Precision Electroweak Measurements on the Z Resonance

The LEP Electroweak Working Group, the SLD Electroweak Group and the Heavy Flavor Group
have combined the set of all electroweak measurements relevant to the Z to be published in Physics Reports.

The relevant LEP EWWG physrep Z-pole paper editorial working page is here .
I maintain a .pdf version and a .ps version of the latest draft (note that life goes on after death - this draft is more final than the "finished" version)
An archive of drafts distributed to the collaborations is available

Summer 2001 (May 25 2001) .pdf or .ps
Winter 2001 (Dec 18 2001) .pdf or .ps
Summer 2003 (June 14 2003) .pdf or .ps
The finished paper as posted to hep/ex0509008.pdf hep/ex0509008.ps (The direct hep/ex link)

I am responsible for the Bibliography.

A world-accessible html version is available. This provides active links to Spires. Links to full-text pdf files for many articles are also provided, but these files are only available on a CD, due to their size. If you are interested in obtaining a copy, I can add you to my distribution list.
The full html version is available from within the CERN firewall. This is guaranted to be up-to-date, and the links to the full-text pdf files are active. To access this site from outside the firewall, construct a tunnel:
ssh -L 8080:137.138.41.138:80 lxplus002.cern.ch then:
http://localhost:8080/~kellogg/public/

A list of arxiv and preprint citations is availble for review to check for possible upgrades 05.01.05

The complicated instructions for setting up a Self-administered Phone Conference must be followed scrupulously to ensure success

Activities of the OPAL editorial board on the Physrep paper

Activities of the EWWG editorial board on the Physrep paper

List of Significant Topical Discussions

The sin^2_lepton_effective Discrepancy

One uncomfortable issue affecting the results is the discrepancy between the leptonic and hadronic measurements of sin^2_lepton-effective.

A Modest Proposal concerning the OPAL position on the A_b (or sin^2_l) discrepancy
Transparencies for presentation "The Legacy of sin^2_lepton_effective " at the OPAL Plenary in Budapest
Kellogg presents An Escapade in the Tails of the Gaussian 19.09.01
Abstract for talk "The Legacy of sin^2_lepton_effective" submitted to Sienna conference on the legacy of LEP and SLC
Discussion of summer 2001 combination . Many opinions on sin^2 discrepancy presented.
An Essential Triviality - where Kellogg argues for arrows on the plot of sin2 vs rho
8 by 10 Glossy photographs would do justice to explaining sin^2 vs rho
Fundamental properties of A_f might better be discussed in the Introduction - a proposal - .pdf - .tex - figure .eps
Some papers discussing the discrepancy in A_b

John Field's comments to the lepewwg in 1998
J,H. Field hep-ex_9907018 Mod.Phys.Lett.A15:761-774,2000 A Study of the LEP and SLD Measurements of A b
J.H.Field and D.Sciarrino hep-ex/9907018 phys rev D61 013010 Indirect limit on the standard model Higgs boson mass from the precision Fermilab, LEP, and SLD data
Michael S. Chanowitz hep-ph/ 0104024 PhysRevLett 87 231802 The Z to bb decay asymmetry: lose-lose for the Standard Model
William J. Marciano hep-ph_0411179 Precision Electroweak Measurements and the Higgs Mass

Correspondence with the PDG
A copy of the Aug 2001 PDG ew physics review shows their treatment (note this treats the new Afb(b) but not NuTeV)

The NuTeV Discrepancy

The final NuTeV result on the charged/neutral current coupling to nucleons lowered its error and shifted by one (old) sigma. When interpreted as an indirect measure of mW, this changes a reasonable 1.75 sigma agreement with the direct Mw measurements at LEP 2 and Fermilab into a 3.5 sigma discrepancy

here is a link to the NuTeV web page
here is a copy of their eprint
the ewwg has included the new result in the SM fit
some discussion of how to treat this issue has taken place
Kellogg proposes a way to clear the NuTeV train wreak
which of course generated considerable further discussion
for theoretical considerations, see the less speculative sections of JHEP 0202:037,2002 )
two interpretive eprints from NuTeV hep-ex 0205079 and hep-ex 0205080
McFarland and Moch (two NuTeV collaborators) investigate the discrepancy hep-ph_0306052
Diener, Dittmaier and Hollik hep-ph_0310364.pdf question the radiative corrections used in the NuTeV analysis
Olness et.al. find large uncertainty in strangeness asymmetry from dimuon production hep-ph/0312323
Kretzer et.al. find strangeness asym + isospin violating effects could remove NuTeV discrepancy hep-ph/0312322

Is the Higgs Invisible?

Could the radiative effects of the Higgs be currently as invisible to us as the particle itself?

Some recent theoretical papers support this idea, and find limits on the symmetry breaking mass scale in the absence of the Higgs

Kniehl and Sirlin [epjc C16 (2000) 635] find Lambda< 245 GeV under simple conditions
Bagger, Falk and Swartz [prl 84 (2000) 1385] find Lambda can be as large as 3 TeV

Is a mass-dependent width still considered appropriate for the Z?

A not completely conclusive discussion with a few theorists first raises this issue, then puts it to rest

How the Z-Pole Measurements Constrain the Standard Model Parameters

A plot of Mt vs log(Mh) shows the how the gears of the Standard Model turn
This plot initiated a long train of discussion concerning the behavior of Gamma_l at low Mh, which ultimately led to a discussion of Higgsstrahlung
Kellogg and Tatsuo prepare a paper (hep-ex/0402039, Phys.Rev. D69 (2004) 113008) addressing these issues

Precision Electroweak Measurements on the Z Resonance

Activities of the OPAL editorial board on the Physrep paper

Activities of the EWWG editorial board on the Physrep paper

List of Significant Topical Discussions

The sin^2_lepton_effective Discrepancy

The NuTeV Discrepancy

Is the Higgs Invisible?

Is a mass-dependent width still considered appropriate for the Z?

How the Z-Pole Measurements Constrain the Standard Model Parameters

Points for June 2002 discussion on the Physrep Paper

2003 Checks on Heavy Flavor Tables

Final (2004) Checks on Heavy Flavor Tables

The Imaginary Part of alpha is the Biggest Remnant

Interpreting the theoretical error in alpha_s has been difficult

The Validity of Equations 1.18 etc - A Discussion Initiated by John Field

The Bane of Bayesianism - Kellogg considers a consistent Mhiggs limit