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Direct Measurement of the W Production Charge Asymmetry in pp Collisions at root s=1.96 TeV

Aaltonen, T; Adelman, J; Akimoto, T; Alvarez Gonzalez, B; Amerio, S; Amidei, D; Anastassov, A; ... Zucchelli, S; + view all (2009) Direct Measurement of the W Production Charge Asymmetry in pp Collisions at root s=1.96 TeV. Physical Review Letters , 102 (18) , Article 181801. 10.1103/PhysRevLett.102.181801. Green open access

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Abstract

We present the first direct measurement of the W production charge asymmetry as a function of the W boson rapidity y(W) in pp collisions at root s=1.96 TeV. We use a sample of W -> e nu events in data from 1 fb(-1) of integrated luminosity collected using the CDF II detector. In the region |y(W)|< 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 functions of the charged-lepton pseudorapidity.

Type: Article
Title: Direct Measurement of the W Production Charge Asymmetry in pp Collisions at root s=1.96 TeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.102.181801
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.102.181801
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: PARTON DISTRIBUTIONS, ELECTROMAGNETIC CALORIMETER, P(P)OVER-BAR COLLISIONS
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/143137
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