Improved Direct Measurement of Leptonic Coupling Asymmetries with Polarized<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi mathvariant="italic">Z</mml:mi></mml:math>Bosons
Koya Abe(Aomori University), Kenji Abe(Aomori University), K. Abe(SLAC National Accelerator Laboratory), И. Адам(SLAC National Accelerator Laboratory), H. Akimoto(SLAC National Accelerator Laboratory), D. Aston(SLAC National Accelerator Laboratory), K. Baird(University of Massachusetts Amherst), C Baltay(Yale University), H. R. Band, T. Barklow(SLAC National Accelerator Laboratory), J. M. Bauer(University of Mississippi), G. Bellodi(University of Oxford), Robert Berger(SLAC National Accelerator Laboratory), G. Blaylock(University of Massachusetts Amherst), J. R. Bogart(SLAC National Accelerator Laboratory), G. R. Bower(SLAC National Accelerator Laboratory), J. Brau(University of Oregon), M. Breidenbach(SLAC National Accelerator Laboratory), W. Bugg(University of Tennessee at Knoxville), D. L. Burke(SLAC National Accelerator Laboratory), T. H. Burnett(University of Washington), Philip Burrows(University of Oxford), A. Calcaterra(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati), R. Cassell(SLAC National Accelerator Laboratory), A. Chou(SLAC National Accelerator Laboratory), H.O. Cohn(University of Tennessee at Knoxville), J. A. Coller, M. R. Convery(SLAC National Accelerator Laboratory), V. Cook(University of Washington), R. F. Cowan(Massachusetts Institute of Technology), G. Crawford(SLAC National Accelerator Laboratory), Chris Damerell(Rutherford Appleton Laboratory), M. Daoudi(SLAC National Accelerator Laboratory), N. De Groot(University of Bristol), R. de Sangro(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati), D. Dong(SLAC National Accelerator Laboratory), M. Doser(SLAC National Accelerator Laboratory), R. D. DuBois(SLAC National Accelerator Laboratory), I. Erofeeva(Lomonosov Moscow State University), V. Eschenburg(University of Mississippi), E. Etzion(University of Wisconsin–Madison), S. Fahey(University of Colorado Boulder), D. Falciai(Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati), J. P. Fernández(University of California, Santa Cruz), K. T. Flood(University of Massachusetts Amherst), R. Frey(University of Oregon), E. L. Hart(University of Tennessee at Knoxville), K. Hasuko(Tohoku University), S. S. Hertzbach, M.E. Huffer(SLAC National Accelerator Laboratory), X. Huynh(SLAC National Accelerator Laboratory), M. Iwasaki(University of Oregon), D. J. Jackson(Rutherford Appleton Laboratory), P. Jacques(Rutgers, The State University of New Jersey), J. A. Jaros(SLAC National Accelerator Laboratory), Zuozhen Jiang(SLAC National Accelerator Laboratory), A. S. Johnson, J. R. Johnson(University of Wisconsin–Madison), R. Kajikawa(Nagoya University), M Kalelkar(Rutgers, The State University of New Jersey), Hongji Kang(Rutgers, The State University of New Jersey), R. Kofler(University of Massachusetts Amherst), R. Kroeger(University of Mississippi), M. Langston(University of Oregon), D. W. G. S. Leith(SLAC National Accelerator Laboratory), V. Lia(Massachusetts Institute of Technology), C. Lin(University of Massachusetts Amherst), G. Mancinelli(Rutgers, The State University of New Jersey), S. Manly(Yale University), G. Mantovani(Istituto Nazionale di Fisica Nucleare, Sezione di Perugia), T W Markiewicz, T. Maruyama, A. K. McKemey, R. Messner, K. C. Moffeit, T. B. Moore, M. Morii, D.R. Muller, V. Murzin(Lomonosov Moscow State University), S. Narita(Tohoku University), U. Nauenberg(University of Colorado Boulder), H. Neal, G. Nesom(University of Oxford), N. Oishi(Nagoya University), D. Onoprienko(University of Tennessee at Knoxville), L.S. Osborne, R. S. Panvini(Vanderbilt University), C H Park, I. M. Peruzzi, M. Piccolo, L. Piemontese, R J Plano, R. Prepost(University of Wisconsin–Madison), C. Y. Prescott, B. N. Ratcliff, J. Reidy(University of Mississippi), P. L. Reinertsen(University of California, Santa Cruz), L S Rochester, P. C. Rowson, J J Russell, O. H. Saxton, T. Schalk, B. A. Schumm, J. Schwiening, Victor Serbo, Gary Shapiro(Lawrence Berkeley National Laboratory), N. B. Sinev(University of Oregon), J. Snyder, H. Staengle, A. Stahl, P. Stamer, H. Steiner, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, F. Ë. Taylor, J. Thom, E. Torrence, T. Usher, J. Va’vra, R. Verdier, D.L. Wagner, A. P. Waite, S. Walston, A. W. Weidemann, Eric R. Weiss, J. S. Whitaker, S. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, J. L. Wittlin, M. Woods, T R Wright, R. K. Yamamoto, J. Yashima, S. Yellin(University of California, Santa Barbara), C. C. Young, H. Yuta
Cited by 41Open Access
Abstract
We present final measurements of the $Z$ boson-lepton coupling asymmetry parameters ${A}_{e}$, ${A}_{\ensuremath{\mu}}$, and ${A}_{\ensuremath{\tau}}$ with the complete sample of polarized $Z$ bosons collected by the SLD detector at the SLAC Linear Collider. From the left-right production and decay polar angle asymmetries in leptonic $Z$ decays we measure ${A}_{e}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.1544\ifmmode\pm\else\textpm\fi{}0.0060$, ${A}_{\ensuremath{\mu}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.142\ifmmode\pm\else\textpm\fi{}0.015$, and ${A}_{\ensuremath{\tau}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.136\ifmmode\pm\else\textpm\fi{}0.015$. Combined with our left-right asymmetry measured from hadronic decays, we find ${A}_{e}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.1516\ifmmode\pm\else\textpm\fi{}0.0021$. Assuming lepton universality, we obtain a combined effective weak mixing angle of ${sin}^{2}{\ensuremath{\theta}}_{W}^{\mathrm{eff}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.23098\ifmmode\pm\else\textpm\fi{}0.00026$.
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