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Measurement of the effective weak mixing angle in pp¯→Z/γ*→e.sup.+./sup.e.sup.-./sup. events

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    0455626 - FZÚ 2016 RIV US eng J - Journal Article
    Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … Total 364 authors
    Measurement of the effective weak mixing angle in pp¯→Z/γ*→e+e- events.
    Physical Review Letters. Roč. 115, č. 4 (2015), "041801-1"-"041801-8". ISSN 0031-9007. E-ISSN 1079-7114
    Institutional support: RVO:68378271
    Keywords : D0 * Batavia TEVATRON Coll * anti-p p * inclusive reaction * electron * pair production * Drell-Yan process * angular distribution * asymmetry
    Subject RIV: BF - Elementary Particles and High Energy Physics
    Impact factor: 7.645, year: 2015

    We present a measurement of the fundamental parameter of the standard model, the weak mixing angle sin2θeffℓ which determines the relative strength of weak and electromagnetic interactions, in pp¯→Z/γ*→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 sin2θeffℓ=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.
    Permanent Link: http://hdl.handle.net/11104/0256254

     
     
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