WW g /WWZ vertices Status of TGC paper

04/12/2003 S. Jezequel (LAPP) 1

WW/WWZ verticesStatus of TGC paper

S. Jézéquel (LAPP)


Previous 'publications'• Measurement of Triple Gauge-Boson Couplings at LEP energies up to

189 GeV :Eur. Phys. J., C 21 (2001) 423• Measurement of Triple Gauge-Boson Couplings in e+e- collisions up

to 209 GeV : Summer conf. 2003• Thesis of R. Bruneliere

People still in the game

• S. Jézéquel (W+W- OO method +single W + combination)

• T. Barklow (W+W- likelihood method + CP violating/conserving couplings)


W+W- analysis

• Standard 3 couplings ( g1z, ) measured with Optimal Observable

• Need to rerun with the last reconstruction (small change foreseen)


W+W- results (conf note 03)

Stat.+Syst.g1z=1.030+0.035

-0.034

=1.029+0.097-0.082

=0.014+0.034-0.033


W+W- results systematics

O():•Dominated by Racoon/YFS difference(Work of F. Cossutti (DELPHI))•Same amplitude as O() itself


Likelihood method • Individual parameters


Likelihood method(2)

• Techni-rho– Form factor (FT)– Mass/Width

M>625 GeV


Single W• Extension of the cross section work

• Remove single W already selected as WW (mainly as qq)

• Use Koralw efficiency + LEP cross section (relevant for qq)


Single W(2)


WW+single W/ : 1D

Single W will change

Stat.+Syst.g1z=1.030+0.035

-0.034

=0.990+0.072-0.068

=0.014+0.033-0.032


WW+single W/ : 2/3D


Supposed to be already written

• Selection from the WW cross section and single boson cross section papers

• Reconstruction in the W mass paper

Already explained in 189 GeV paper

• Optimal Observable method

• No change for single analysis


Items to be put in the final TGC paper

• Description of the likelihood method (T. Barklow)

• Shift from OO1+iteration to OO2

• Single W new MC (efficiency)+remove already selected as WW

• Use the same reconstruction as W mass for consistency but no sensitivity


Time scale

• As soon as possible

• Finish the single W analysis

• Recheck all WW systematics ( almost already done)

• Paper should be finished before La Thuile

WW g /WWZ vertices Status of TGC paper

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