Direct measurement of A(b) and A(c) at the Z(0) pole using a lepton tag

Authors
Abe, K Abe, K Abe, T Adam, I Akagi, T Allen, NJ Arodzero, A Ash, WW Aston, D Baird, KG Baltay, C Band, HR Barakat, MB Bardon, O Barklow, TL Bashindzhagyan, GL Bauer, JM Bellodi, G Ben-David, R Benvenuti, AC Bilei, GM Bisello, D Blaylock, G Bogart, JR Bolen, B Bower, GR Brau, JE Breidenbach, M Bugg, WM Burke, D Burnett, TH Burrows, PN Byrne, RM Calcaterra, A Calloway, D Camanzi, B Carpinelli, M Cassell, R Castaldi, R Castro, A Cavalli-Sforza, M Chou, A Church, E Cohn, HO Coller, JA Convery, MR Cook, V Cotton, R Cowan, RF Coyne, DG Crawford, G Damerell, CJS Danielson, MN Daoudi, M de Groot, N Dell'Orso, R Dervan, PJ de Sangro, R Dima, M D'Oliveira, A Dong, DN Doser, M Dubois, R Eisenstein, BI Eschenburg, V Etzion, E Fahey, S Falciai, D Fan, C Fernandez, JP Fero, MJ Flood, K Frey, R Gillman, T Gladding, G Gonzalez, S Goodman, ER Hart, EL Harton, JL Hasan, A Hasuko, K Hedges, SJ Hertzbach, SS Hildreth, MD Huber, J Huffer, ME Hughes, EW Huynh, X Hwang, H Iwasaki, M Jackson, DJ Jacques, P Jaros, JA Jiang, ZY Johnson, AS Johnson, JR Johnson, RA Junk, T Kajikawa, R Kalelkar, M Kamyshkov, Y Kang, HJ Karliner, I Kawahara, H Kim, YD King, R King, ME Kofler, RR Krishna, NM Kroeger, RS Langston, M Lath, A Leith, DWG Lia, V Lin, CJS Liu, X Liu, MX Loreti, M Lu, A Lynch, HL Ma, J Mahjouri, H Mancinelli, G Manly, S Mantovani, G Markiewicz, TW Maruyama, T Masuda, H Mazzucato, E McKemey, AK Meadows, BT Menegatti, G Messner, R Mockett, PM Moffeit, KC Moore, TB Morii, M Muller, D Murzin, V Nagamine, T Narita, S Nauenberg, U Neal, H Nussbaum, M Oishi, N Onoprienko, D Osborne, LS Panvini, RS Park, H Park, CH Pavel, TJ Peruzzi, I Piccolo, M Piemontese, L Pieroni, E Pitts, KT Plano, RJ Prepost, R Prescott, CY Punkar, GD Quigley, J Ratcliff, BN Reeves, TW Reidy, J Reinertsen, PL Rensing, PE Rochester, LS Rowson, PC Russell, JJ Saxton, OH Schalk, T Schindler, RH Schumm, BA Schwiening, J Sen, S Serbo, VV Shaevitz, MH Shank, JT Shapiro, G Sherden, DJ Shmakov, KD Simopoulos, C Sinev, NB Smith, SR Smy, MB Snyder, JA Staengle, H Stahl, A Stamer, P Steiner, R Steiner, H Strauss, MG Su, D Suekane, F Sugiyama, A Suzuki, S Swartz, M Szumilo, A Takahashi, T Taylor, FE Thom, J Torrence, E Toumbas, NK Usher, T Vannini, C Va'vra, J Vella, E Venuti, JP Verdier, R Verdini, PG Wagner, SR Wagner, DL Waite, AP Walston, S Wang, J Ward, C Watts, SJ Weidemann, AW Weiss, ER Whitaker, JS White, SL Wickens, FJ Williams, B Williams, DC Williams, SH Willocq, S Wilson, RJ Wisniewski, WJ Wittlin, JL Woods, M Word, GB Wright, TR Wyss, J Yamamoto, RK Yamartino, JH Yang, X Yashima, J Yellin, SJ Young, CC Yuta, H Zapalac, G Zdarko, RW Zhou, J
Citation
K. Abe et al., Direct measurement of A(b) and A(c) at the Z(0) pole using a lepton tag, PHYS REV L, 83(17), 1999, pp. 3384-3389
Citations number
24
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
17
Year of publication
1999
Pages
3384 - 3389
Database
ISI
SICI code
0031-9007(19991025)83:17<3384:DMOAAA>2.0.ZU;2-C
Abstract
The parity violation parameters A(b) and A(c) of the Zb (b) over bar and Zc (c) over bar couplings have been measured directly, using the polar angle dependence of the Z(0)-pole polarized cross sections. Bottom and charmed ha drons were tagged via semileptonic decays. Both the muon and electron ident ification algorithms take advantage of new multivariate techniques, incorpo rating for the first time information from the SLD Cerenkov Ring Imaging De tector. Based on the 1993-1995 SLD sample of 150 000 Z(0) decays produced w ith highly polarized electron beams, we measure A(b) = 0.910 +/- 0.068(stat ) +/- 0.037(syst), A(c) = 0.642 +/- 0.110(stat) +/- 0.063(syst).