Measurement of the Electron Charge Asymmetry in Inclusive W Production in pp Collisions at √s=7 TeV
Author(s)Bauer, Gerry P.; Bendavid, Joshua L.; Busza, Wit; Butz, Erik M.; Cali, Ivan Amos; Chan, M.; Dutta, V.; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Hahn, Kristian Allan; Kim, Y.; Klute, Markus; Krajczar, Krisztian F.; Li, W.; Luckey, P. David, Jr.; Ma, Teng; Nahn, Steven; Paus, Christoph M. E.; Ralph, Duncan Kelley; Roland, Christof E.; Roland, Gunther M.; Rudolph, M.; Stephans, George S. F.; Stockli, Fabian; Sumorok, Konstanty C.; Sung, Kevin Kai Hong; Velicanu, Dragos Alexandru; Wenger, Edward Allen; Wolf, R.; Wyslouch, Boleslaw; Xie, S.; Yang, M.; Yilmaz, Yetkin; Yoon, A. S.; Zanetti, Marco; ... Show more Show less
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A measurement of the electron charge asymmetry in inclusive pp→W+X→eν+X production at √s=7 TeV is presented based on data recorded by the CMS detector at the LHC and corresponding to an integrated luminosity of 840 pb[superscript -1]. The electron charge asymmetry reflects the unequal production of W[superscript +] and W[superscript -] bosons in pp collisions. The electron charge asymmetry is measured in bins of the absolute value of electron pseudorapidity in the range of |η|<2.4. The asymmetry rises from about 0.1 to 0.2 as a function of the pseudorapidity and is measured with a relative precision better than 7%. This measurement provides new stringent constraints for parton distribution functions.
DepartmentMassachusetts Institute of Technology. Laboratory for Nuclear Science
Physical Review Letters
American Physical Society
Chatrchyan, S. et al. “Measurement of the Electron Charge Asymmetry in Inclusive W Production in Pp Collisions at Sqrt[s]=7 TeV.” Physical Review Letters 109.11 (2012).
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