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Measurement of the electron charge asymmetry in inclusive W production in pp collisions at vs=7TeV

Abstract: A measurement of the electron charge asymmetry in inclusive pp?W+X?e?+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?1. The electron charge asymmetry reflects the unequal production of W+ and W? bosons in pp collisions. The electron charge asymmetry is measured in bins of the absolute value of electron pseudorapidity in the range of |?|<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.

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Authorship: Chatrchyan S., Khachatryan V., Sirunyan A.M., Tumasyan A., Adam W., Bergauer T., Dragicevic M., Erö J., Fabjan C., Friedl M., Frühwirth R., Ghete V.M., Hammer J., Hörmann N., Hrubec J., Jeitler M., Kiesenhofer W., Knünz V., Krammer M., Liko D., Mikulec I., Pernicka M., Rahbaran B., Rohringer C., Rohringer H., Schöfbeck R., Strauss J., Taurok A., Wagner P., Waltenberger W., Walzel G., Widl E., Wulz C.E., Mossolov V., Shumeiko N.,

Fuente: Physical Review Letters, 2012, 109(11), 111806

Publisher: American Physical Society

Publication date: 01/09/2012

No. of pages: 15

Publication type: Article

DOI: 10.1103/PhysRevLett.109.111806

ISSN: 0031-9007,1079-7114

Publication Url: https://doi.org/10.1103/PhysRevLett.109.111806

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