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. Heintze; G. 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

doi:10.1007/BF01621022

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

^*Corresponding author for this work

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

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 A_b=-9.3±5.2% (state.) nd A_c=-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 (a_c=1, a_b=-1) increases the precision of the measurement of coupling constant of the other quark. Using this procedure a_b=-0.72±0.34 and a_c=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 language	English
Pages (from-to)	349-359
Number of pages	11
Journal	Zeitschrift für Physik C Particles and Fields
Volume	46
Issue number	3
DOIs	https://doi.org/10.1007/BF01621022
Publication status	Published - 1990 Sept
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1007/BF01621022

Cite this

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

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

@article{0015ecb8faf542e9b3e7f68097bf15a0,

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 S. 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.}",

year = "1990",

month = sep,

doi = "10.1007/BF01621022",

language = "English",

volume = "46",

pages = "349--359",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "3",

}

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, S.

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

Y1 - 1990/9

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.

UR - http://www.scopus.com/inward/record.url?scp=0000901147&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000901147&partnerID=8YFLogxK

U2 - 10.1007/BF01621022

DO - 10.1007/BF01621022

M3 - Article

AN - SCOPUS:0000901147

SN - 1434-6044

VL - 46

SP - 349

EP - 359

JO - European Physical Journal C

JF - European Physical Journal C

IS - 3

ER -

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

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this