A measurement of the weak axial couplings of the b- and c-quark

E. Elsen, J. Allison, K. Ambrus, R. J. Barlow, W. Bartel, S. Bethke, C. K. Bowdery, S. L. Cartwright, J. Chrin, D. Clarke, A. Dieckmann, I. P. Duerdoth, G. Eckerlin, R. Felst, A. J. Finch, F. Foster, T. Greenshaw, J. Hagemann, D. Haidt, J. HeintzeG. Heinzelmann, K. H. Hellenbrand, P. Hill, G. Hughes, H. Kado, T. Kawamoto, C. Kleinwort, G. Knies, T. Kobayashi, S. Komamiya, H. Krehbiel, J. v. Krogh, M. Kuhlen, F. K. Loebinger, A. A. Macbeth, N. Magnussen, R. Marshall, R. Meinke, R. P. Middleton, H. Minowa, P. G. Murphy, B. Naroska, J. M. Nye, J. Olsson, F. Ould-Saada, R. Ramcke, H. Rieseberg, D. Schmidt, H. von der Schmitt, L. Smolik, U. Schneekloth, J. A.J. Skard, J. Spitzer, P. Steffen, K. Stephens, A. Wagner, I. W. Walker, G. Weber, M. Zimmer, G. T. Zorn

研究成果: Article

29 引用 (Scopus)

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The forward-backward charge asymmetries of the b and c quarks are measured with the JADE detector at PETRA at {Mathematical expression} GeV and 44 GeV using both electrons and muons to tag the heavy quarks. At {Mathematical expression} GeV, a simultaneous fit for the two asymmetries yields the result Ab=-9.3±5.2% (state.) nd Ac=-9.6±4.0% (stat.). The systematic errors are comparable with the statistical uncertainties. Combining the measurements at both energies and alternately constraining the weak coupling of the c and b quark to their Standard Model values (ac=1, ab=-1) increases the precision of the measurement of coupling constant of the other quark. Using this procedure ab=-0.72±0.34 and ac=0.79±0.40, where the numbers are corrected for {Mathematical expression} and the errors include both statistical and systematic contributions. The mixing parameter for continuum {Mathematical expression} is determined to be χ-0.24±0.12 if both heavy quark coupling constants are constrained to their values in the Standard Model.

元の言語English
ページ(範囲)349-359
ページ数11
ジャーナルZeitschrift für Physik C Particles and Fields
46
発行部数3
DOI
出版物ステータスPublished - 1990 9

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

フィンガープリント A measurement of the weak axial couplings of the b- and c-quark' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

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    Elsen, E., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., Bowdery, C. K., Cartwright, S. L., Chrin, J., Clarke, D., Dieckmann, A., Duerdoth, I. P., Eckerlin, G., Felst, R., Finch, A. J., Foster, F., Greenshaw, T., Hagemann, J., Haidt, D., ... Zorn, G. T. (1990). A measurement of the weak axial couplings of the b- and c-quark. Zeitschrift für Physik C Particles and Fields, 46(3), 349-359. https://doi.org/10.1007/BF01621022