generator, b-fragmentation • Review ofcombinationtools • usage/implementations of BLUE • beyond linear approximation • Theory-experiment discussions • besttoolsforsingle top and top quark pair production • definehowtobestpresentresults TOPLHCWG - Introduction

  5. New combinationefforts • tt̄ chargedasymmetry • efforthasstartedtocombine 7 TeV measurements • contacts: Frédéric Deliot (ATLAS), Thorsten Chwalek (CMS) • firstreporttoday • ... • morediscussionstomorrow TOPLHCWG - Introduction

  6. Agenda: today Single top Charge asymmetry Cross section BLUE & Tools TOPLHCWG - Introduction

  7. Agenda: tomorrow • Quitesome time foreseenfordiscussions! Top mass Q & A b-fragmentation Outlook TOPLHCWG - Introduction

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