Heavy flavour production and decay with prompt leptons in the ALEPH detector

D. Buskulic; D. Casper; I. De Bonis; D. Decamp; P. Ghez; C. Goy; J. P. Lees; M. N. Minard; P. Odier; B. Pietrzyk; F. Ariztizabal; P. Comas; J. M. Crespo; I. Efthymiopoulos; E. Fernandez; M. Fernandez-Bosman; V. Gaitan; Ll Garrido; M. Martinez; T. Mattison; S. Ortreu; A. Pacheco; C. Padilla; A. Pascual; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; N. Marinelli; S. Natali; S. Nuzzo; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Chai; D. Huang; X. Huang; J. Lin; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; L. Zhang; W. Zhao; G. Bonvicini; J. Boudreau; H. Drevermann; R. W. Forty; G. Ganis; C. Gay; M. Girone; R. Hagelberg; J. Harvey; J. Hilgart; R. Jacobsen; B. Jost; J. Knobloch; I. Lehraus; M. Maggi; C. Markou; P. Mato; H. Meinhard; A. Minten; R. Miquel; P. Palazzi; J. R. Pater; J. A. Perlas; P. Perrodo; J. F. Pusztaszeri; F. Ranjard; L. Rolandi; J. Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; F. Sefkow; W. Tejessy; I. R. Tomalin; R. Veenhof; H. Wachsmuth; S. Wasserbaech; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Barres; C. Boyer; A. Falvard; P. Gay; C. Guicheney

doi:10.1007/BF01560237

Heavy flavour production and decay with prompt leptons in the ALEPH detector

D. Buskulic, D. Casper, I. De Bonis, D. Decamp, P. Ghez, C. Goy, J. P. Lees, M. N. Minard, P. Odier, B. Pietrzyk, F. Ariztizabal, P. Comas, J. M. Crespo, I. Efthymiopoulos, E. Fernandez, M. Fernandez-Bosman, V. Gaitan, Ll Garrido, M. Martinez, T. MattisonS. Ortreu, A. Pacheco, C. Padilla, A. Pascual, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, N. Marinelli, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chai, D. Huang, X. Huang, J. Lin, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, L. Zhang, W. Zhao, G. Bonvicini, J. Boudreau, H. Drevermann, R. W. Forty, G. Ganis, C. Gay, M. Girone, R. Hagelberg, J. Harvey, J. Hilgart, R. Jacobsen, B. Jost, J. Knobloch, I. Lehraus, M. Maggi, C. Markou, P. Mato, H. Meinhard, A. Minten, R. Miquel, P. Palazzi, J. R. Pater, J. A. Perlas, P. Perrodo, J. F. Pusztaszeri, F. Ranjard, L. Rolandi, J. Rothberg, T. Ruan, M. Saich, D. Schlatter, M. Schmelling, F. Sefkow, W. Tejessy, I. R. Tomalin, R. Veenhof, H. Wachsmuth, S. Wasserbaech, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Barres, C. Boyer, A. Falvard, P. Gay, C. Guicheney

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Abstract

In 431 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of electrons and muons in events with one or more prompt leptons have been analysed to give information on the production and decay of heavy quarks. The fractions of {Mathematical expression} and {Mathematical expression} events are measured to be 0.219±0.006±0.005 and 0.165±0.005±0.020, and the corresponding forward-backward asymmetries at the Z mass are measured to be 0.090±0.013±0.003 and 0.111±0.021±0.018, after QED and QCD corrections. Measurements for the semileptonic branching ratios BR {Mathematical expression} and BR (b→cℓ+vX) yield 0.114±0.003±0.004 and 0.082±0.003±0.012, respectively. The dilepton events enable measurement of the b mixing parameter, Χ=0.114±0.014±0.008. Results are also presented for the energy variation of the {Mathematical expression} asymmetry and the parameters required to describe heavy quark fragmentation. From the asymmetry measurements, the effective electroweak mixing angle is sin2θWeff=0.2333±0.0022. © 1994 Springer-Verlag.

Original language	English
Pages (from-to)	179-198
Journal	Zeitschrift fur Physik C-Particles and Fields
Volume	62
Issue number	2
DOIs	https://doi.org/10.1007/BF01560237
Publication status	Published - 1 Jan 1994

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10.1007/BF01560237

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Buskulic, D., Casper, D., De Bonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J. P., Minard, M. N., Odier, P., Pietrzyk, B., Ariztizabal, F., Comas, P., Crespo, J. M., Efthymiopoulos, I., Fernandez, E., Fernandez-Bosman, M., Gaitan, V., Garrido, L., Martinez, M., ... Guicheney, C. (1994). Heavy flavour production and decay with prompt leptons in the ALEPH detector. Zeitschrift fur Physik C-Particles and Fields, 62(2), 179-198. https://doi.org/10.1007/BF01560237

@article{079eaad12ebe47ea9c8fff8638332a17,

title = "Heavy flavour production and decay with prompt leptons in the ALEPH detector",

abstract = "In 431 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of electrons and muons in events with one or more prompt leptons have been analysed to give information on the production and decay of heavy quarks. The fractions of {Mathematical expression} and {Mathematical expression} events are measured to be 0.219±0.006±0.005 and 0.165±0.005±0.020, and the corresponding forward-backward asymmetries at the Z mass are measured to be 0.090±0.013±0.003 and 0.111±0.021±0.018, after QED and QCD corrections. Measurements for the semileptonic branching ratios BR {Mathematical expression} and BR (b→cℓ+vX) yield 0.114±0.003±0.004 and 0.082±0.003±0.012, respectively. The dilepton events enable measurement of the b mixing parameter, Χ=0.114±0.014±0.008. Results are also presented for the energy variation of the {Mathematical expression} asymmetry and the parameters required to describe heavy quark fragmentation. From the asymmetry measurements, the effective electroweak mixing angle is sin2θWeff=0.2333±0.0022. {\textcopyright} 1994 Springer-Verlag.",

author = "D. Buskulic and D. Casper and {De Bonis}, I. and D. Decamp and P. Ghez and C. Goy and Lees, {J. P.} and Minard, {M. N.} and P. Odier and B. Pietrzyk and F. Ariztizabal and P. Comas and Crespo, {J. M.} and I. Efthymiopoulos and E. Fernandez and M. Fernandez-Bosman and V. Gaitan and Ll Garrido and M. Martinez and T. Mattison and S. Ortreu and A. Pacheco and C. Padilla and A. Pascual and D. Creanza and {de Palma}, M. and A. Farilla and G. Iaselli and G. Maggi and N. Marinelli and S. Natali and S. Nuzzo and A. Ranieri and G. Raso and F. Romano and F. Ruggieri and G. Selvaggi and L. Silvestris and P. Tempesta and G. Zito and Y. Chai and D. Huang and X. Huang and J. Lin and T. Wang and Y. Xie and D. Xu and R. Xu and J. Zhang and L. Zhang and W. Zhao and G. Bonvicini and J. Boudreau and H. Drevermann and Forty, {R. W.} and G. Ganis and C. Gay and M. Girone and R. Hagelberg and J. Harvey and J. Hilgart and R. Jacobsen and B. Jost and J. Knobloch and I. Lehraus and M. Maggi and C. Markou and P. Mato and H. Meinhard and A. Minten and R. Miquel and P. Palazzi and Pater, {J. R.} and Perlas, {J. A.} and P. Perrodo and Pusztaszeri, {J. F.} and F. Ranjard and L. Rolandi and J. Rothberg and T. Ruan and M. Saich and D. Schlatter and M. Schmelling and F. Sefkow and W. Tejessy and Tomalin, {I. R.} and R. Veenhof and H. Wachsmuth and S. Wasserbaech and W. Wiedenmann and T. Wildish and W. Witzeling and J. Wotschack and Z. Ajaltouni and M. Bardadin-Otwinowska and A. Barres and C. Boyer and A. Falvard and P. Gay and C. Guicheney",

year = "1994",

month = jan,

day = "1",

doi = "10.1007/BF01560237",

language = "English",

volume = "62",

pages = "179--198",

number = "2",

}

Buskulic, D, Casper, D, De Bonis, I, Decamp, D, Ghez, P, Goy, C, Lees, JP, Minard, MN, Odier, P, Pietrzyk, B, Ariztizabal, F, Comas, P, Crespo, JM, Efthymiopoulos, I, Fernandez, E, Fernandez-Bosman, M, Gaitan, V, Garrido, L, Martinez, M, Mattison, T, Ortreu, S, Pacheco, A, Padilla, C, Pascual, A, Creanza, D, de Palma, M, Farilla, A, Iaselli, G, Maggi, G, Marinelli, N, Natali, S, Nuzzo, S, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Chai, Y, Huang, D, Huang, X, Lin, J, Wang, T, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhang, L, Zhao, W, Bonvicini, G, Boudreau, J, Drevermann, H, Forty, RW, Ganis, G, Gay, C, Girone, M, Hagelberg, R, Harvey, J, Hilgart, J, Jacobsen, R, Jost, B, Knobloch, J, Lehraus, I, Maggi, M, Markou, C, Mato, P, Meinhard, H, Minten, A, Miquel, R, Palazzi, P, Pater, JR, Perlas, JA, Perrodo, P, Pusztaszeri, JF, Ranjard, F, Rolandi, L, Rothberg, J, Ruan, T, Saich, M, Schlatter, D, Schmelling, M, Sefkow, F, Tejessy, W, Tomalin, IR, Veenhof, R, Wachsmuth, H, Wasserbaech, S, Wiedenmann, W, Wildish, T, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadin-Otwinowska, M, Barres, A, Boyer, C, Falvard, A, Gay, P & Guicheney, C 1994, 'Heavy flavour production and decay with prompt leptons in the ALEPH detector', Zeitschrift fur Physik C-Particles and Fields, vol. 62, no. 2, pp. 179-198. https://doi.org/10.1007/BF01560237

TY - JOUR

T1 - Heavy flavour production and decay with prompt leptons in the ALEPH detector

AU - Buskulic, D.

AU - Casper, D.

AU - De Bonis, I.

AU - Decamp, D.

AU - Ghez, P.

AU - Goy, C.

AU - Lees, J. P.

AU - Minard, M. N.

AU - Odier, P.

AU - Pietrzyk, B.

AU - Ariztizabal, F.

AU - Comas, P.

AU - Crespo, J. M.

AU - Efthymiopoulos, I.

AU - Fernandez, E.

AU - Fernandez-Bosman, M.

AU - Gaitan, V.

AU - Garrido, Ll

AU - Martinez, M.

AU - Mattison, T.

AU - Ortreu, S.

AU - Pacheco, A.

AU - Padilla, C.

AU - Pascual, A.

AU - Creanza, D.

AU - de Palma, M.

AU - Farilla, A.

AU - Iaselli, G.

AU - Maggi, G.

AU - Marinelli, N.

AU - Natali, S.

AU - Nuzzo, S.

AU - Ranieri, A.

AU - Raso, G.

AU - Romano, F.

AU - Ruggieri, F.

AU - Selvaggi, G.

AU - Silvestris, L.

AU - Tempesta, P.

AU - Zito, G.

AU - Chai, Y.

AU - Huang, D.

AU - Huang, X.

AU - Lin, J.

AU - Wang, T.

AU - Xie, Y.

AU - Xu, D.

AU - Xu, R.

AU - Zhang, J.

AU - Zhang, L.

AU - Zhao, W.

AU - Bonvicini, G.

AU - Boudreau, J.

AU - Drevermann, H.

AU - Forty, R. W.

AU - Ganis, G.

AU - Gay, C.

AU - Girone, M.

AU - Hagelberg, R.

AU - Harvey, J.

AU - Hilgart, J.

AU - Jacobsen, R.

AU - Jost, B.

AU - Knobloch, J.

AU - Lehraus, I.

AU - Maggi, M.

AU - Markou, C.

AU - Mato, P.

AU - Meinhard, H.

AU - Minten, A.

AU - Miquel, R.

AU - Palazzi, P.

AU - Pater, J. R.

AU - Perlas, J. A.

AU - Perrodo, P.

AU - Pusztaszeri, J. F.

AU - Ranjard, F.

AU - Rolandi, L.

AU - Rothberg, J.

AU - Ruan, T.

AU - Saich, M.

AU - Schlatter, D.

AU - Schmelling, M.

AU - Sefkow, F.

AU - Tejessy, W.

AU - Tomalin, I. R.

AU - Veenhof, R.

AU - Wachsmuth, H.

AU - Wasserbaech, S.

AU - Wiedenmann, W.

AU - Wildish, T.

AU - Witzeling, W.

AU - Wotschack, J.

AU - Ajaltouni, Z.

AU - Bardadin-Otwinowska, M.

AU - Barres, A.

AU - Boyer, C.

AU - Falvard, A.

AU - Gay, P.

AU - Guicheney, C.

PY - 1994/1/1

Y1 - 1994/1/1

N2 - In 431 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of electrons and muons in events with one or more prompt leptons have been analysed to give information on the production and decay of heavy quarks. The fractions of {Mathematical expression} and {Mathematical expression} events are measured to be 0.219±0.006±0.005 and 0.165±0.005±0.020, and the corresponding forward-backward asymmetries at the Z mass are measured to be 0.090±0.013±0.003 and 0.111±0.021±0.018, after QED and QCD corrections. Measurements for the semileptonic branching ratios BR {Mathematical expression} and BR (b→cℓ+vX) yield 0.114±0.003±0.004 and 0.082±0.003±0.012, respectively. The dilepton events enable measurement of the b mixing parameter, Χ=0.114±0.014±0.008. Results are also presented for the energy variation of the {Mathematical expression} asymmetry and the parameters required to describe heavy quark fragmentation. From the asymmetry measurements, the effective electroweak mixing angle is sin2θWeff=0.2333±0.0022. © 1994 Springer-Verlag.

AB - In 431 000 hadronic Z decays recorded with the ALEPH detector at LEP, the yields of electrons and muons in events with one or more prompt leptons have been analysed to give information on the production and decay of heavy quarks. The fractions of {Mathematical expression} and {Mathematical expression} events are measured to be 0.219±0.006±0.005 and 0.165±0.005±0.020, and the corresponding forward-backward asymmetries at the Z mass are measured to be 0.090±0.013±0.003 and 0.111±0.021±0.018, after QED and QCD corrections. Measurements for the semileptonic branching ratios BR {Mathematical expression} and BR (b→cℓ+vX) yield 0.114±0.003±0.004 and 0.082±0.003±0.012, respectively. The dilepton events enable measurement of the b mixing parameter, Χ=0.114±0.014±0.008. Results are also presented for the energy variation of the {Mathematical expression} asymmetry and the parameters required to describe heavy quark fragmentation. From the asymmetry measurements, the effective electroweak mixing angle is sin2θWeff=0.2333±0.0022. © 1994 Springer-Verlag.

U2 - 10.1007/BF01560237

DO - 10.1007/BF01560237

M3 - Article

SN - 0170-9739

VL - 62

SP - 179

EP - 198

JO - Zeitschrift fur Physik C-Particles and Fields

JF - Zeitschrift fur Physik C-Particles and Fields

IS - 2

ER -

Heavy flavour production and decay with prompt leptons in the ALEPH detector

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