Measurement of the effective weak mixing angle by jet-charge asymmetry in hadronic decays of the Z boson

M Acciarri,O Adriani,G Alemanni,J Alcaraz,A Aloisio,J Allaby,S P Ahlen ,M Aguilar-Benı́tez ,F Linde

doi:10.1016/s0370-2693(98)01174-5

Measurement of the effective weak mixing angle by jet-charge asymmetry in hadronic decays of the Z boson

M Acciarri, O Adriani + Show 7 more

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https://doi.org/10.1016/s0370-2693(98)01174-5

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Journal: Physics Letters B	Publication Date: Oct 1, 1998
Citations: 13	License type: cc-by-nc-nd

Affiliation: INFN Sezione di Milano, University of Florence, INFN Sezione di Firenze, University of Lausanne, Cemat (Italy), INFN Sezione di Napoli, European Organization for Nuclear Research, Boston University, University of Amsterdam

#Effective Weak Mixing Angle #Jet Charge + Show 8 more

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Abstract

The coupling of the Z boson to quarks is studied in a sample of about 3.5 million hadronic Z decays collected by the L3 experiment at LEP from 1991 to 1995. The forward–backward quark charge asymmetry is measured by means of a jet charge technique. From the measured asymmetries, the effective weak mixing angle is determined to be sin 2 θ W =0.2327±0.0012(stat.)±0.0013(syst.) .

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