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Measurement of the Effective Weak Mixing Angle in p(p)over-bar -> Z/gamma* -> e(+)e(-) Events
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2015 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 115, no 4, 041801Article in journal (Refereed) Published
Abstract [en]

We present a measurement of the fundamental parameter of the standard model, the weak mixing angle sin(2)theta(l)(eff) which determines the relative strength of weak and electromagnetic interactions, in p (p) over bar -> Z/gamma* -> e(+)e(-) events at a center of mass energy of 1.96 TeV, using data corresponding to 9.7 fb(-1) of integrated luminosity collected by the D0 detector at the Fermilab Tevatron. The effective weak mixing angle is extracted from the forward-backward charge asymmetry as a function of the invariant mass around the Z boson pole. The measured value of sin(2)theta(l)(eff) = 0.23147 +/- 0.00047 is the most precise measurement from light quark interactions to date, with a precision close to the best LEP and SLD results.

Place, publisher, year, edition, pages
2015. Vol. 115, no 4, 041801
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-260620DOI: 10.1103/PhysRevLett.115.041801ISI: 000358369000002PubMedID: 26252676OAI: oai:DiVA.org:uu-260620DiVA: diva2:848558
Funder
Swedish Research Council
Available from: 2015-08-25 Created: 2015-08-21 Last updated: 2017-12-04Bibliographically approved

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