2,990 research outputs found

    Nuclear target effect on dark matter detection rate

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    Expected event rates for a number of dark matter nuclear targets were calculated in the effective low-energy minimal supersymmetric standard model, provided the lightest neutralino is the dark matter Weakly Interacting Massive Particle (WIMP). These calculations allow direct comparison of sensitivities of different dark matter detectors to intermediate mass WIMPs expected from the measurements of the DArk MAtter (DAMA) experiment.Comment: 14 pages, 11 figures, revtex

    On importance of dark matter for LHC physics

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    I would like to attract attention of the LHC high-energy physics community to non-accelerator, low-energy experiments, that are also very sensitive to new physics. My example concerns search for supersymmetric dark matter particles. It is shown that non-observation of the SUSY dark matter candidates with a high-accuracy detector can exclude large domains of the MSSM parameter space and, in particular, can make especially desirable collider search for light SUSY charged Higgs boson.Comment: latex, 12 pages, 9 figures, to be published in "Particles and Nuclei, Letters"; Talk given at the International symposium "LHC physics and detectors", Dubna, 28--30 June, 200

    On leading charmed meson production in π\pi-nucleon interactions

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    It is shown that the D--meson, whose light quark is the initial-pion valence quark and whose charmed quark is produced in annihilation of valence quarks and has got a large enough momentum, is really a leading meson in reactions like πp>DX\pi^- p -> DX. If such annihilation of valence quarks from initial hadrons is impossible there must be no distinct leading effect.Comment: 4 pages, 2.ps-figure

    Are direct search experiments sensitive to all spin-independent WIMP candidates?

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    The common analysis of direct searches for spin-independent Weakly Interacting Massive Particles (WIMPs) assumes that a spin-independent WIMP couples with the same strength with both nucleons, \textit{i.e.} that the spin-independent interaction is also fully isospin-independent. Though in a fully isospin-dependent interaction scenario the spin-independent WIMP-nucleus cross section is strongly quenched, the leading experiments are still sensitive enough to set limits 1-2 orders of magnitude less stringent than those traditionally presented. In the isospin-dependent scenario the difference between the limits of CDMS-II and ZEPLIN-I is significantly reduced. Here, a model-independent framework is discussed and applied to obtain the current general model-independent limits.Comment: 4 pages, 4 figures, revtex4.0, submitted to Phys. Rev. Let