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Search for pair production of longlived heavy charged particles in e+ e- annihilation

Research output: Contribution to journalJournal article

  • ALEPH Collaboration
<mark>Journal publication date</mark>1997
<mark>Journal</mark>Physics Letters B
Issue number3-4
Number of pages10
Pages (from-to)379-388
<mark>Original language</mark>English


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 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/c2. This cross section limit implies, assuming the MSSM, a lower limit of 67 (69) GeV/c2 on the mass of right- (left-) handed long-lived scalar taus or scalar muons and of 86 GeV/c2 on the mass of long-lived charginos.