The acoplanar photon pairs produced in the reaction e(+) e(-) --> vvyy are analysed in the 700 pb(-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 anomalous QGCs, a(0)(Z), a(c)(Z), a(0)(W) and a(c)(W), are -0.012 < a(0)(Z)/Lambda(2) < +0.019 GeV(-2), -0.041 < a(c)(Z)/Lambda(2) < +0.044 GeV(-2), -0.060 < a(0)(W)/Lambda(2) < +0.055 GeV(-2), -0.099 < a(c)(W)/Lambda(2) < +0.093 GeV(-2), where Lambda is the energy scale of the new physics responsible for the anomalous couplings.

Constraints on anomalous QGCs in e(+)e(-) interactions from 183 to 209 GeV

de Palma M;SELVAGGI, Giovanna;NUZZO, Salvatore Vitale
2004

Abstract

The acoplanar photon pairs produced in the reaction e(+) e(-) --> vvyy are analysed in the 700 pb(-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 anomalous QGCs, a(0)(Z), a(c)(Z), a(0)(W) and a(c)(W), are -0.012 < a(0)(Z)/Lambda(2) < +0.019 GeV(-2), -0.041 < a(c)(Z)/Lambda(2) < +0.044 GeV(-2), -0.060 < a(0)(W)/Lambda(2) < +0.055 GeV(-2), -0.099 < a(c)(W)/Lambda(2) < +0.093 GeV(-2), where Lambda is the energy scale of the new physics responsible for the anomalous couplings.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11586/23874
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