# Single and Multi-Photon Events with Missing Energy in $e^+ e^-$ Collisions at $\sqrt{s}$ = 183 GeV

3 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
Abstract : An analysis of single and multi-photon events with missing energy is performed using data collected with the L3 detector at LEP at centre-of-mass energies around 183\gev, for a total of 55.3 pb$^{-1}$ of integrated luminosity. The results obtained are in good agreement with the Standard Model prediction and are used to derive the value for the $\epem\ra\nnbar\gamma(\gamma)$ cross section as well as upper limits on cross sections of new physics processes. Several interpretations in supersymmetric models providing new limits on the masses of the lightest neutralino and of the gravitino are presented.
Document type :
Journal articles

Cited literature [35 references]

http://hal.in2p3.fr/in2p3-00002408
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Submitted on : Monday, January 18, 1999 - 12:17:08 PM
Last modification on : Thursday, July 30, 2020 - 7:10:12 AM
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### Citation

M. Acciarri, O. Adriani, M. Aguilar-Benitez, S. Ahlen, J. Alcaraz, et al.. Single and Multi-Photon Events with Missing Energy in $e^+ e^-$ Collisions at $\sqrt{s}$ = 183 GeV. Physics Letters B, Elsevier, 1998, 444, pp.503-515. ⟨10.1016/S0370-2693(98)01403-8⟩. ⟨in2p3-00002408⟩