A Search for charged massive long-lived particles

Tanasijczuk, Andres Jorge;D0;et.al.
(2012) Physical Review Letters — Vol. 108 (2012)

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We report on a search for charged massive long-lived particles (CMLLPs), based on 5.2 fb$^{-1}$ of integrated luminosity collected with the D0 detector at the Fermilab Tevatron $p\bar{p}$ collider. We search for events in which one or more particles are reconstructed as muons but have speed and ionization energy loss $(dE/dx)$ inconsistent with muons produced in beam collisions. CMLLPs are predicted in several theories of physics beyond the standard model. We exclude pair-produced long-lived gaugino-like charginos below 267 GeV and higgsino-like charginos below 217 GeV at 95% C.L., as well as long-lived scalar top quarks with mass below 285 GeV.
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Tanasijczuk, A. J., D0, & et al. (2012). A Search for charged massive long-lived particles. Physical Review Letters, 108. https://doi.org/10.1103/PhysRevLett.108.121802 (Original work published 2012)