The effective electroweak mixing angle sin2 theta(w)BAR is measured from the production and decay of the Z boson in e+ e-interactions. The data sample corresponds to an integrated luminosity of 18 pb-1 with about 420 000 hadronic and 40000 leptonic Z decays. The mixing angle sin2 theta(w)BAR is determined from several independent measurements: the leptonic and hadronic cross sections, the forward-backward asymmetries of charged leptons and b-quarks, and the tau-polarization. The results are found to be in good agreement with each other. The value of sin2 theta(w)BAR from a fit to the asymmetries in a model independent method is 0.2321+/-0.0021 and from a global fit to the data in the Standard Model framework is 0.2328+/-0.0013.

Determination of the Effective Electroweak Mixing Angle From Z-decays / O. ADRIANI, M. AGUILARBENITEZ, S. AHLEN, J. ALCARAZ, A. ALOISIO, G. ALVERSON, M. G. ALVIGGI, G. AMBROSI, Q. AN, H. ANDERHUB, A. L. ANDERSON, V. P. ANDREEV, L. ANTONOV, D. ANTREASYAN, P. ARCE, A. AREFIEV, A. ATAMANCHUK, T. AZEMOON, T. AZIZ, P. V. K., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 309:(1993), pp. 451-462. [10.1016/0370-2693(93)90961-G]

Determination of the Effective Electroweak Mixing Angle From Z-decays

ADRIANI, OSCAR;D'ALESSANDRO, RAFFAELLO;M. LENTI;
1993

Abstract

The effective electroweak mixing angle sin2 theta(w)BAR is measured from the production and decay of the Z boson in e+ e-interactions. The data sample corresponds to an integrated luminosity of 18 pb-1 with about 420 000 hadronic and 40000 leptonic Z decays. The mixing angle sin2 theta(w)BAR is determined from several independent measurements: the leptonic and hadronic cross sections, the forward-backward asymmetries of charged leptons and b-quarks, and the tau-polarization. The results are found to be in good agreement with each other. The value of sin2 theta(w)BAR from a fit to the asymmetries in a model independent method is 0.2321+/-0.0021 and from a global fit to the data in the Standard Model framework is 0.2328+/-0.0013.
1993
309
451
462
O. ADRIANI;M. AGUILARBENITEZ;S. AHLEN;J. ALCARAZ;A. ALOISIO;G. ALVERSON;M. G. ALVIGGI;G. AMBROSI;Q. AN;H. ANDERHUB;A. L. ANDERSON;V. P. AN...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/772754
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