Artículos de revistas
Search for long-lived particles decaying into electron or photon pairs with the D0 detector
Fecha
2008-09-12Registro en:
Physical Review Letters. College Pk: Amer Physical Soc, v. 101, n. 11, 7 p., 2008.
0031-9007
10.1103/PhysRevLett.101.111802
WOS:000259188700008
Autor
Joint Inst Nucl Res
Univ Buenos Aires
Ctr Brasileiro Pesquisas Fis
Universidade do Estado do Rio de Janeiro (UERJ)
Universidade Federal do ABC (UFABC)
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Institución
Resumen
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.