Study of the e<sup>+</sup>e<sup>-</sup> → Zγγ → qq̄γγ process at LEP

Study of the e⁺e^- → Zγγ → qq̄γγ process at LEP

Authors	L3 Collaboration M. Acciarri S.V. Baldew G.J. Bobbink M. Dierckxsens D. van Dierendonck P. Duinker F.C. Erné R. van Gulik P. de Jong F.L. Linde A.J.M. Muijs
Publication date	2001
Journal	Physics Letters B
Volume \| Issue number	505 \| 1-4
Pages (from-to)	47-58
Organisations	Faculty of Science (FNWI) - Institute of Physics (IoP) - Institute for High Energy Physics (IHEF)
Abstract	The process e⁺e^- → Zγγ → qq̄γγ is studied in 0.5 fb^-1 of data collected with the L3 detector at centre-of-mass energies between 130.1 GeV and 201.7 GeV. Cross sections are measured and found to be consistent with the Standard Model expectations. The study of the least energetic photon constrains the quartic gauge boson couplings to -0.008 GeV^-2 < a₀/Λ² < 0.005 GeV^-2 and -0.007 GeV^-2 < a_c/Λ² < 0.011 GeV^-2, at 95% confidence level.
Document type	Article
Language	English
Published at	https://doi.org/10.1016/S0370-2693(01)00308-2
Downloads	0102024.pdf (Submitted manuscript)
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