A search for pair-production of long-lived, heavy, singly-charged particles has been performed with data collected by the ALEPH detector at a centre-of-mass energy of 172 GeV. Data at root s = 161, 136, and 130 GeV are also included to improve the sensitivity to lower masses. No candidate is found in the data. A model-independent 95% confidence level upper limit on the production cross section at 172 GeV of 0.2-0.4 pb is derived for masses between 45 and 86 GeV/c(2). This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c(2) on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c(2) on the mass of long-lived charginos. (C) 1997 Elsevier Science B.V.
Titolo: | Search for pair-production of long-lived heavy charged particles in e(+)e(-) annihilation | |
Autori: | ||
Data di pubblicazione: | 1997 | |
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Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/S0370-2693(97)00715-6 | |
Handle: | http://hdl.handle.net/11384/5596 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |