Lower limit on the neutralino mass in the general MSSM

Bélanger, G.; Boudjema, F.; Cottrant, A.; Pukhov, A.; Rosier‐Lees, S.

doi:10.1088/1126-6708/2004/03/012

Cited by 75 publications

(77 citation statements)

References 140 publications

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“…For µ < 0, we again found that the Likelihood of the points is much smaller than for µ > 0, owing mainly to the (g − 2) µ constraint which disfavours large values of tan β as well as low values of M 2 and ml [15].…”

Section: Fig 5: Same As Inmentioning

confidence: 67%

“…1 represents Q/Q max , the weigth normalized to the best weight, with respect to the free parameters that we have considered. The first plot shows that the bino mass is peaked around M 1 ∈ [15,19] GeV while the second plot shows that µ is below 150 GeV. That is, it is near the lower bound that satisfies the LEP limits on charginos.…”

Section: A Neutralino Masses Smaller Than 15 Gevmentioning

confidence: 93%

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Can neutralinos in the MSSM and NMSSM scenarios still be light?

et al. 2010

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Since the recent results of direct detection experiments at low mass, many authors have revisited the case of light (1 -10) GeV WIMPs. In particular, there have been a few attempts to explain the results from the DAMA/LIBRA, CDMS and/or CoGeNT experiments by invoking neutralinos lighter than 15 GeV. Here we show that in the MSSM, such light particles are completely ruled out by the TEVATRON limits on the mass of the pseudoscalar Higgs. On the contrary, in the NMSSM, we find that light neutralinos could still be viable candidates. In fact, in some cases, they may even have an elastic scattering cross section on nucleons in the range that is needed to explain either the DAMA/LIBRA, CoGeNT or CDMS recent results. Finally, we revisit the lowest limit on the neutralino mass in the MSSM and find that neutralinos should be heavier than ∼ 28 GeV to evade present experimental bounds.

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Section: Fig 5: Same As Inmentioning

confidence: 67%

Section: A Neutralino Masses Smaller Than 15 Gevmentioning

confidence: 93%

Can neutralinos in the MSSM and NMSSM scenarios still be light?

et al. 2010

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“…For early works addressing limits on light neutralino Dark Matter, see e.g. [11][12][13], and for limits on (very) light neutralinos without cosmological bounds we refer to refs. [14,15] and references therein.…”

Section: Jhep11(2014)106mentioning

confidence: 99%

LHC tests of light neutralino dark matter without light sfermions

Calibbi

Lindert

Ota

et al. 2014

J. High Energ. Phys.

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Abstract:We address the question how light the lightest MSSM neutralino can be as dark matter candidate in a scenario where all supersymmetric scalar particles are heavy. The hypothesis that the neutralino accounts for the observed dark matter density sets strong requirements on the supersymmetric spectrum, thus providing an handle for collider tests. In particular for a lightest neutralino below 100 GeV the relic density constraint translates into an upper bound on the Higgsino mass parameter µ in case all supersymmetric scalar particles are heavy. One can define a simplified model that highlights only the necessary features of the spectrum and their observable consequences at the LHC. Reinterpreting recent searches at the LHC we derive limits on the mass of the lightest neutralino that, in many cases, prove to be more constraining than dark matter experiments themselves.

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“…Assuming R-parity conservation, the neutralino is stable and a good dark matter candidate. Accelerator searches and relic density constraints from WMAP data allow a lower limit to be set on the mass of the MSSM neutralino [4]. Typical lower limits for m χ 0 1 from such studies lie around 20 GeV, depending on the values chosen for tanβ, the ratio of the vacuum expectation values of the two neutral Higgses.…”

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confidence: 99%

Multiyear search for dark matter annihilations in the Sun with the AMANDA-II and IceCube detectors

Abbasi¹,

Abdou²,

Abu‐Zayyad³

et al. 2012

Phys. Rev. D

113

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A search for an excess of muon-neutrinos from dark matter annihilations in the Sun has been performed with the AMANDA-II neutrino telescope using data collected in 812 days of livetime between 2001 and 2006 and 149 days of livetime collected with the AMANDA-II and the 40-string configuration of IceCube during 2008 and early 2009. No excess over the expected atmospheric neutrino background has been observed. We combine these results with the previously published IceCube limits obtained with data taken during 2007 to obtain a total livetime of 1065 days. We provide an upper limit at 90% confidence level on the annihilation rate of captured neutralinos in the Sun, as well as the corresponding muon flux limit at the Earth, both as functions of the neutralino mass in the range 50 GeV-5000 GeV. We also derive a limit on the neutralino-proton spin-dependent and spin-independent cross section. The limits presented here improve the previous results obtained by the collaboration between a factor of two and five, as well as extending the neutralino masses probed down to 50 GeV. The spin-dependent cross section limits are the most stringent so far for neutralino masses above 200 GeV, and well below direct search results in the mass range from 50 GeV to 5 TeV.

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Lower limit on the neutralino mass in the general MSSM

Cited by 75 publications

References 140 publications

Can neutralinos in the MSSM and NMSSM scenarios still be light?

Can neutralinos in the MSSM and NMSSM scenarios still be light?

LHC tests of light neutralino dark matter without light sfermions

Multiyear search for dark matter annihilations in the Sun with the AMANDA-II and IceCube detectors

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