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.;P. BAGNAIA;J. A. BAKKEN;L. BAKSAY;R. C. BALL;S. BANERJEE;J. BAO;R. BARILLERE;L. BARONE;A. BASCHIROTTO;R. BATTISTON;A. BAY;F. BECATTINI;J. BECHTLUFT;R. BECKER;U. BECKER;F. BEHNER;J. BEHRENS;G. L. BENCZE;J. BERDUGO;P. BERGES;B. BERTUCCI;B. L. BETEV;M. BIASINI;A. BILAND;G. M. BILEI;R. BIZZARRI;J. J. BLAISING;G. J. BOBBINK;R. BOCK;A. BOHM;B. BORGIA;M. BOSETTI;D. BOURILKOV;M. BOURQUIN;D. BOUTIGNY;B. BOUWENS;E. BRAMBILLA;J. G. BRANSON;I. C. BROCK;M. BROOKS;A. BUJAK;J. D. BURGER;W. J. BURGER;J. BUSENITZ;A. BUYTENHUIJS;X. D. CAI;M. CAPELL;M. CARIA;G. CARLINO;A. M. CARTACCI;R. CASTELLO;M. CERRADA;F. CESARONI;Y. H. CHANG;U. K. CHATURVEDI;M. CHEMARIN;A. CHEN;C. CHEN;G. M. CHEN;H. F. CHEN;H. S. 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VOGT;I. VOROBIEV;A. A. VOROBYOV;L. VUILLEUMIER;M. WADHWA;W. WALLRAFF;C. WANG;C. R. WANG;G. H. WANG;X. L. WANG;Y. F. WANG;Z. M. WANG;C. WARNER;A. WEBER;J. WEBER;R. WEILL;T. J. WENAUS;J. WENNINGER;M. WHITE;C. WILLMOTT;F. WITTGENSTEIN;D. WRIGHT;S. X. WU;S. WYNHOFF;B. WYSLOUCH;Y. Y. XIE;J. G. XU;Z. Z. XU;Z. L. XUE;D. S. YAN;B. Z. YANG;C. G. YANG;G. YANG;C. H. YE;J. B. YE;Q. YE;S. C. YEH;Z. W. YIN;J. M. YOU;N. YUNUS;M. YZERMAN;C. ZACCARDELLI;P. ZEMP;M. ZENG;Y. ZHENG;D. H. ZHANG;Z. P. ZHANG;B. ZHOU;G. J. ZHOU;J. F. ZHOU;R. Y. ZHU;A. ZICHICHI;B. C. C.. - 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.I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.