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

0455626 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … celkem 364 autorů
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
Institucionální podpora: RVO:68378271
Klíčová slova: D0 * Batavia TEVATRON Coll * anti-p p * inclusive reaction * electron * pair production * Drell-Yan process * angular distribution * asymmetry
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 7.645, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0256254