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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/079/04/0829-0832

    • Keywords

       

      Charged massive long-lived particle; D0.

    • Abstract

       

      Results are presented 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. This search selects events in which one or more particles are reconstructed as muons but their speed and ionization energy loss (d𝐸/d𝑥) are different from muons produced in beam–beam collisions. CMLLPs have been predicted by several theories of physics beyond the Standard Model. In this search we exclude pair-produced long-lived gaugino-like charginos with masses below 251 GeV and higgsino-like charginos with masses below 230 GeV at 95% CL, as well as long-lived stop quarks with masses below 265 GeV. We place cross-section limits on long-lived staus as 0.04 to 0.006 pb for stau masses in the range 100 to 300 GeV.

    • Author Affiliations

       

      Sudeshna Banerjee1 for the D0 Collaboration

      1. Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India
    • Dates

       
  • Pramana – Journal of Physics | News

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