Search for long-lived particles decaying into electron or photon pairs with the D0 detector
Number of Authors: 519
2008 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 101, no 11, 111802- p.Article in journal (Refereed) Published
In this Letter we report on a search for long-lived particles that decay into final states with two electrons or photons. Such long-lived particles arise in a variety of theoretical models, such as hidden valleys and supersymmetry with gauge-mediated breaking. By precisely reconstructing the direction of the electromagnetic shower we are able to probe much longer lifetimes than previously explored. We see no evidence of the existence of such long-lived particles and interpret this search as a quasi model-independent limit on their production cross section, as well as a limit on a long-lived fourth generation quark.
Place, publisher, year, edition, pages
2008. Vol. 101, no 11, 111802- p.
IdentifiersURN: urn:nbn:se:kth:diva-47355DOI: 10.1103/PhysRevLett.101.111802ISI: 000259188700008OAI: oai:DiVA.org:kth-47355DiVA: diva2:454830
QC 20111108 Author Count: 5192011-11-082011-11-082012-02-01Bibliographically approved