Missing Transverse Energy Calibration in W/Z(+jets) Events

Slides:

Advertisements

Similar presentations

1 Data Analysis II Beate Heinemann UC Berkeley and Lawrence Berkeley National Laboratory Hadron Collider Physics Summer School, Fermilab, August 2008.

Advertisements

Physique des particules élémentaires – aspects expérimentaux Suive/complémente le PHYS 2263 (d) La référence de base: D.H. Perkins Introduction to High.

Search for Supersymmetry with early LHC data David Stuart, UC, Santa Barbara. May 12, 2010.

Fourth Generation Leptons Linda Carpenter UC Irvine Dec 2010.

Missing E T Reconstruction in the ATLAS Calorimeter Calor 2006, Chicago June 5th - 9th, 2006 For the ATLAS Jet/E T Miss Group Ambreesh Gupta, University.

Chris Hays Duke University TEV4LHC Workshop Fermilab 2004 W Mass Measurement at the Tevatron CDF DØDØ.

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

Recent Electroweak Results from the Tevatron Weak Interactions and Neutrinos Workshop Delphi, Greece, 6-11 June, 2005 Dhiman Chakraborty Northern Illinois.

Susy05, Durham 21 st July1 Split SUSY at Colliders Peter Richardson Durham University Work done in collaboration with W. Kilian, T. Plehn and E. Schmidt,

1 Hadronic In-Situ Calibration of the ATLAS Detector N. Davidson The University of Melbourne.

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

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.

A simulation study of the rapidity distributions of leptons from W boson decays at ATLAS Laura Gilbert.

Calorimeter Calibration and Jet Energy Scale Jean-Francois Arguin November 28 th, 2005 Physics 252B, UC Davis.

Introduction to Hadronic Final State Reconstruction in Collider Experiments Brief Introduction to Missing Transverse Energy Reconstruction at LHC Peter.

Paris 22/4 UED Albert De Roeck (CERN) 1 Identifying Universal Extra Dimensions at CLIC  Minimal UED model  CLIC experimentation  UED signals & Measurements.

Data-based background predictions using forward events Victor Pavlunin and David Stuart University of California Santa Barbara July 10, 2008.

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

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

W properties AT CDF J. E. Garcia INFN Pisa. Outline Corfu Summer Institute Corfu Summer Institute September 10 th 2 1.CDF detector 2.W cross section measurements.

Analysis Plans for Jets + EtMiss Signatures Pierre Savard ATLAS Toronto Group Meeting January

1 Realistic top Quark Reconstruction for Vertex Detector Optimisation Talini Pinto Jayawardena (RAL) Kristian Harder (RAL) LCFI Collaboration Meeting 23/09/08.

W+jets and Z+jets studies at CMS Christopher S. Rogan, California Institute of Technology - HCP Evian-les-Bains Analysis Strategy Analysis Overview:

A few slides to summarise what Alessandro and I were up to for March 24th video meeting Taking for granted that W+/- are good measurements to make- are.

Study of the to Dilepton Channel with the Total Transverse Energy Kinematic Variable Athens, April 17 th 2003 Victoria Giakoumopoulou University of Athens,

Commissioning Studies Top Physics Group M. Cobal – University of Udine ATLAS Week, Prague, Sep 2003.

1 A.Nomerotski SUSY Benchmarking Analyses with SiD Yiming Li, Tomas Lastovicka, Andrei Nomerotski (University of Oxford) TILC09, Tsukuba, 18 April 2009.

First ideas of physics concepts for the LHC masterclass measurements Michael Kobel Konrad Jende q qq.

Study of Standard Model Backgrounds for SUSY search with ATLAS detector Takayuki Sasaki, University of Tokyo.

B-Tagging Algorithms for CMS Physics

Data-based background predictions for new particle searches at the LHC David Stuart Univ. of California, Santa Barbara Texas A&M Seminar March 24, 2010.

QCD Background Estimation From Data Rob Duxfield, Dan Tovey University of Sheffield.

October 2011 David Toback, Texas A&M University Research Topics Seminar1 David Toback Texas A&M University For the CDF Collaboration CIPANP, June 2012.

1 Measurement of the Mass of the Top Quark in Dilepton Channels at DØ Jeff Temple University of Arizona for the DØ collaboration DPF 2006.

Régis Lefèvre (LPC Clermont-Ferrand - France)ATLAS Physics Workshop - Lund - September 2001 In situ jet energy calibration General considerations The different.

EPS Manchester Daniela Bortoletto Associated Production for the Standard Model Higgs at CDF D. Bortoletto Purdue University Outline: Higgs at the.

1 Reinhard Schwienhorst, MSU Top Group Meeting W' Search in the single top quark channel Reinhard Schwienhorst Michigan State University Top Group Meeting,

Ellie Dobson Z→ee and missing Et resolution In collaboration with Paul Prichard (Liverpool), Tony Weidberg (Oxford) Files produced.

V. Pozdnyakov Direct photon and photon-jet measurement capability of the ATLAS experiment at the LHC Valery Pozdnyakov (JINR, Dubna) on behalf of the HI.

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

On behalf of the ATLAS MET group Ellie Dobson Missing transverse energy (MET) performance in ATLAS Combined performance session.

Viktor Veszpremi Purdue University, CDF Collaboration Tev4LHC Workshop, Oct , Fermilab ZH->vvbb results from CDF.

Fourth Generation Leptons Linda Carpenter April 2011.

American Physical Society Meeting St. Louis, MO April th, 2008 Measuring the top mass at DØ using the Ideogram Method Amnon Harel

Study of Diboson Physics with the ATLAS Detector at LHC Hai-Jun Yang University of Michigan (for the ATLAS Collaboration) APS April Meeting St. Louis,

SESAPS November 11, B. Scurlock, University of Florida1 Bobby Scurlock Darin Acosta Paolo Bartalini Richard Cavanaugh Alexey Drozdetskiy Guenakh.

Report from SUSY working group

Missing ET with the First Data: Wl (l=e,)

Introduction to hands-on Exercise

on top mass measurement based on B had decay length

Early EWK/top measurements at the LHC

SUSY Particle Mass Measurement with the Contransverse Mass Dan Tovey, University of Sheffield 1.

ATLAS: Missing Transverse Energy in the Search for Supersymmetry

Deep Inelastic Scattering 2006

Alan Barr Claire Gwenlan

Tevatron and LHC: Similarities and Complementarities Beate Heinemann University of California at Berkeley Lawrence Berkeley National Laboratory _ √s=1.96.

An Important thing to know.

W Charge Asymmetry at CDF

Measuring masses of semi-invisible decays

Di-jets & MT2 for early SUSY discovery

Plans for checking hadronic energy

-signals and background for new physics searches-

UCLA High Energy & Astro-Particle (HEAP) Seminar

Searches at LHC for Physics Beyond the Standard Model

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

SUSY SEARCHES WITH ATLAS

T. Ferbel University of Rochester Planck 2002, Kazimierz

Inclusive Measurements as an mSUGRA Signal with ATLAS

Susan Burke, University of Arizona

The Top Chromo-magnetic Moment

Presentation transcript:

Missing Transverse Energy Calibration in W/Z(+jets) Events Jason Nielsen Santa Cruz Institute for Particle Physics University of California, Santa Cruz UC Davis HEFTI Workshop on Missing Energy Signals at LHC April 1, 2009

Missing Energy Calibration Goals for calibration: Resolution (measured for at least one point) Linearity (requires at least two points) Extrapolation (unknown requirements) Z/W (+jet) events provide a known true missing transverse energy Assume for now that any effects of MET on acceptance can be unfolded/corrected Also assume backgrounds are small (Z), or can be measured in-situ (W) J. Nielsen Davis Missing Energy 2009

MET Scale from Z(ee) Events Define projection axis along Z momentum Note this is anti-parallel to the hadronic recoil system Elong gives measure of energy scale, Eperp gives angular resolution Find that Elong is the challenge J. Nielsen Davis Missing Energy 2009

Artificial Z Decays to Neutrinos Replace one lepton from Z by neutrino to simulate W decay with nonzero MET In simulation, true MET is the ET of removed lepton In collider data, will remove calorimeter deposits associated with lepton J. Nielsen Davis Missing Energy 2009

MET in W Events Choice of measuring W mass or calibrating MET! MET smearing does not completely wash out sensitivity to W transverse mass Numerical methods for convoluting mass with resolution functions Resolutions measured in early W/Z analyses J. Nielsen Davis Missing Energy 2009

Results from Many Samples Check samples with larger true MET: top pairs, SUSY LSPs, high-mass tau pairs These high-MET samples don’t have a “truth” handle which is known a priori – taken from simulation J. Nielsen Davis Missing Energy 2009

Extrapolation to Higher Energies These data-driven methods are limited to the low-energy bulk of the MET distribution How to get to the 300 GeV regime? J. Nielsen Davis Missing Energy 2009