Atkins, Scott
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Search for Anomalous Single Photon Production at {PEP}

Bartha, G. ; Burke, D.L. ; Extermann, P. ; et al.
Phys.Rev.Lett. 56 (1986) 685, 1986.
Inspire Record 218333 DOI 10.17182/hepdata.20247

This Letter reports a search for the production by e+e− annihilation of a single photon accompanied by particles that interact only weakly in matter. The search was performed at the SLAC e+e− storage ring PEP (√s =29 GeV) with a new detector, ASP. No unexpected signal was observed. The limit Nν<14 (90% C.L.) is placed on the number of light neutrino species, and the mass of scalar electrons predicted by theories of supersymmetry is constrained to mẽ>51 GeV/c2 (90% C.L.) for mγ̃=0 and degenerate ẽ mass states.

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