Searches for New Physics in Photonic Final States at LEP.pdf

EPJ manuscript No. (will be inserted by the editor) Searches for New Physics in Photonic Final States at LEP Marat Gataullin (on behalf of the LEP Collaborations) California Institute of Technology, Department of Physics, Pasadena, CA 91125 3 0 0 Received: date / Revised version: date 2 Abstract. A brief review of searches for physics beyond the Standard Model in photonic final states at LEP v is given here. These include searches for supersymmetry, large extra dimensions and contact interactions. o Recent results from all four LEP experiments are presented, including improved limits on the new scale of N gravity for models with large extra dimensions and the most precise direct measurement of the number of 6 light neutrino species. Status and prospects of the LEP combined searches are also discussed. + − 1 PACS. 13.66.Hk Production of non-standard model particles in e e interactions – 04.50.+h Gravity in v more than four dimensions – 12.60.Jv Supersymmetric models – 12.60.-i Models beyond the standard 4 model – 13.15.+g Neutrino interactions 1 0 1 1 Introduction 1 400 Data  L3 3 N = 4 √s = 189-208 GeV 0 Photonic final states were produced at LEP via the re- ν + − + − N = 3 / actions e e → ννγ¯ (γ ) and e e → γγ (γ ), leading to V 300 ν