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Weighing the universe with accelerators and detectors

Weighing the universe with accelerators and detectors,10.1142/S0218271801000998,Michal Brhlik,Daniel J. H. Chung,Gordon L. Kane

Weighing the universe with accelerators and detectors   (Citations: 6)
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Suppose the lightest superpartner (LSP) is observed at colliders, and WIMPs are detected in explicit experiments. We point out that one cannot immediately conclude that cold dark matter (CDM) of the universe has been observed, and we determine what measurements are necessary before such a conclusion is meaningful. We discuss the analogous situation for neutrinos and axions; in the axion case we have not found a way to conclude axions are the CDM even if axions are detected.
Published in 2000.
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    • ...In the next few years, the Large Hadron Collider (LHC) shows the promise of producing these elusive particles and possibly measuring their microscopic properties [1,2]...
    • ...For example, we already know that neutrinos make up roughly a percent of the dark matter, and most complete theories have in addition to massive neutrinos also Weakly Interacting Massive Particles (WIMPs) and axions, so naively there is no convincing reason to expect one form to entirely dominate, as first emphasized in [1]...
    • ...Even if these are taken to vanish, it was first stressed in [1] that this can still introduce a large uncertainty of around six into the critical density of dark matter in LSPs...
    • ...Indeed, it will be difficult if not impossible to calculate an axion relic density [1]...

    Gordon Kaneet al. Dark Matter and Lhc:. what is the Connection?

    • ...Ref. [36] investigated how the variation of the input parameters affected the prediction of the relic density (and direct detection) but this was a pre-WMAP study in a scenario no longer viable and, more importantly, does not address the sensitive issues of poles and co-annihilations that we will study...

    Benjamin C. Allanachet al. Requirements on collider data to match the precision of WMAP on supers...

    • ...2 1 Sj11 (q) + a0a1Sj01 (q) � � , (1) a Only an upper bound on the relic density, consistent with WMAP, was imposed while...

    Jacob L. Bourjaily. Weighing the Dark Matter Halo

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