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Phys. Rev. Lett. 98, 251801 (2007) [7 pages]

First Measurement of the Ratio of Central-Electron to Forward-Electron W Partial Cross Sections in pp̅ Collisions at s=1.96  TeV

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A. Abulencia et al. CDF Collaboration
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Received 17 February 2007; published 20 June 2007

We present a measurement of σ(pp̅ →WB(Weν) at s=1.96  TeV, using electrons identified in the forward region (1.2<|η|<2.8) of the CDF II detector, in 223  pb-1 of data. We measure σ×B=2796±13(stat)-90+95(syst)±162(lum)  pb. Combining this result with a previous CDF measurement obtained using electrons in the central region (|η|≲1), we present the first measurement of the ratio of central-electron to forward-electron W partial cross sections Rexp⁡=0.925±0.006(stat)±0.032(syst), consistent with theoretical predictions using Coordinated Theoretical-Experimental Project on QCD (CTEQ) and Martin-Roberts-Stirling-Thorne (MRST) parton distribution functions.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.251801
DOI:
10.1103/PhysRevLett.98.251801
PACS:
13.38.Be, 12.38.Qk, 13.85.Qk, 14.70.Fm