# Direct Measurement of the $W$ Production Charge Asymmetry in $\ppbar$ Collisions at $\sqrt{s} = 1.96$ TeV

Abstract : We present the first direct measurement of the $W$ production charge asymmetry as a function of the $W$ boson rapidity $\yW$ in $\ppbar$ collisions at $\sqrt{s} = 1.96$ $\TeV$. We use a sample of $\wenu$ events in data from 1 $\ifb$ of integrated luminosity collected using the CDF II detector. In the region $|\yW| <$ 3.0, this measurement is capable of constraining the ratio of up and down quark momentum distributions in the proton more directly than in previous measurements of the asymmetry that are a function of the charged-lepton pseudorapidity.
Document type :
Preprints, Working Papers, ...

http://hal.in2p3.fr/in2p3-00354538
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Submitted on : Tuesday, January 20, 2009 - 11:02:40 AM
Last modification on : Wednesday, September 15, 2021 - 2:56:02 PM

### Identifiers

• HAL Id : in2p3-00354538, version 1
• ARXIV : 0901.2169

### Citation

T. Aaltonen, J. Adelman, T. Akimoto, B. Alvarez Gonzalez, S. Amerioy, et al.. Direct Measurement of the $W$ Production Charge Asymmetry in $\ppbar$ Collisions at $\sqrt{s} = 1.96$ TeV. 2009. ⟨in2p3-00354538⟩

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