A Measurement of the QCD color factors and a limit on the light gluino

Physics

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A Measurement of the QCD color factors and a limit on the light gluino. / ALEPH Collaboration.
In: Zeitschrift für Physik C Particles and Fields, Vol. 76, No. 1, 1997, p. 1-14.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

ALEPH Collaboration 1997, 'A Measurement of the QCD color factors and a limit on the light gluino', Zeitschrift für Physik C Particles and Fields, vol. 76, no. 1, pp. 1-14.

APA

ALEPH Collaboration (1997). A Measurement of the QCD color factors and a limit on the light gluino. Zeitschrift für Physik C Particles and Fields, 76(1), 1-14.

Vancouver

ALEPH Collaboration. A Measurement of the QCD color factors and a limit on the light gluino. Zeitschrift für Physik C Particles and Fields. 1997;76(1):1-14.

Author

ALEPH Collaboration. / A Measurement of the QCD color factors and a limit on the light gluino. In: Zeitschrift für Physik C Particles and Fields. 1997 ; Vol. 76, No. 1. pp. 1-14.

Bibtex

@article{b5068307a0f14d8ea9043ce887108c4c,

title = "A Measurement of the QCD color factors and a limit on the light gluino",

abstract = "Using data collected from 1992 to 1995 with the ALEPH detector at LEP, a measurement of the colour factor ratios C-A/C-F and T-F/C-F and the strong coupling constant <(alpha)over bar (s)> = C-F alpha(s), (M-Z)/(2 pi) has been performed by fitting theoretical predictions simultaneously to the measured differential two-jet rate and angular distributions in four-jet events. The result is found to be in excellent agreement with QCD.C-A/C-F = 2.20 +/- 0.09 (stat) +/- 0.13 (syst),T-F/C-F = 0.29 +/- 0.05 (stat) +/- 0.06 (syst).Fixing C-A/C-F and T-F/C-F to the QCD values permits a determination of alpha(s) (M-Z) and n(f), the number of active flavours. With this measurement the existence of a gluino with mass below 6.3 GeV/c(2) is excluded at 95% confidence level.",

author = "R. Barate and Alexander Finch and {ALEPH Collaboration}",

year = "1997",

language = "English",

volume = "76",

pages = "1--14",

journal = "Zeitschrift f{\"u}r Physik C Particles and Fields",

issn = "0170-9739",

publisher = "Springer Verlag",

number = "1",

}

RIS

TY - JOUR

T1 - A Measurement of the QCD color factors and a limit on the light gluino

AU - Barate, R.

AU - Finch, Alexander

AU - ALEPH Collaboration

PY - 1997

Y1 - 1997

N2 - Using data collected from 1992 to 1995 with the ALEPH detector at LEP, a measurement of the colour factor ratios C-A/C-F and T-F/C-F and the strong coupling constant <(alpha)over bar (s)> = C-F alpha(s), (M-Z)/(2 pi) has been performed by fitting theoretical predictions simultaneously to the measured differential two-jet rate and angular distributions in four-jet events. The result is found to be in excellent agreement with QCD.C-A/C-F = 2.20 +/- 0.09 (stat) +/- 0.13 (syst),T-F/C-F = 0.29 +/- 0.05 (stat) +/- 0.06 (syst).Fixing C-A/C-F and T-F/C-F to the QCD values permits a determination of alpha(s) (M-Z) and n(f), the number of active flavours. With this measurement the existence of a gluino with mass below 6.3 GeV/c(2) is excluded at 95% confidence level.

AB - Using data collected from 1992 to 1995 with the ALEPH detector at LEP, a measurement of the colour factor ratios C-A/C-F and T-F/C-F and the strong coupling constant <(alpha)over bar (s)> = C-F alpha(s), (M-Z)/(2 pi) has been performed by fitting theoretical predictions simultaneously to the measured differential two-jet rate and angular distributions in four-jet events. The result is found to be in excellent agreement with QCD.C-A/C-F = 2.20 +/- 0.09 (stat) +/- 0.13 (syst),T-F/C-F = 0.29 +/- 0.05 (stat) +/- 0.06 (syst).Fixing C-A/C-F and T-F/C-F to the QCD values permits a determination of alpha(s) (M-Z) and n(f), the number of active flavours. With this measurement the existence of a gluino with mass below 6.3 GeV/c(2) is excluded at 95% confidence level.

M3 - Journal article

VL - 76

SP - 1

EP - 14

JO - Zeitschrift für Physik C Particles and Fields

JF - Zeitschrift für Physik C Particles and Fields

SN - 0170-9739

IS - 1

ER -

Research