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Constraints on anomalous QGCs in $e^{+}e^{-}$ interactions from 183 to 209 GeV
The acoplanar photon pairs produced in the reaction e/sup +/e/sup to / nu nu gamma gamma are analysed in the 700 pb/sup -1/ of data collected by the ALEPH detector at centre-of-mass energies between 183 and 209 GeV. No deviation from the standard model predictions is seen in any of the distributions...
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Lenguaje: | eng |
Publicado: |
2004
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2004.09.041 http://cds.cern.ch/record/909078 |
Sumario: | The acoplanar photon pairs produced in the reaction e/sup +/e/sup to / nu nu gamma gamma are analysed in the 700 pb/sup -1/ of data collected by the ALEPH detector at centre-of-mass energies between 183 and 209 GeV. No deviation from the standard model predictions is seen in any of the distributions examined. The resulting 95% C.L. limits set on the anomalous QGCs, a/sub 0//sup Z/, a/sub c//sup Z/, a /sub 0//sup W/ a/sub c//sup W/, are -0.012<a/sub 0//sup Z// Lambda /sup 2/<+0.019 GeV/sup -2/, -0.041<a/sub c//sup Z// Lambda /sup 2 /<+0.044 GeV/sup -2/, -0.060<a/sub 0//sup W// Lambda /sup 2/< +0.055 GeV/sup -2/, -0.099<a/sub c//sup W// Lambda /sup 2/<+0.093 GeV/sup -2 /, where Lambda is the energy scale of the new physics responsible for the anomalous couplings. |
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