Can annihilating dark matter be lighter than a few GeVs?

Bœhm, Céline; Enßlin, T. A.; Silk, Joseph

doi:10.1088/0954-3899/30/3/004

Cited by 168 publications

(230 citation statements)

References 40 publications

Supporting

Mentioning

220

Contrasting

Unclassified

Order By: Relevance

“…Finally, indirect signatures of the light neutralino (including synchrotron emission, see Ref. [59]) will be investigated in a future work. Note added: After submitting this paper, we became aware of another preprint [60] which also finds that light neutralinos in the NMSSM can have large elastic scattering cross sections through the exchange of a light scalar Higgs.…”

Section: Discussionmentioning

confidence: 99%

“…In case of a multi component dark matter scenario, there could be either very light e.g. [44][45][46][47] or very heavy particles (including very heavy neutralinos), depending on the findings of direct detection experiments.…”

Section: Methodsmentioning

confidence: 99%

“…This work was followed by other claims (using supersymmetric extensions of the Standard Model [20][21][22][23][24][25]) to explain CoGeNT and/or CDMS events. However, light MSSM neutralinos were in fact investigated before these experimental claims [15,19,[26][27][28] and just after the study of the astrophysical signatures that are to be expected from light WIMPs [29]. Neutralino masses down to ∼ 5 GeV were found.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2010

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Theories predict a stable relic particle, in thermal equilibrium during the early Universe, with mass between 1 and 100 MeV [35]. Such models attracted some interest about a decade ago because they would naturally explain the 511-keV emission line toward the galactic bulge [36,126].…”

Section: Antimatter and Wimp Dark Mattermentioning

confidence: 99%

The e-ASTROGAM mission

et al. 2017

View full text Add to dashboard Cite

e-ASTROGAM ('enhanced ASTROGAM') is a breakthrough Observatory space mission, with a detector composed by a Silicon tracker, a calorimeter, and an anticoincidence system, dedicated to the study of the non-thermal Universe in the photon energy range from 0.3 MeV to 3 GeV -the lower energy limit can be pushed to energies as low as 150 keV, albeit with rapidly degrading angular resolution, for the tracker, and to 30 keV for calorimetric detection. The mission is based on an advanced space-proven detector technology, with unprecedented sensitivity, angular and energy resolution, combined with polarimetric capability. Thanks to its performance in the MeV-GeV domain, substantially improving its predecessors, e-ASTROGAM will open a new window on the non-thermal Universe, making pioneering observations of the most powerful Galactic and extragalactic sources, elucidating the nature of their relativistic outflows and their effects on the surroundings. With a line sensitivity in the MeV energy range one to two orders of magnitude better than previous generation instruments, e-ASTROGAM will determine the origin of key isotopes fundamental for the understanding of supernova explosion and the chemical evolution of our Galaxy. The mission will provide unique data of significant interest to a broad astronomical community, complementary to powerful observatories such as LIGO-Virgo-GEO600-KAGRA, SKA, ALMA, E-ELT, TMT, LSST, JWST, Athena, CTA, IceCube, KM3NeT, and the promise of eLISA.

show abstract

“…[43,44]. These decays in more complex, less fine-tuned models [45,46], in which the light scalars couple to new heavy fermions or a new light Uð1Þ 0 gauge boson, have been calculated in Refs. [47][48][49].…”

Section: Introductionmentioning

confidence: 99%

Rare meson decays into very light neutralinos

Dreiner¹,

Grab²,

Koschade

et al. 2009

Phys. Rev. D

View full text Add to dashboard Cite

We investigate the bounds on the mass of the lightest neutralino from rare meson decays within the minimal supersymmetric standard model (MSSM) with and without minimal flavor violation. We present explicit formulas for the two-body decays of mesons into light neutralinos and perform the first complete calculation of the loop-induced decays of kaons to pions and light neutralinos and B mesons to kaons and light neutralinos. We find that the supersymmetric branching ratios are strongly suppressed within the MSSM with minimal flavor violation, and that no bounds on the neutralino mass can be inferred from experimental data, i.e., a massless neutralino is allowed. The branching ratios for kaon and B meson decays into light neutralinos may, however, be enhanced when one allows for nonminimal flavor violation. We find new constraints on the MSSM parameter space for such scenarios and discuss prospects for future kaon and B meson experiments. Finally, we comment on the search for light neutralinos in monojet signatures at the Tevatron and at the LHC.

show abstract

Can annihilating dark matter be lighter than a few GeVs?

Abstract: We estimate the gamma ray fluxes from the residual annihilations of Dark Matter particles having a mass m dm ∈ [ MeV, O( GeV)] and compare them to observations. We find that particles lighter than O(100 MeV) are excluded unless their cross section is S-wave suppressed.

Cited by 168 publications

References 40 publications

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

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

The e-ASTROGAM mission

Rare meson decays into very light neutralinos

Contact Info

Product

Resources

About