Title
Search for pair-produced neutralinos in events with photons and missing energy from e<sup>+</sup>e<sup>-</sup> collisions at √s=130-183 GeV
Date Issued
01 January 1999
Access level
open access
Resource Type
journal article
Author(s)
Abreu P.
Adye T.
Adzic P.
Ajinenko I.
Alekseev G.D.
Alemany R.
Allport P.P.
Almehed S.
Amaldi U.
Amato S.
Anassontzis E.G.
Andersson P.
Andreazza A.
Andringa S.
Antilogus P.
Apel W.D.
Arnoud Y.
Åsman B.
Augustin J.E.
Augustinus A.
Baillon P.
Bambade P.
Barao F.
Barbiellini G.
Barbier R.
Bardin D.Y.
Barker G.
Baroncelli A.
Battaglia M.
Baubillier M.
Becks K.H.
Begalli M.
Beilliere P.
Belokopytov Y.
Benvenuti A.C.
Berat C.
Berggren M.
Bertini D.
Bertrand D.
Besancon M.
Bianchi F.
Bigi M.
Bilenky M.S.
Bizouard M.A.
Bloch D.
Blom H.M.
Bonesini M.
Bonivento W.
Boonekamp M.
Booth P.S.L.
Borgland A.W.
Borisov G.
Bosio C.
Botner O.
Boudinov E.
Bouquet B.
Bourdarios C.
Bowcock T.J.V.
Boyko I.
Bozovic I.
Bozzo M.
Branchini P.
Brenke T.
Brenner R.A.
Bruckman P.
Brunet J.M.
Bugge L.
Buran T.
Burgsmueller T.
Buschmann P.
Cabrera S.
Caccia M.
Calvi M.
Camacho Rozas A.J.
Camporesi T.
Canale V.
Carena F.
Carroll L.
Caso C.
Castillo Gimenez M.V.
Cattai A.
Cavallo F.R.
Cerruti C.
Chabaud V.
Charpentier P.
Chaussard L.
Checchia P.
Chelkov G.A.
Chierici R.
Chliapnikov P.
Chochula P.
Chorowicz V.
Chudoba J.
Collins P.
Colomer M.
Contri R.
Cortina E.
Cosme G.
Cossutti F.
Cowell J.H.
Publisher(s)
Springer New York LLC
Abstract
The events with two photons and missing (transverse) energy collected by the DELPHI detector at centre-of-mass energies between 130 GeV and 183 GeV have been studied to search for processes of the type e+e- → YY with the subsequent decay Y → Xγ, where X is an undetectable neutral particle. Reactions of this kind are expected in supersymmetric models, where the Y particle can be either the lightest neutralino, decaying to a photon and a gravitino, or the next-to-lightest neutralino, decaying to a photon and the lightest neutralino. To study the case of long-lived Y particles, a search for single-photon events with the reconstructed photon axis pointing far from the beam interaction region has also been performed. No evidence for a deviation from Standard Model expectations has been observed in the data and upper limits have been derived on the signal cross-section as a function of the the X and Y masses and of the Y mean decay path.
Start page
371
End page
384
Volume
6
Issue
3
Language
English
OCDE Knowledge area
Física y Astronomía
Scopus EID
2-s2.0-0002853624
Source
European Physical Journal C
ISSN of the container
14346044
Sources of information:
Directorio de Producción Científica
Scopus