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Search for charged massive long-lived particles

Abstract : 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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Contributor : Sylvie Flores <>
Submitted on : Monday, October 17, 2011 - 11:22:43 AM
Last modification on : Friday, September 10, 2021 - 1:50:07 PM

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V.M. Abazov, F. Badaud, U. Bassler, G. Bernardi, M. Besançon, et al.. Search for charged massive long-lived particles. Physical Review Letters, American Physical Society, 2012, 108, pp.121802. ⟨10.1103/¨PhysRevLett.108.121802⟩. ⟨in2p3-00632979⟩



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