### Session E7: Electroweak Physics with W's and Z's

3:30 PM–5:06 PM, Saturday, April 16, 2005
Marriott Tampa Waterside Room: Room 1

Chair: John Laiho, Fermilab

Abstract ID: BAPS.2005.APR.E7.6

### Abstract: E7.00006 : A New Method to Measure the Ratio of W and Z Cross Sections

4:42 PM–4:54 PM

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#### Authors:

Katherine Copic
(University of Michigan)

Victoria Martin
(Northwestern University)

Michael Schmitt
(Northwestern University)

We present a new method for the measurement of the ratio, $R$, of cross sections for~$W$ and~$Z$ production in $p\bar{p}$~collisions at the Fermilab Tevatron. The leptonic signals from~$W$ and~$Z$ decays are treated in a strictly parallel fashion, and the~$p_T$ spectrum of the lepton is used to infer their relative rates. A preliminary measurement has been obtained from data collected with the CDF~II detector corresponding to approximately $350$~pb$^{-1}$. Using this value for~$R$ we extract a value for the width of the $W$~boson.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2005.APR.E7.6