Single- and Multi-Photon Events with Missing Energy in e+e- Collisions at LEP
read the original abstract
Single- and multi-photon events with missing energy are selected in 619/pb of data collected by the L3 detector at LEP at centre-of-mass energies between 189GeV and 209GeV. The cross sections of the process e^+e^- -> nu nu gamma (gamma) are found to be in agreement with the Standard Model expectations, and the number of light neutrino species is determined, including lower energy data, to be N_nu = 2.98 +/- 0.05 +/- 0.04. Selection results are also given in the form of tables which can be used to test future models involving single- and multi-photon signatures at LEP. These final states are also predicted by models with large extra dimensions and by several supersymmetric models. No evidence for such models is found. Among others, lower limits between 1.5TeV and 0.65TeV are set, at 95% confidence level, on the new scale of gravity for the number of extra dimensions between 2 and 6.
This paper has not been read by Pith yet.
Forward citations
Cited by 2 Pith papers
-
GeV-scale thermal dark matter from dark photons: tightly constrained, yet allowed
In a dark-photon-mediated Dirac fermionic DM model, only narrow resonant regions with small dark-sector coupling allow the candidate to saturate the full relic density while evading current direct and indirect detecti...
-
Prospects of boosted magnetic dipole inelastic fermion dark matter at ILC-BDX
ILC-BDX can probe inelastic magnetic-dipole dark matter in a relevant parameter space for relative mass splittings of 0.05 and 0.001 over 1-10 years of running with 4e21 electrons on target per year.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.