# Search for pair-production of long-lived heavy charged particles in $e^+ e^-$ annihilation

Abstract : 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 \sqrt{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.
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Journal articles

http://hal.in2p3.fr/in2p3-00005698
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Submitted on : Tuesday, July 25, 2000 - 12:09:44 PM
Last modification on : Thursday, December 16, 2021 - 2:10:17 PM

### Citation

R. Barate, D. Buskulic, D. Decamp, P. Ghez, C. Goy, et al.. Search for pair-production of long-lived heavy charged particles in $e^+ e^-$ annihilation. Physics Letters B, Elsevier, 1997, 405, pp.379-388. ⟨in2p3-00005698⟩

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