Photon events with missing energy in e+ e- collisions at s**(1/2) = 130-GeV to 209-GeV - INSPIRE

DataBETA

Photon events with missing energy in e+ e- collisions at s**(1/2) = 130-GeV to 209-GeV

DELPHI

Collaboration

Dec, 2003

33 pages

Published in:

Eur.Phys.J.C 38 (2005) 395-411

e-Print:

hep-ex/0406019 [hep-ex]

DOI:

10.1140/epjc/s2004-02051-8

PDG: Number of Light

{{\mathit \nu}}

Types from Direct Measurement of Invisible

{{\mathit Z}}

Report number:

CERN-EP-2003-093

Experiments:

CERN-LEP-DELPHI

View in:

reference search257 citations

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Abstract:

The production of single- and multi-photon events has been studied in the reaction e+e- -> gamma (gamma) + invisible particles. The data collected with the DELPHI detector during the years 1999 and 2000 at centre-of-mass energies between 191 GeV and 209 GeV was combined with earlier data to search for phenomena beyond the Standard Model. The measured number of light neutrino families was consistent with three and the absence of an excess of events beyond that predicted by the Standard Model processes was used to set limits on new physics. Both model-independent searches and searches for new processes predicted by supersymmetric and extra-dimensional models have been made. Limits on new non-standard model interactions between neutrinos and electrons were also determined.

Note:

34 pages, 12 figures, version accepted for publication by Eur. Phys. J. C Report-no: CERN-EP/2003-093 Journal-ref: Eur. Phys. J. C38 (2005) 395-411 DOI: 10.1140/epjc/s2004-02051-8

electron positron: colliding beams
electron positron: annihilation
photon: electroproduction
photon: multiple production
missing-energy
neutrino: pair production
flavor: 3
new particle: search for
supersymmetry: symmetry breaking
supergravity

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