Direct measurement of the W production charge asymmetry in pp̄ collisions at s=1.96TeV

Authors

T. Aaltonen, Helsingin Yliopisto
J. Adelman, The Enrico Fermi Institute
T. Akimoto, University of Tsukuba
B. Álvarez González, Universidad de Cantabria
S. Amerio, Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
D. Amidei, University of Michigan, Ann Arbor
A. Anastassov, Northwestern University
A. Annovi, INFN, Laboratori Nazionali Di Frascati
J. Antos, Univerzita Komenského v Bratislave
G. Apollinari, Fermi National Accelerator Laboratory
A. Apresyan, Purdue University
T. Arisawa, Waseda University
A. Artikov, Joint Institute for Nuclear Research, Dubna
W. Ashmanskas, Fermi National Accelerator Laboratory
A. Attal, Universitat Autònoma de Barcelona
A. Aurisano, Texas A&M University
F. Azfar, University of Oxford
P. Azzurri, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
W. Badgett, Fermi National Accelerator Laboratory
A. Barbaro-Galtieri, Lawrence Berkeley National Laboratory
V. E. Barnes, Purdue University
B. A. Barnett, Johns Hopkins University
V. Bartsch, University College London
G. Bauer, Massachusetts Institute of Technology
P. H. Beauchemin, Université McGill
F. Bedeschi, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
D. Beecher, University College London
S. Behari, Johns Hopkins University

Document Type

Article

Publication Date

5-6-2009

Abstract

We present the first direct measurement of the W production charge asymmetry as a function of the W boson rapidity yW in pp̄ collisions at s=1.96TeV. We use a sample of W→eν events in data from 1fb-1 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 functions of the charged-lepton pseudorapidity. © 2009 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

Recommended Citation

Aaltonen, T., Adelman, J., Akimoto, T., Álvarez González, B., Amerio, S., Amidei, D., Anastassov, A., Annovi, A., Antos, J., Apollinari, G., Apresyan, A., Arisawa, T., Artikov, A., Ashmanskas, W., Attal, A., Aurisano, A., Azfar, F., Azzurri, P., Badgett, W., Barbaro-Galtieri, A., Barnes, V., Barnett, B., Bartsch, V., Bauer, G., Beauchemin, P., Bedeschi, F., Beecher, D., & Behari, S. (2009). Direct measurement of the W production charge asymmetry in pp̄ collisions at s=1.96TeV. Physical Review Letters, 102 (18) https://doi.org/10.1103/PhysRevLett.102.181801