Improved measurement of the probability for gluon splitting into b(b)over-bar in Z(0) decays

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 measurement of the probability for gluon splitting into b(b)over-bar in Z(0) decays, PHYS LETT B, 507(1-4), 2001, pp. 61-69
Citations number
34
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
03702693 → ACNP
Volume
507
Issue
1-4
Year of publication
2001
Pages
61 - 69
Database
ISI
SICI code
0370-2693(20010517)507:1-4<61:IMOTPF>2.0.ZU;2-Y
Abstract
We have measured gluon splitting into bottom quarks, g --> b (b) over bar, in hadronic Z(0) decays collected by SLD between 1996 and 1998. The analysi s was performed by looking for secondary bottom production in 4-jet events of any primary flavor. 4-jet events were identified. and in each event a to pological vertex-mass technique was applied to the two jets closest in angl e in order to identify them as b or b;jets. The upgraded CCD-based vertex d etector gives very high B-tagging efficiency, especially for B hadrons with the low energies typical of this process. We measured the rate of g --> b (b) over bar production per hadronic event, g(b (b) over bar), to be (2.44 +/- 0.59(stat.) +/- 0.34(syst.)) x 10(-3). (C) 2001 Elsevier Science B.V. A ll rights reserved.