A precise measurement of the partial decay width ratio Rb0 = Γbb̄/Γhad

Abreu, P; Adam, W; Adye, T; Adzic, P; Albrecht, Z; Alderweireld, T; Alekseev, GD; Alemany, R; Allmendinger, T; Allport, PP; Almehed, S; Amaldi, U; Amato, S; Anassontzis, EG; Andersson, P; Andreazza, A; Andringa, S; Antilogus, P; Apel, W-D; Arnoud, Y; Åsman, B; Augustin, J-E; Augustinus, A; Baillon, P; Bambade, P; Barao, F; Barbiellini, G; Barbier, R; Bardin, DY; Barker, G; Baroncelli, A; Battaglia, M; Baubillier, M; Becks, K-H; Begalli, M; Beilliere, P; Belokopytov, Y; Belous, K; Benvenuti, AC; Berat, C; Berggren, M; Bertini, D; Bertrand, D; Besancon, M; Bianchi, F; Bigi, M; Bilenky, MS; Bizouard, M-A; Bloch, D; Blom, HM; Bonesini, M; Bonivento, W; Boonekamp, M; Booth, PSL; Borgland, AW; Borisov, G; Bosio, C; Botner, O; Boudinov, E; Bouquet, B; Bourdarios, C; Bowcock, TJV; Boyko, I; Bozovic, I; Bozzo, M; Branchini, P; Brenke, T; Brenner, RA; Bruckman, P; Brunet, J-M; Bugge, L; Buran, T; Burgsmueller, T; Buschmann, P; Cabrera, S; Caccia, M; Calvi, M; Camporesi, T; Canale, V; Carena, F; 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van Doninck, WK; van Eldik, J; van Lysebetten, A; van Vulpen, I; Vassilopoulos, N; Vegni, G; Ventura, L; Venus, W; Verbeure, F; Verlato, M; Vertogradov, LS; Verzi, V; Vilanova, D; Vitale, L; Vlasov, E; Vodopyanov, AS; Vollmer, C; Voulgaris, G; Vrba, V; Wahlen, H; Walck, C; Weiser, C; Wicke, D; Wickens, JH; Wilkinson, GR; Winter, M; Witek, M; Wolf, G; Yi, J; Yushchenko, O; Zaitsev, A; Zalewska, A; Zalewski, P; Zavrtanik, D; Zevgolatakos, E; Zimin, NI; Zucchelli, GC; Zumerle, G

Abstract:

The partial decay width of the Z to bb̄ quark pairs has been measured by the DELPHI detector at LEP using data taken in the years 1992 to 1995. Decays of b-hadrons were tagged by several methods using tracks with large impact parameters and/or reconstructed secondary vertices, complemented by event shape variables. Combining these methods in a multivariate analysis the value Γ(Z → bb̄)/Γ(Z → had) = 0.21634 ± 0.00067 (stat) ± 0.00060 (syst) was obtained, where the cc̄ production fraction was fixed to its Standard Model value.

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APA Style

Abreu, P., Adam, W., Adye, T., Adzic, P., Albrecht, Z., Alderweireld, T., Alekseev, G. D., Alemany, R., Allmendinger, T., Allport, P. P., Almehed, S., Amaldi, U., Amato, S., Anassontzis, E. G., Andersson, P., Andreazza, A., Andringa, S., Antilogus, P., Apel, W.-D., … Zumerle, G. (1999). A precise measurement of the partial decay width ratio Rb0 = Γbb̄/Γhad. European Physical Journal C, 10(3), 415–442.

MLA Style

Abreu, P., et al. “A Precise Measurement of the Partial Decay Width Ratio Rb0 = Γbb̄/Γhad.” European Physical Journal C, vol. 10, no. 3, 1999, pp. 415–42.

Chicago Style

Abreu, P, W Adam, T Adye, P Adzic, Z Albrecht, T Alderweireld, GD Alekseev, et al. 1999. “A Precise Measurement of the Partial Decay Width Ratio Rb0 = Γbb̄/Γhad.” European Physical Journal C 10 (3): 415–42.
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