Using an impact parameter tag to select an enriched sample of Z0→bb̄ events, we have measured the difference between the average charged multiplicity of Z0→bb̄ and Z0→ hadrons to be n̄b-n̄had=2.24±0.30 (stat) ±0.33 (syst) tracks per event. From this, we have derived n̄b-n̄uds=3.31±0.41±0. 79. Comparing this measurement with those at lower center-of-mass energies, we find no evidence that n̄b-n̄uds depends on energy. This result is in agreement with a precise prediction of perturbative QCD, and supports the notion that QCD remains asymptotically free down to the scale Mb2.

Abe, K., Abt, I., Ash, W., Aston, D., Bacchetta, N., Baird, K., et al. (1994). Measurement of the charged multiplicity of Z0→bb̄ events. PHYSICAL REVIEW LETTERS, 72(20), 3145-3149 [10.1103/PhysRevLett.72.3145].

Measurement of the charged multiplicity of Z0→bb̄ events

CARPINELLI, Massimo;
1994

Abstract

Using an impact parameter tag to select an enriched sample of Z0→bb̄ events, we have measured the difference between the average charged multiplicity of Z0→bb̄ and Z0→ hadrons to be n̄b-n̄had=2.24±0.30 (stat) ±0.33 (syst) tracks per event. From this, we have derived n̄b-n̄uds=3.31±0.41±0. 79. Comparing this measurement with those at lower center-of-mass energies, we find no evidence that n̄b-n̄uds depends on energy. This result is in agreement with a precise prediction of perturbative QCD, and supports the notion that QCD remains asymptotically free down to the scale Mb2.
Articolo in rivista - Articolo scientifico
HADRONIC DECAYS; JETS; Z0;
English
3145
3149
5
Abe, K., Abt, I., Ash, W., Aston, D., Bacchetta, N., Baird, K., et al. (1994). Measurement of the charged multiplicity of Z0→bb̄ events. PHYSICAL REVIEW LETTERS, 72(20), 3145-3149 [10.1103/PhysRevLett.72.3145].
Abe, K; Abt, I; Ash, W; Aston, D; Bacchetta, N; Baird, K; Baltay, C; Band, H; Barakat, M; Baranko, G; Bardon, O; Battiston, R; Bazarko, A; Bean, A; Belcinski, R; Bendavid, R; Benvenuti, A; Biasini, M; Bienz, T; Bilei, G; Bisello, D; Blaylock, G; Bogart, J; Bolton, T; Bower, G; Brau, J; Breidenbach, M; Bugg, W; Burke, D; Burnett, T; Burrows, P; Busza, W; Calcaterra, A; Caldwell, D; Calloway, D; Camanzi, B; Carpinelli, M; Carr, J; Cassell, R; Castaldi, R; Castro, A; Cavallisforza, M; Chadwick, G; Chen, L; Church, E; Claus, R; Cohn, H; Coller, J; Cook, V; Cotton, R; Cowan, R; Coyle, P; Coyne, D; Doliveira, A; Damerell, C; Dasu, S; Desangro, R; Desimone, P; Desimone, S; Dellorso, R; Du, P; Dubois, R; Duboscq, J; Eisentein, B; Elia, R; Erdos, E; Fan, C; Farhat, B; Fero, M; Frey, R; Friedman, J; Furuno, K; Gallinaro, M; Gillman, A; Gladding, G; Gonzalez, S; Hallewell, G; Hanslkozanecka, T; Hart, E; Hasegawa, K; Hasegawa, Y; Hedges, S; Hertzbach, S; Hildreth, M; Hitlin, D; Honma, A; Huber, J; Huffer, M; Hughes, E; Hwang, H; Iwasaki, Y; Izen, J; Jacques, P; Johnson, A; Johnson, J; Johnson, R; Junk, T; Kajikawa, R; Kalelkar, M; Karliner, I; Kawahara, H; Kelsey, M; Kendall, H; Kim, H; King, M; King, R; Kofler, R; Krishna, N; Kroeger, R; Kwon, Y; Labs, J; Langston, M; Lath, A; Lauber, J; Leith, D; Liu, X; Loreti, M; Lu, A; Lynch, H; Ma, J; Majid, W; Mancinelli, G; Manly, S; Mantovani, G; Markiewicz, T; Maruyama, T; Masuda, H; Mazzucato, E; Mcgowan, J; Mchugh, S; Mckemey, A; Meadows, B; Mellor, D; Messner, R; Mockett, P; Moffeit, K; Mours, B; Muller, G; Muller, D; Nagamine, T; Nauenberg, U; Neal, H; Nussbaum, M; Osborne, L; Panvini, R; Park, H; Pauluzzi, M; Pavel, T; Perrier, F; Peruzzi, I; Pescara, L; Petradza, M; Piccolo, M; Piemontese, L; Pieroni, E; Pitts, K; Plano, R; Prepost, R; Prescott, C; Punkar, G; Quigley, J; Ratcliff, B; Reeves, T; Rensing, P; Richman, J; Rochester, L; Rosenson, L; Rothberg, J; Rousakov, S; Rowson, P; Russell, J; Saez, P; Saxton, O; Schalk, T; Schindler, R; Schneekloth, U; Schultz, D; Schumm, B; Seiden, A; Sen, S; Servoli, L; Shaevitz, M; Shank, J; Shapiro, G; Shapiro, S; Sherden, D; Shypit, R; Simopoulos, C; Smith, S; Snyder, J; Sokoloff, M; Stamer, P; Steiner, H; Steiner, R; Stockdale, I; Strauss, M; Su, D; Suekane, F; Sugiyama, A; Suzuki, S; Swartz, M; Szumilo, A; Takahashi, T; Taylor, F; Tecchio, M; Thaler, J; Toge, N; Torrence, E; Turcotte, M; Turk, J; Usher, T; Vavra, J; Vannini, C; Vella, E; Venuti, J; Verdier, R; Verdini, P; Wagner, S; Waite, A; Watts, S; Weidemann, A; Whitaker, J; White, S; Wickens, F; Williams, D; Williams, D; Williams, S; Willocq, S; Wilson, R; Wisniewski, W; Witherell, M; Woods, M; Word, G; Wyss, J; Yamamoto, R; Yamartino, J; Yellin, S; Young, C; Yuta, H; Zapalac, G; Zdarko, R; Zeitlin, C; Zhou, J; Zolotorev, M; Zucchelli, P
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