Measurement of the charged multiplicity of Z0→bb̄ events

K. Abe; I. Abt; W. W. Ash; D. Aston; N. Bacchetta; K. G. Baird; C. Baltay; H. R. Band; M. B. Barakat; G. Baranko; O. Bardon; R. Battiston; A. O. Bazarko; A. Bean; R. J. Belcinski; R. Ben-David; A. C. Benvenuti; M. Biasini; T. Bienz; G. M. Bilei; D. Bisello; G. Blaylock; J. R. Bogart; T. Bolton; G. R. Bower; J. E. Brau; M. Breidenbach; W. M. Bugg; D. Burke; T. H. Burnett; P. N. Burrows; W. Busza; A. Calcaterra; D. O. Caldwell; D. Calloway; B. Camanzi; M. Carpinelli; J. Carr; R. Cassell; R. Castaldi; A. Castro; M. Cavalli-Sforza; G. B. Chadwick; L. Chen; E. Church; R. Claus; H. O. Cohn; J. A. Coller; V. Cook; R. Cotton; R. F. Cowan; P. A. Coyle; D. G. Coyne; A. D'Oliveira; C. J.S. Damerell; S. Dasu; R. De Sangro; P. De Simone; S. De Simone; R. Dell'Orso; P. Y.C. Du; R. Dubois; J. E. Duboscq; B. I. Eisentein; R. Elia; E. Erdos; C. Fan; B. Farhat; M. J. Fero; R. Frey; J. I. Friedman; K. Furuno; M. Gallinaro; A. Gillman; G. Gladding; S. Gonzalez; G. D. Hallewell; T. Hansl-Kozanecka; E. L. Hart; K. Hasegawa; Y. Hasegawa; S. Hedges; S. S. Hertzbach; M. D. Hildreth; D. G. Hitlin; A. Honma; J. Huber; M. E. Huffer; E. W. Hughes; H. Hwang; Y. Iwasaki; J. M. Izen; P. Jacques; A. S. Johnson; J. R. Johnson; R. A. Johnson; T. Junk; R. Kajikawa; M. Kalelkar; I. Karliner; H. Kawahara; M. H. Kelsey; H. W. Kendall; H. Y. Kim; M. E. King; R. King; R. R. Kofler; N. M. Krishna; R. S. Kroeger; Y. Kwon; J. F. Labs; M. Langston; A. Lath; J. A. Lauber; D. W.G. Leith; X. Liu; M. Loreti; A. Lu; H. L. Lynch; J. Ma; W. A. Majid; G. Mancinelli; S. Manly; G. Mantovani; T. W. Markiewicz; T. Maruyama; H. Masuda; E. Mazzucato; J. F. McGowan; S. McHugh; A. K. McKemey; B. T. Meadows; D. J. Mellor; R. Messner; P. M. Mockett; K. C. Moffeit; B. Mours; G. Müller; D. Muller; T. Nagamine; U. Nauenberg; H. Neal; M. Nussbaum; L. S. Osborne; R. S. Panvini; H. Park; M. Pauluzzi; T. J. Pavel; F. Perrier; I. Peruzzi; L. Pescara; M. Petradza; M. Piccolo; L. Piemontese; E. Pieroni; K. T. Pitts; R. J. Plano; R. Prepost; C. Y. Prescott; G. D. Punkar; J. Quigley; B. N. Ratcliff; T. W. Reeves; P. E. Rensing; J. D. Richman; L. S. Rochester; L. Rosenson; J. E. Rothberg; S. Rousakov; P. C. Rowson; J. J. Russell; P. Saez; O. H. Saxton; T. Schalk; R. H. Schindler; U. Schneekloth; D. Schultz; B. A. Schumm; A. Seiden; S. Sen; L. Servoli; M. H. Shaevitz; J. T. Shank; G. Shapiro; S. L. Shapiro; D. J. Sherden; R. L. Shypit; C. Simopoulos; S. R. Smith; J. A. Snyder; M. D. Sokoloff; P. Stamer; H. Steiner; R. Steiner; I. E. Stockdale; M. G. Strauss; D. Su; F. Suekane; A. Sugiyama; S. Suzuki; M. Swartz; A. Szumilo; T. Takahashi; F. E. Taylor; M. Tecchio; J. J. Thaler; N. Toge; E. Torrence; M. Turcotte; J. D. Turk; T. Usher; J. Va'vra; C. Vannini; E. Vella; J. P. Venuti; R. Verdier; P. G. Verdini; A. P. Waite; S. J. Watts; A. W. Weidemann; J. S. Whitaker; S. L. White; F. J. Wickens; D. A. Williams; D. C. Williams; S. H. Williams; S. Willocq; R. J. Wilson; W. J. Wisniewski; M. S. Witherell; M. Woods; G. B. Word; J. Wyss; R. K. Yamamoto; J. M. Yamartino; S. J. Yellin; C. C. Young; H. Yuta; G. Zapalac; R. W. Zdarko; C. Zeitlin; J. Zhou; M. Zolotorev; P. Zucchelli

doi:10.1103/PhysRevLett.72.3145

Measurement of the charged multiplicity of Z0→bb̄ events

K. Abe, I. Abt, W. W. Ash, D. Aston, N. Bacchetta, K. G. Baird, C. Baltay, H. R. Band, M. B. Barakat, G. Baranko, O. Bardon, R. Battiston, A. O. Bazarko, A. Bean, R. J. Belcinski, R. Ben-David, A. C. Benvenuti, M. Biasini, T. Bienz, G. M. BileiD. Bisello, G. Blaylock, J. R. Bogart, T. Bolton, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. Burke, T. H. Burnett, P. N. Burrows, W. Busza, A. Calcaterra, D. O. Caldwell, D. Calloway, B. Camanzi, M. Carpinelli, J. Carr, R. Cassell, R. Castaldi, A. Castro, M. Cavalli-Sforza, G. B. Chadwick, L. Chen, E. Church, R. Claus, H. O. Cohn, J. A. Coller, V. Cook, R. Cotton, R. F. Cowan, P. A. Coyle, D. G. Coyne, A. D'Oliveira, C. J.S. Damerell, S. Dasu, R. De Sangro, P. De Simone, S. De Simone, R. Dell'Orso, P. Y.C. Du, R. Dubois, J. E. Duboscq, B. I. Eisentein, R. Elia, E. Erdos, C. Fan, B. Farhat, M. J. Fero, R. Frey, J. I. Friedman, K. Furuno, M. Gallinaro, A. Gillman, G. Gladding, S. Gonzalez, G. D. Hallewell, T. Hansl-Kozanecka, E. L. Hart, K. Hasegawa, Y. Hasegawa, S. Hedges, S. S. Hertzbach, M. D. Hildreth, D. G. Hitlin, A. Honma, J. Huber, M. E. Huffer, E. W. Hughes, H. Hwang, Y. Iwasaki, J. M. Izen, P. Jacques, A. S. Johnson, J. R. Johnson, R. A. Johnson, T. Junk, R. Kajikawa, M. Kalelkar, I. Karliner, H. Kawahara, M. H. Kelsey, H. W. Kendall, H. Y. Kim, M. E. King, R. King, R. R. Kofler, N. M. Krishna, R. S. Kroeger, Y. Kwon, J. F. Labs, M. Langston, A. Lath, J. A. Lauber, D. W.G. Leith, X. Liu, M. Loreti, A. Lu, H. L. Lynch, J. Ma, W. A. Majid, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, H. Masuda, E. Mazzucato, J. F. McGowan, S. McHugh, A. K. McKemey, B. T. Meadows, D. J. Mellor, R. Messner, P. M. Mockett, K. C. Moffeit, B. Mours, G. Müller, D. Muller, T. Nagamine, U. Nauenberg, H. Neal, M. Nussbaum, L. S. Osborne, R. S. Panvini, H. Park, M. Pauluzzi, T. J. Pavel, F. Perrier, I. Peruzzi, L. Pescara, M. Petradza, M. Piccolo, L. Piemontese, E. Pieroni, K. T. Pitts, R. J. Plano, R. Prepost, C. Y. Prescott, G. D. Punkar, J. Quigley, B. N. Ratcliff, T. W. Reeves, P. E. Rensing, J. D. Richman, L. S. Rochester, L. Rosenson, J. E. Rothberg, S. Rousakov, P. C. Rowson, J. J. Russell, P. Saez, O. H. Saxton, T. Schalk, R. H. Schindler, U. Schneekloth, D. Schultz, B. A. Schumm, A. Seiden, S. Sen, L. Servoli, M. H. Shaevitz, J. T. Shank, G. Shapiro, S. L. Shapiro, D. J. Sherden, R. L. Shypit, C. Simopoulos, S. R. Smith, J. A. Snyder, M. D. Sokoloff, P. Stamer, H. Steiner, R. Steiner, I. E. Stockdale, M. G. Strauss, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, A. Szumilo, T. Takahashi, F. E. Taylor, M. Tecchio, J. J. Thaler, N. Toge, E. Torrence, M. Turcotte, J. D. Turk, T. Usher, J. Va'vra, C. Vannini, E. Vella, J. P. Venuti, R. Verdier, P. G. Verdini, A. P. Waite, S. J. Watts, A. W. Weidemann, J. S. Whitaker, S. L. White, F. J. Wickens, D. A. Williams, D. C. Williams, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, M. S. Witherell, M. Woods, G. B. Word, J. Wyss, R. K. Yamamoto, J. M. Yamartino, S. J. Yellin, C. C. Young, H. Yuta, G. Zapalac, R. W. Zdarko, C. Zeitlin, J. Zhou, M. Zolotorev, P. Zucchelli

Research output: Contribution to journal › Article › peer-review

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.

Original language	English (US)
Pages (from-to)	3145-3149
Number of pages	5
Journal	Physical review letters
Volume	72
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.72.3145
State	Published - 1994
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.72.3145

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Abe, K., Abt, I., Ash, W. W., Aston, D., Bacchetta, N., Baird, K. G., Baltay, C., Band, H. R., Barakat, M. B., Baranko, G., Bardon, O., Battiston, R., Bazarko, A. O., Bean, A., Belcinski, R. J., Ben-David, R., Benvenuti, A. C., Biasini, M., Bienz, T., ... Zucchelli, P. (1994). Measurement of the charged multiplicity of Z0→bb̄ events. Physical review letters, 72(20), 3145-3149. https://doi.org/10.1103/PhysRevLett.72.3145

Abe, K, Abt, I, Ash, WW, Aston, D, Bacchetta, N, Baird, KG, Baltay, C, Band, HR, Barakat, MB, Baranko, G, Bardon, O, Battiston, R, Bazarko, AO, Bean, A, Belcinski, RJ, Ben-David, R, Benvenuti, AC, Biasini, M, Bienz, T, Bilei, GM, Bisello, D, Blaylock, G, Bogart, JR, Bolton, T, Bower, GR, Brau, JE, Breidenbach, M, Bugg, WM, Burke, D, Burnett, TH, Burrows, PN, Busza, W, Calcaterra, A, Caldwell, DO, Calloway, D, Camanzi, B, Carpinelli, M, Carr, J, Cassell, R, Castaldi, R, Castro, A, Cavalli-Sforza, M, Chadwick, GB, Chen, L, Church, E, Claus, R, Cohn, HO, Coller, JA, Cook, V, Cotton, R, Cowan, RF, Coyle, PA, Coyne, DG, D'Oliveira, A, Damerell, CJS, Dasu, S, De Sangro, R, De Simone, P, De Simone, S, Dell'Orso, R, Du, PYC, Dubois, R, Duboscq, JE, Eisentein, BI, Elia, R, Erdos, E, Fan, C, Farhat, B, Fero, MJ, Frey, R, Friedman, JI, Furuno, K, Gallinaro, M, Gillman, A, Gladding, G, Gonzalez, S, Hallewell, GD, Hansl-Kozanecka, T, Hart, EL, Hasegawa, K, Hasegawa, Y, Hedges, S, Hertzbach, SS, Hildreth, MD, Hitlin, DG, Honma, A, Huber, J, Huffer, ME, Hughes, EW, Hwang, H, Iwasaki, Y, Izen, JM, Jacques, P, Johnson, AS, Johnson, JR, Johnson, RA, Junk, T, Kajikawa, R, Kalelkar, M, Karliner, I, Kawahara, H, Kelsey, MH, Kendall, HW, Kim, HY, King, ME, King, R, Kofler, RR, Krishna, NM, Kroeger, RS, Kwon, Y, Labs, JF, Langston, M, Lath, A, Lauber, JA, Leith, DWG, Liu, X, Loreti, M, Lu, A, Lynch, HL, Ma, J, Majid, WA, Mancinelli, G, Manly, S, Mantovani, G, Markiewicz, TW, Maruyama, T, Masuda, H, Mazzucato, E, McGowan, JF, McHugh, S, McKemey, AK, Meadows, BT, Mellor, DJ, Messner, R, Mockett, PM, Moffeit, KC, Mours, B, Müller, G, Muller, D, Nagamine, T, Nauenberg, U, Neal, H, Nussbaum, M, Osborne, LS, Panvini, RS, Park, H, Pauluzzi, M, Pavel, TJ, Perrier, F, Peruzzi, I, Pescara, L, Petradza, M, Piccolo, M, Piemontese, L, Pieroni, E, Pitts, KT, Plano, RJ, Prepost, R, Prescott, CY, Punkar, GD, Quigley, J, Ratcliff, BN, Reeves, TW, Rensing, PE, Richman, JD, Rochester, LS, Rosenson, L, Rothberg, JE, Rousakov, S, Rowson, PC, Russell, JJ, Saez, P, Saxton, OH, Schalk, T, Schindler, RH, Schneekloth, U, Schultz, D, Schumm, BA, Seiden, A, Sen, S, Servoli, L, Shaevitz, MH, Shank, JT, Shapiro, G, Shapiro, SL, Sherden, DJ, Shypit, RL, Simopoulos, C, Smith, SR, Snyder, JA, Sokoloff, MD, Stamer, P, Steiner, H, Steiner, R, Stockdale, IE, Strauss, MG, Su, D, Suekane, F, Sugiyama, A, Suzuki, S, Swartz, M, Szumilo, A, Takahashi, T, Taylor, FE, Tecchio, M, Thaler, JJ, Toge, N, Torrence, E, Turcotte, M, Turk, JD, Usher, T, Va'vra, J, Vannini, C, Vella, E, Venuti, JP, Verdier, R, Verdini, PG, Waite, AP, Watts, SJ, Weidemann, AW, Whitaker, JS, White, SL, Wickens, FJ, Williams, DA, Williams, DC, Williams, SH, Willocq, S, Wilson, RJ, Wisniewski, WJ, Witherell, MS, Woods, M, Word, GB, Wyss, J, Yamamoto, RK, Yamartino, JM, Yellin, SJ, Young, CC, Yuta, H, Zapalac, G, Zdarko, RW, Zeitlin, C, Zhou, J, Zolotorev, M & Zucchelli, P 1994, 'Measurement of the charged multiplicity of Z0→bb̄ events', Physical review letters, vol. 72, no. 20, pp. 3145-3149. https://doi.org/10.1103/PhysRevLett.72.3145

@article{0b3758bbff2b4a0d85e27274206bdce4,

title = "Measurement of the charged multiplicity of Z0→b{\=b} events",

abstract = "Using an impact parameter tag to select an enriched sample of Z0→b{\=b} events, we have measured the difference between the average charged multiplicity of Z0→b{\=b} and Z0→ hadrons to be {\=n}b-{\=n}had=2.24±0.30 (stat) ±0.33 (syst) tracks per event. From this, we have derived {\=n}b-{\=n}uds=3.31±0.41±0. 79. Comparing this measurement with those at lower center-of-mass energies, we find no evidence that {\=n}b-{\=n}uds 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.",

author = "K. Abe and I. Abt and Ash, {W. W.} and D. Aston and N. Bacchetta and Baird, {K. G.} and C. Baltay and Band, {H. R.} and Barakat, {M. B.} and G. Baranko and O. Bardon and R. Battiston and Bazarko, {A. O.} and A. Bean and Belcinski, {R. J.} and R. Ben-David and Benvenuti, {A. C.} and M. Biasini and T. Bienz and Bilei, {G. M.} and D. Bisello and G. Blaylock and Bogart, {J. R.} and T. Bolton and Bower, {G. R.} and Brau, {J. E.} and M. Breidenbach and Bugg, {W. M.} and D. Burke and Burnett, {T. H.} and Burrows, {P. N.} and W. Busza and A. Calcaterra and Caldwell, {D. O.} and D. Calloway and B. Camanzi and M. Carpinelli and J. Carr and R. Cassell and R. Castaldi and A. Castro and M. Cavalli-Sforza and Chadwick, {G. B.} and L. Chen and E. Church and R. Claus and Cohn, {H. O.} and Coller, {J. A.} and V. Cook and R. Cotton and Cowan, {R. F.} and Coyle, {P. A.} and Coyne, {D. G.} and A. D'Oliveira and Damerell, {C. J.S.} and S. Dasu and {De Sangro}, R. and {De Simone}, P. and {De Simone}, S. and R. Dell'Orso and Du, {P. Y.C.} and R. Dubois and Duboscq, {J. E.} and Eisentein, {B. I.} and R. Elia and E. Erdos and C. Fan and B. Farhat and Fero, {M. J.} and R. Frey and Friedman, {J. I.} and K. Furuno and M. Gallinaro and A. Gillman and G. Gladding and S. Gonzalez and Hallewell, {G. D.} and T. Hansl-Kozanecka and Hart, {E. L.} and K. Hasegawa and Y. Hasegawa and S. Hedges and Hertzbach, {S. S.} and Hildreth, {M. D.} and Hitlin, {D. G.} and A. Honma and J. Huber and Huffer, {M. E.} and Hughes, {E. W.} and H. Hwang and Y. Iwasaki and Izen, {J. M.} and P. Jacques and Johnson, {A. S.} and Johnson, {J. R.} and Johnson, {R. A.} and T. Junk and R. Kajikawa and M. Kalelkar and I. Karliner and H. Kawahara and Kelsey, {M. H.} and Kendall, {H. W.} and Kim, {H. Y.} and King, {M. E.} and R. King and Kofler, {R. R.} and Krishna, {N. M.} and Kroeger, {R. S.} and Y. Kwon and Labs, {J. F.} and M. Langston and A. Lath and Lauber, {J. A.} and Leith, {D. W.G.} and X. Liu and M. Loreti and A. Lu and Lynch, {H. L.} and J. Ma and Majid, {W. A.} and G. Mancinelli and S. Manly and G. Mantovani and Markiewicz, {T. W.} and T. Maruyama and H. Masuda and E. Mazzucato and McGowan, {J. F.} and S. McHugh and McKemey, {A. K.} and Meadows, {B. T.} and Mellor, {D. J.} and R. Messner and Mockett, {P. M.} and Moffeit, {K. C.} and B. Mours and G. M{\"u}ller and D. Muller and T. Nagamine and U. Nauenberg and H. Neal and M. Nussbaum and Osborne, {L. S.} and Panvini, {R. S.} and H. Park and M. Pauluzzi and Pavel, {T. J.} and F. Perrier and I. Peruzzi and L. Pescara and M. Petradza and M. Piccolo and L. Piemontese and E. Pieroni and Pitts, {K. T.} and Plano, {R. J.} and R. Prepost and Prescott, {C. Y.} and Punkar, {G. D.} and J. Quigley and Ratcliff, {B. N.} and Reeves, {T. W.} and Rensing, {P. E.} and Richman, {J. D.} and Rochester, {L. S.} and L. Rosenson and Rothberg, {J. E.} and S. Rousakov and Rowson, {P. C.} and Russell, {J. J.} and P. Saez and Saxton, {O. H.} and T. Schalk and Schindler, {R. H.} and U. Schneekloth and D. Schultz and Schumm, {B. A.} and A. Seiden and S. Sen and L. Servoli and Shaevitz, {M. H.} and Shank, {J. T.} and G. Shapiro and Shapiro, {S. L.} and Sherden, {D. J.} and Shypit, {R. L.} and C. Simopoulos and Smith, {S. R.} and Snyder, {J. A.} and Sokoloff, {M. D.} and P. Stamer and H. Steiner and R. Steiner and Stockdale, {I. E.} and Strauss, {M. G.} and D. Su and F. Suekane and A. Sugiyama and S. Suzuki and M. Swartz and A. Szumilo and T. Takahashi and Taylor, {F. E.} and M. Tecchio and Thaler, {J. J.} and N. Toge and E. Torrence and M. Turcotte and Turk, {J. D.} and T. Usher and J. Va'vra and C. Vannini and E. Vella and Venuti, {J. P.} and R. Verdier and Verdini, {P. G.} and Waite, {A. P.} and Watts, {S. J.} and Weidemann, {A. W.} and Whitaker, {J. S.} and White, {S. L.} and Wickens, {F. J.} and Williams, {D. A.} and Williams, {D. C.} and Williams, {S. H.} and S. Willocq and Wilson, {R. J.} and Wisniewski, {W. J.} and Witherell, {M. S.} and M. Woods and Word, {G. B.} and J. Wyss and Yamamoto, {R. K.} and Yamartino, {J. M.} and Yellin, {S. J.} and Young, {C. C.} and H. Yuta and G. Zapalac and Zdarko, {R. W.} and C. Zeitlin and J. Zhou and M. Zolotorev and P. Zucchelli",

year = "1994",

doi = "10.1103/PhysRevLett.72.3145",

language = "English (US)",

volume = "72",

pages = "3145--3149",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "20",

}

TY - JOUR

T1 - Measurement of the charged multiplicity of Z0→bb̄ events

AU - Abe, K.

AU - Abt, I.

AU - Ash, W. W.

AU - Aston, D.

AU - Bacchetta, N.

AU - Baird, K. G.

AU - Baltay, C.

AU - Band, H. R.

AU - Barakat, M. B.

AU - Baranko, G.

AU - Bardon, O.

AU - Battiston, R.

AU - Bazarko, A. O.

AU - Bean, A.

AU - Belcinski, R. J.

AU - Ben-David, R.

AU - Benvenuti, A. C.

AU - Biasini, M.

AU - Bienz, T.

AU - Bilei, G. M.

AU - Bisello, D.

AU - Blaylock, G.

AU - Bogart, J. R.

AU - Bolton, T.

AU - Bower, G. R.

AU - Brau, J. E.

AU - Breidenbach, M.

AU - Bugg, W. M.

AU - Burke, D.

AU - Burnett, T. H.

AU - Burrows, P. N.

AU - Busza, W.

AU - Calcaterra, A.

AU - Caldwell, D. O.

AU - Calloway, D.

AU - Camanzi, B.

AU - Carpinelli, M.

AU - Carr, J.

AU - Cassell, R.

AU - Castaldi, R.

AU - Castro, A.

AU - Cavalli-Sforza, M.

AU - Chadwick, G. B.

AU - Chen, L.

AU - Church, E.

AU - Claus, R.

AU - Cohn, H. O.

AU - Coller, J. A.

AU - Cook, V.

AU - Cotton, R.

AU - Cowan, R. F.

AU - Coyle, P. A.

AU - Coyne, D. G.

AU - D'Oliveira, A.

AU - Damerell, C. J.S.

AU - Dasu, S.

AU - De Sangro, R.

AU - De Simone, P.

AU - De Simone, S.

AU - Dell'Orso, R.

AU - Du, P. Y.C.

AU - Dubois, R.

AU - Duboscq, J. E.

AU - Eisentein, B. I.

AU - Elia, R.

AU - Erdos, E.

AU - Fan, C.

AU - Farhat, B.

AU - Fero, M. J.

AU - Frey, R.

AU - Friedman, J. I.

AU - Furuno, K.

AU - Gallinaro, M.

AU - Gillman, A.

AU - Gladding, G.

AU - Gonzalez, S.

AU - Hallewell, G. D.

AU - Hansl-Kozanecka, T.

AU - Hart, E. L.

AU - Hasegawa, K.

AU - Hasegawa, Y.

AU - Hedges, S.

AU - Hertzbach, S. S.

AU - Hildreth, M. D.

AU - Hitlin, D. G.

AU - Honma, A.

AU - Huber, J.

AU - Huffer, M. E.

AU - Hughes, E. W.

AU - Hwang, H.

AU - Iwasaki, Y.

AU - Izen, J. M.

AU - Jacques, P.

AU - Johnson, A. S.

AU - Johnson, J. R.

AU - Johnson, R. A.

AU - Junk, T.

AU - Kajikawa, R.

AU - Kalelkar, M.

AU - Karliner, I.

AU - Kawahara, H.

AU - Kelsey, M. H.

AU - Kendall, H. W.

AU - Kim, H. Y.

AU - King, M. E.

AU - King, R.

AU - Kofler, R. R.

AU - Krishna, N. M.

AU - Kroeger, R. S.

AU - Kwon, Y.

AU - Labs, J. F.

AU - Langston, M.

AU - Lath, A.

AU - Lauber, J. A.

AU - Leith, D. W.G.

AU - Liu, X.

AU - Loreti, M.

AU - Lu, A.

AU - Lynch, H. L.

AU - Ma, J.

AU - Majid, W. A.

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PY - 1994

Y1 - 1994

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=4243681874&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4243681874&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.72.3145

DO - 10.1103/PhysRevLett.72.3145

M3 - Article

C2 - 10056119

AN - SCOPUS:4243681874

SN - 0031-9007

VL - 72

SP - 3145

EP - 3149

JO - Physical Review Letters

JF - Physical Review Letters

IS - 20

ER -

Measurement of the charged multiplicity of Z0→bb̄ events

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