M. Acciarri et al., SINGLE AND MULTIPHOTON EVENTS WITH MISSING ENERGY IN E(-) COLLISIONS AT 161 GEV-LESS-THAN-ROOT-S-LESS-THAN-172 GEV()E(), Physics letters. Section B, 415(3), 1997, pp. 299-310
A search for single and multi-photon events with missing energy is per
formed using data collected at centre-of-mass energies between 161 GeV
and 172 GeV for a total of 20.9 pb(-1) of integrated luminosity. The
results obtained are used to derive the value for the nu<(nu)over bar>
gamma(gamma) cross section as well as upper limits on new physics proc
esses. (C) 1997 Published by Elsevier Science B.V.