6/27/00

 List of Run II Electroweak Theses

 Of course there are many styles of theses.  Style depends on whether 
 the result is a precision measurement, a measurement, or a limit, on 
 the number of signal events and on the expected amount of background. 
 The delineations are not exactly cut-and-dried. All kinds of analyses 
 are available in the electroweak group.

 This list is meant to give people a taste of theses that are available. 
 It isn't meant to be comprehensive so if you want to do something not 
 on this list, come and talk to us. 

                                            Tom and Armand

 
 "Measurements" and "Precisions Measurements" and "Limits"

    W asymmetry
      Forward-backward W+ vs W- measures quark and antiquark parton 
      distributions.  This result is input necessary for W mass.
      Electrons and muons. Lots of events. 100-200 pb-1 and 2 fb-1.

    W pT Spectrum
      A test of production model. Results are input necessary for W mass.
      Lots of events. Electrons and muons, I think.  200 pb-1 and 2 fb-1.

    Z pT Spectrum
      A test of production model. Results are input necessary for W mass.
      Lots of events but 1/10th number of W's. Electrons and muons. 
      200 pb-1 and 2 fb-1.

    W Mass in electron decay mode: 
      Lots of events, small background. Result from M_T(ev) and maybe p_T(e) 
      and maybe p_T(v) available in ~ 200 pb-1.  High precision result 
      available in 2 fb-1.

    Z Forward/Backward Asymmetry
      Measures sin^2(theta_W). Electrons and muons. Lots of events but 
      1/10th as many as W's. 100-200 pb-1 and 2 fb-1. 

    W Width
      Direct and Indirect.  Direct uses tail of mT(W) distribution and is 
      independent of theoretical uncertainty in production model.  Indirect
      uses R=sigma.b(W->lv)/sigma.b(Z->ll) and theoretical input on 
      production. 200 pb-1 and 2 fb-1. 

    W and Z Cross Sections
      Both electron, muon, and tau cross sections are possible. Plenty of 
      events. 

    Drell-Yan Cross Section
      Dilepton invariant mass spectrum to highest possible mass. Running 
      the Tevatron at 2000 GeV makes this interesting in first 100 pb and 
      in 2 fb-1.

    W Rare Decays
      CDF measured ratio of W->pi-gamma/W->lnu limit in Run 1. SM is 
      b.f. of 10-8.

    Wgamma->evgamma and mvgamma
      ~120 events per 100 pb-1. 20%-ish background from jets that mimic 
      photons. First observation of the "radiation zero" is available.
      100-200 pb-1 and 2 fb-1. Electrons and muons. 

    WW->dileptons
      5-10 events per 100 pb-1. Signal-to-background ~3:1. Measure cross 
      section and limit anomalous trilinear couplings. 100-200 pb-1 and 
      2 fb-1. 

    WZ->trileptons
      Measure cross section and limit trilinear couplings.  Electrons and 
      muons. ~ 1 event per 100 pb-1. Signal to background is 2:1-ish. 
      200 pb-1 for a limit and 2 fb-1 for cross section. 

    WZ->lvbbbar
      We should expect ~250 signal events in 2 fb-1, not counting eff'y 
      and acceptance.  The higher branching fraction may makes this better 
      than trileptons for anomalous trilinear couplings.  This is a bit
      of a wild card in that it may provide the cleanest Z->bbbar signal.
   
    WW/WZ -> lvjj
      Big background, small signal anomalous trilinear coupling analysis
      that we did a couple times in Run I. 

    Zgamma->llgamma
      In the charged lepton mode (electrons and muons) we had ~31 of these
      in Run I with a 20%-ish background. We limited anomalous trilinear 
      couplings. In the neutrino decay mode we had a signal to background 
      of ~1:1 (if I recall) and also limited anomalous trilinear couplings. 
      We do especially well in Zgamma at the Tevatron. 

    Zgamma->bbbargamma
      This is a also bit of a wild card. 2 fb-1 gives us ~1000 signal events 
      with a background equal-to or bigger from jets and photons. 
      Certainly provides anomalous coupling limits. May provide us with 
      suprises. 

    ZZ Production
      CDF saw one 4 lepton event in Run 1. We can expect to see a few in 
      200 fb-1.  Provides anomalous coupling limits. 

    WWgamma and Wgammagamma Production
      Yeah, the SM can do this.  It should be interesting for anomalous 
      quadrilinear coupling analyses in 2 fb-1 and maybe sooner if we are 
      clever. Pushing the photon Et spectrum down to 5 GeV or lower makes 
      a big difference in the cross section for signal.  I wondor if this 
      has some bearing on M(W) in case W or decay products radiate 2 
      photons.