TeV4LHC:
Top and Electroweak Working Group
Outlines for Top & EW report:
TeV4LHC:
Top and Electroweak Working Group
Outlines for Top & EW report:
I. IntroductionThe TeV4LHC workshop is a year-long series of meetings to explore the interface between the physics programs at the Tevatron Run II and the LHC. The goal is to see how the Tevatron can impact the LHC physics program, and how the experience at Run II can be helpful at the LHC.
Convenors:
Cecilia Gerber(D0),
Pasha Murat(CDF),
Tim Tait(TH),
Evelyn Thomson(CDF),
Doreen Wackeroth(TH).
II. Draft Goals for Top & EW Working Group
Top production (ttbar and single top)
Better models of event characteristics Currently use LO PYTHIA/HERWIG/ALPGEN: What physics is included? What's not? Investigate MC@NLO ttbar production top mass - control of systematic errors single top "aiming for discovery" analysis techniques for difficult signal extend already good dialogue with theorists Top Properties
How well can we measure Vtb, (Vts, Vtd)? Is there any shot at the t-t-Z vertex before a linear collider? What kind of bounds on anomalous couplings can we expect from Tevatron? W+jets, Wbb+jets, Wcc+jets, Wc+jets
Major backgrounds to top (cross-section, W helicity, single top) and new physics (Higgs, anything with lepton, MET and jets) NLO exists for W+2jets and Wbbar how can we use it in analyses? eg single top search Check assumptions for ttbar background estimates LO Matrix Elements
How to combine events generated with different numbers of b, c and jets? This is a big problem for background calculations and kinematic modeling. Test approaches suggested by Mangano and CKKW and others... Choice of scale? Top as a Background to New Physics
How good does tt, ttj and ttjj (background to qqH->qqWW at for low mass Higgs search in first years of LHC) have to be? Can we test the theoretical predictions for ttbar and single top? A lot of LHC Higgs physics these days relies on the W-fusion production modes. PDFs
Top is a clean way to study PDFs at high x, which is definately of interest for LHC. Single-top in the t-channel is perhaps a unique way to measure the b PDF at high x, which can be important for Higgs physics, etc. W Mass
Study of different methods (traditional M_T method vs cross section ratios, p_T distributions etc.) What can we learn from Tevatron? What needs to be done to get ready for LHC? Improved Monte Carlos, combination of RESBOS (QCD) and WGRAD/ZGRAD (EWK), inclusion of higher orders (QED) etc. Other W/Z topics
Measurements of triple gauge boson couplings, asymmetries, total cross sections. What can we learn about PDFs and new physics (e.g. search for anomalous TGCs, extra gauge bosons) ? W and Z events as luminosity monitors
III. Working Group MembersPlease email the convenors to join the mailing list.
IV. MeetingsFinal meeting: Fermilab, 20-22 October, 2005 The agenda can be found here.
The 3nd meeting was held at CERN, April 28-30, 2005 : The agenda and transparencies of the talks can be found here.
The 2nd meeting was held at BNL, Feb. 3-5, 2005 : The agenda can be found here.
Top/EW Working Group Meeting at FNAL, Dec. 1, 2004 : The agenda and transparencies of the talks can be found here.
Initial Meeting at FNAL, Sept. 16-18, 2004 : The agenda and transparencies of the talks can be found here.
V. Links to More InformationChoice of input parameters for tuned comparison of Monte Carlo programs for electroweak gauge boson production.
A.Schmidt's Thesis on W Mass Measurements at the LHC.
Atlas Note concerning anomalous top couplings
Resbos grids including small x effects (Courtesy of Pavel Nadolsky)