Reconstructing dark matter density with e+e- linear collider in focus-point supersymmetry

Takeo Moroi, Yasuhiro Shimizu, Akira Yotsuyanagi

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

It has been known that, in the focus point scenario of supersymmetry, the thermal relic of the lightest superparticle (LSP) is known to be a good candidate of the cold dark matter. Assuming that the LSP in the focus-point scenario be the cold dark matter, we address a question how and how well the relic density of the LSP can be determined once the superparticles are found at future e+e- linear collider. We will see that the determinations of the mass of the LSP as well as those of the Higgsino-like chargino and neutralinos, which will be possible by a study of the decay kinematics of the chargino or by threshold scan, will give us important information to theoretically reconstruct the relic density. Even if the Higgsino-like superparticles and the LSP are the only superparticles which are kinematically accessible, relic density of the LSP may be calculated with the accuracy of factor ∼2; by adopting a mild theoretical assumption or by determining the masses of the wino-like superparticles, uncertainty can be reduced to ∼10% or smaller.

Original languageEnglish
Pages (from-to)79-87
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume625
Issue number1-2
DOIs
Publication statusPublished - 2005 Oct 6

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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