2000/07/19 by Manuel Drees, Yeong Gyun Kim, Mihoko M. Nojiri +4 · 91 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Dark Matter and Cosmic Phenomena #Higgsino #Large Hadron Collider #Minimal Supersymmetric Standard Model #Particle physics #Particle physics theoretical and experimental studies #Physics #astro-ph #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.63.035008
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 63(3) (American Physical Society)
arxiv created 2000/07/19 · openalex publication_date 2001/01/11 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that CERN LHC experiments might well be able to determine all the parameters required for a prediction of the present density of thermal LSP relics from the big bang era. If the LSP is an almost pure B\ensuremath-ino we usually only need to determine its mass and the mass of the SU(2) singlet sleptons. This information can be obtained by reconstructing the cascade qL\ensuremath→\stackrel\ifmmode \else \~\fi\ensuremathχ20\stackrel\ensuremath→qlRl\stackrel\ensuremath→q\stackrel\ifmmode \else \~\fi\ensuremathχ10l+l^\ensuremath-q. The only requirement is that m_lR<m_\stackrel\ifmmode \else \~\fi\ensuremathχ20, which is true for most of the cosmologically interesting parameter space. If the LSP has a significant Higgsino component, its predicted thermal relic density is smaller than for an equal-mass B\ensuremath-ino. We show that in this case squark decays also produce significant numbers of \stackrel\ifmmode \else \~\fi\ensuremathχ40 and \stackrel\ifmmode \else \~\fi\ensuremathχ2^\ifmmode±\else\textpm\fi. Reconstructing the corresponding decay cascades then allows us to determine the Higgsino component of the LSP.