Search for Charged Massive Long-Lived Particles

V. M. Abazov et al. (D0 Collaboration)
Phys. Rev. Lett. 108, 121802 – Published 21 March 2012

Abstract

We report on a search for charged massive long-lived particles (CMLLPs), based on 5.2fb1 of integrated luminosity collected with the D0 detector at the Fermilab Tevatron pp¯ 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 gauginolike 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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  • Received 17 October 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.121802

© 2012 American Physical Society

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Vol. 108, Iss. 12 — 23 March 2012

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