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, Sachio 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

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)349-359
Number of pages11
JournalZeitschrift für Physik C Particles and Fields
Volume46
Issue number3
DOIs
Publication statusPublished - 1990 Sep 1
Externally publishedYes

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quarks
Systematic errors
Detectors
Electrons
asymmetry
systematic errors
muons
continuums
detectors
electrons
Uncertainty
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Elsen, E., Allison, J., Ambrus, K., Barlow, R. J., Bartel, W., Bethke, S., ... 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

A measurement of the weak axial couplings of the b- and c-quark. / 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.; Heintze, J.; Heinzelmann, G.; Hellenbrand, K. H.; Hill, P.; Hughes, G.; Kado, H.; Kawamoto, T.; Kleinwort, C.; Knies, G.; Kobayashi, T.; Komamiya, Sachio; Krehbiel, H.; v. Krogh, J.; Kuhlen, M.; Loebinger, F. K.; Macbeth, A. A.; Magnussen, N.; Marshall, R.; Meinke, R.; Middleton, R. P.; Minowa, H.; Murphy, P. G.; Naroska, B.; Nye, J. M.; Olsson, J.; Ould-Saada, F.; Ramcke, R.; Rieseberg, H.; Schmidt, D.; von der Schmitt, H.; Smolik, L.; Schneekloth, U.; Skard, J. A.J.; Spitzer, J.; Steffen, P.; Stephens, K.; Wagner, A.; Walker, I. W.; Weber, G.; Zimmer, M.; Zorn, G. T.

In: Zeitschrift für Physik C Particles and Fields, Vol. 46, No. 3, 01.09.1990, p. 349-359.

Research output: Contribution to journalArticle

Elsen, E, Allison, J, Ambrus, K, Barlow, RJ, Bartel, W, Bethke, S, Bowdery, CK, Cartwright, SL, Chrin, J, Clarke, D, Dieckmann, A, Duerdoth, IP, Eckerlin, G, Felst, R, Finch, AJ, Foster, F, Greenshaw, T, Hagemann, J, Haidt, D, Heintze, J, Heinzelmann, G, Hellenbrand, KH, Hill, P, Hughes, G, Kado, H, Kawamoto, T, Kleinwort, C, Knies, G, Kobayashi, T, Komamiya, S, Krehbiel, H, v. Krogh, J, Kuhlen, M, Loebinger, FK, Macbeth, AA, Magnussen, N, Marshall, R, Meinke, R, Middleton, RP, Minowa, H, Murphy, PG, Naroska, B, Nye, JM, Olsson, J, Ould-Saada, F, Ramcke, R, Rieseberg, H, Schmidt, D, von der Schmitt, H, Smolik, L, Schneekloth, U, Skard, JAJ, Spitzer, J, Steffen, P, Stephens, K, Wagner, A, Walker, IW, Weber, G, Zimmer, M & Zorn, GT 1990, 'A measurement of the weak axial couplings of the b- and c-quark', Zeitschrift für Physik C Particles and Fields, vol. 46, no. 3, pp. 349-359. https://doi.org/10.1007/BF01621022
Elsen E, Allison J, Ambrus K, Barlow RJ, Bartel W, Bethke S et al. A measurement of the weak axial couplings of the b- and c-quark. Zeitschrift für Physik C Particles and Fields. 1990 Sep 1;46(3):349-359. https://doi.org/10.1007/BF01621022
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. ; Heintze, J. ; Heinzelmann, G. ; Hellenbrand, K. H. ; Hill, P. ; Hughes, G. ; Kado, H. ; Kawamoto, T. ; Kleinwort, C. ; Knies, G. ; Kobayashi, T. ; Komamiya, Sachio ; Krehbiel, H. ; v. Krogh, J. ; Kuhlen, M. ; Loebinger, F. K. ; Macbeth, A. A. ; Magnussen, N. ; Marshall, R. ; Meinke, R. ; Middleton, R. P. ; Minowa, H. ; Murphy, P. G. ; Naroska, B. ; Nye, J. M. ; Olsson, J. ; Ould-Saada, F. ; Ramcke, R. ; Rieseberg, H. ; Schmidt, D. ; von der Schmitt, H. ; Smolik, L. ; Schneekloth, U. ; Skard, J. A.J. ; Spitzer, J. ; Steffen, P. ; Stephens, K. ; Wagner, A. ; Walker, I. W. ; Weber, G. ; Zimmer, M. ; Zorn, G. T. / A measurement of the weak axial couplings of the b- and c-quark. In: Zeitschrift für Physik C Particles and Fields. 1990 ; Vol. 46, No. 3. pp. 349-359.
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title = "A measurement of the weak axial couplings of the b- and c-quark",
abstract = "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.",
author = "E. Elsen and J. Allison and K. Ambrus and Barlow, {R. J.} and W. Bartel and S. Bethke and Bowdery, {C. K.} and Cartwright, {S. L.} and J. Chrin and D. Clarke and A. Dieckmann and Duerdoth, {I. P.} and G. Eckerlin and R. Felst and Finch, {A. J.} and F. Foster and T. Greenshaw and J. Hagemann and D. Haidt and J. Heintze and G. Heinzelmann and Hellenbrand, {K. H.} and P. Hill and G. Hughes and H. Kado and T. Kawamoto and C. Kleinwort and G. Knies and T. Kobayashi and Sachio Komamiya and H. Krehbiel and {v. Krogh}, J. and M. Kuhlen and Loebinger, {F. K.} and Macbeth, {A. A.} and N. Magnussen and R. Marshall and R. Meinke and Middleton, {R. P.} and H. Minowa and Murphy, {P. G.} and B. Naroska and Nye, {J. M.} and J. Olsson and F. Ould-Saada and R. Ramcke and H. Rieseberg and D. Schmidt and {von der Schmitt}, H. and L. Smolik and U. Schneekloth and Skard, {J. A.J.} and J. Spitzer and P. Steffen and K. Stephens and A. Wagner and Walker, {I. W.} and G. Weber and M. Zimmer and Zorn, {G. T.}",
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TY - JOUR

T1 - A measurement of the weak axial couplings of the b- and c-quark

AU - Elsen, E.

AU - Allison, J.

AU - Ambrus, K.

AU - Barlow, R. J.

AU - Bartel, W.

AU - Bethke, S.

AU - Bowdery, C. K.

AU - Cartwright, S. L.

AU - Chrin, J.

AU - Clarke, D.

AU - Dieckmann, A.

AU - Duerdoth, I. P.

AU - Eckerlin, G.

AU - Felst, R.

AU - Finch, A. J.

AU - Foster, F.

AU - Greenshaw, T.

AU - Hagemann, J.

AU - Haidt, D.

AU - Heintze, J.

AU - Heinzelmann, G.

AU - Hellenbrand, K. H.

AU - Hill, P.

AU - Hughes, G.

AU - Kado, H.

AU - Kawamoto, T.

AU - Kleinwort, C.

AU - Knies, G.

AU - Kobayashi, T.

AU - Komamiya, Sachio

AU - Krehbiel, H.

AU - v. Krogh, J.

AU - Kuhlen, M.

AU - Loebinger, F. K.

AU - Macbeth, A. A.

AU - Magnussen, N.

AU - Marshall, R.

AU - Meinke, R.

AU - Middleton, R. P.

AU - Minowa, H.

AU - Murphy, P. G.

AU - Naroska, B.

AU - Nye, J. M.

AU - Olsson, J.

AU - Ould-Saada, F.

AU - Ramcke, R.

AU - Rieseberg, H.

AU - Schmidt, D.

AU - von der Schmitt, H.

AU - Smolik, L.

AU - Schneekloth, U.

AU - Skard, J. A.J.

AU - Spitzer, J.

AU - Steffen, P.

AU - Stephens, K.

AU - Wagner, A.

AU - Walker, I. W.

AU - Weber, G.

AU - Zimmer, M.

AU - Zorn, G. T.

PY - 1990/9/1

Y1 - 1990/9/1

N2 - 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.

AB - 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.

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