Improved direct measurement of leptonic coupling asymmetries with polarized Z bosons

Authors
Abe, K Abe, K Abe, T Adam, I Akimoto, H Aston, D Baird, KG Baltay, C Band, HR Barklow, TL Bauer, JM Bellodi, G Berger, R Blaylock, G Bogart, JR Bower, GR Brau, JE Breidenbach, M Bugg, WM Burke, D Burnett, TH Burrows, PN Calcaterra, A Cassell, R Chou, A Cohn, HO Coller, JA Convery, MR Cook, V Cowan, RF Crawford, G Damerell, CJS Daoudi, M de Groot, N de Sangro, R Dong, DN Doser, M Dubois, R Erofeeva, I Eschenburg, V Etzion, E Fahey, S Falciai, D Fernandez, JP Flood, K Frey, R Hart, EL Hasuko, K Hertzbach, SS Huffer, ME Huynh, X Iwasaki, M Jackson, DJ Jacques, P Jaros, JA Jiang, ZY Johnson, AS Johnson, JR Kajikawa, R Kalelkar, M Kang, HJ Kofler, RR Kroeger, RS Langston, M Leith, DWG Lia, V Lin, C Mancinelli, G Manly, S Mantovani, G Markiewicz, TW Maruyama, T McKemey, AK Messner, R Moffeit, KC Moore, TB Morii, M Muller, D Murzin, V Narita, S Nauenberg, U Neal, H Nesom, G Oishi, N Onoprienko, D Osborne, LS Panvini, RS Park, CH Peruzzi, I Piccolo, M Piemontese, L Plano, RJ Prepost, R Prescott, CY Ratcliff, BN Reidy, J Reinertsen, PL Rochester, LS Rowson, PC Russell, JJ Saxton, OH Schalk, T Schumm, BA Schwiening, J Serbo, VV Shapiro, G Sinev, NB Snyder, JA Staengle, H Stahl, A Stamer, P Steiner, H Su, D Suekane, F Sugiyama, A Suzuki, S Swartz, M Taylor, FE Thom, J Torrence, E Usher, T Va'vra, J Verdier, R Wagner, DL Waite, AP Walston, S Weidemann, AW Weiss, ER Whitaker, JS Williams, SH Willocq, S Wilson, RJ Wisniewski, WJ Wittlin, JL Woods, M Wright, TR Yamamoto, RK Yashima, J Yellin, SJ Young, CC Yuta, H
Citation
K. Abe et al., Improved direct measurement of leptonic coupling asymmetries with polarized Z bosons, PHYS REV L, 86(7), 2001, pp. 1162-1166
Citations number
26
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
86
Issue
7
Year of publication
2001
Pages
1162 - 1166
Database
ISI
SICI code
0031-9007(20010212)86:7<1162:IDMOLC>2.0.ZU;2-Q
Abstract
We present final measurements of the Z boson-lepton coupling asymmetry para meters A(e), A(mu), and A(tau) with the complete sample of polarized Z boso ns collected by the SLD detector at the SLAG Linear Collider. From the left -right production and decay polar angle asymmetries in leptonic Z decays we measure A(e) = 0.1544 +/- 0.0060, A(mu) = 0.142 +/- 0.015, and A(tau) = 0. 136 +/- 0.015. Combined with our left- right asymmetry measured from hadron ic decays, we find A(e) = 0.1516 +/- 0.0021. Assuming lepton universality, we obtain a combined effective weak mixing angle of sin(2)theta (eff)(W) = 0.230 98 +/- 0.000 26.