Design and performance of the GAMMA-400 gamma-ray telescope for dark matter searches

Galper, A. M.; Adriani, O.; Aptekar, R.; Arkhangelskaja, I. V.; Arkhangelskiy, A. I.; Boezio, M.; Bonvicini, V.; Boyarchuk, K. A.; Fradkin, M. I.; Gusakov, Y.; Kaplin, V.; Kachanov, V.A.; Kheymits, M. D.; Leonov, A. A.; Longo, F.; Mazets, E.; Maestro, P.; Marrocchesi, P. S.; Mereminskiy, I. A.; Mikhailov, V. V.; Моисеев, А. А.; Mocchiutti, E.; Mori, N.; Moskalenko, I. V.; Naumov, P. Yu.; Papini, P.; Picozza, P.; Rodin, V. G.; Runtso, M. F.; Sparvoli, R.; Спиллантини, П.; Suchkov, S.; Tavani, M.; Topchiev, N. P.; Vacchi, A.; Vannuccini, E.; Yurkin, Y. T.; Zampa, N.; Zverev, V. G.; Zirakashvili, V. N.

doi:10.1063/1.4792586

Cited by 35 publications

(20 citation statements)

References 25 publications

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“…In addition, there will be improvements in sensitivities on all sources, and concurrent theoretical advances that will improve the understanding of their dark matter and astrophysical gamma-ray emission. Even extending beyond Fermi-LAT, Gamma-400, a Russian space-based mission that is designed to detect gamma rays in the energy range of 100 MeV to 3 TeV (Galper et al, 2012), will complement the above results.…”

Section: Indirect Detectionmentioning

confidence: 57%

Galactic searches for dark matter

2013

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For nearly a century, more mass has been measured in galaxies than is contained in the luminous stars and gas. Through continual advances in observations and theory, it has become clear that the dark matter in galaxies is not comprised of known astronomical objects or baryonic matter, and that identification of it is certain to reveal a profound connection between astrophysics, cosmology, and fundamental physics. The best explanation for dark matter is that it is in the form of a yet undiscovered particle of nature, with experiments now gaining sensitivity to the most well-motivated particle dark matter candidates. In this article, I review measurements of dark matter in the Milky Way and its satellite galaxies and the status of Galactic searches for particle dark matter using a combination of terrestrial and space-based astroparticle detectors, and large scale astronomical surveys. I review the limits on the dark matter annihilation and scattering cross sections that can be extracted from both astroparticle experiments and astronomical observations, and explore the theoretical implications of these limits. I discuss methods to measure the properties of particle dark matter using future experiments, and conclude by highlighting the exciting potential for dark matter searches during the next decade, and beyond.

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Section: Indirect Detectionmentioning

confidence: 57%

Galactic searches for dark matter

2013

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“…Those results demonstrate the importance of neutrino detectors such as IceCube and KM3Net for testing the properties of dark matter. Of course, deeper observations by Fermi and future detectors such as GAMMA-400 [95] should also provide us with crucial information.…”

Section: Summary and Discussionmentioning

confidence: 99%

Constraining very heavy dark matter using diffuse backgrounds of neutrinos and cascaded gamma rays

Murase¹,

Beacom²

2012

J. Cosmol. Astropart. Phys.

142

168

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Abstract. We consider multi-messenger constraints on very heavy dark matter (VHDM) from recent Fermi gamma-ray and IceCube neutrino observations of isotropic background radiation. Fermi data on the diffuse gamma-ray background (DGB) shows a possible unexplained feature at very high energies (VHE), which we have called the "VHE Excess" relative to expectations for an attenuated power law extrapolated from lower energies. We show that VHDM could explain this excess, and that neutrino observations will be an important tool for testing this scenario. More conservatively, we derive new constraints on the properties of VHDM for masses of 10 3 -10 10 GeV. These generic bounds follow from cosmic energy budget constraints for gamma rays and neutrinos that we developed elsewhere, based on detailed calculations of cosmic electromagnetic cascades and also neutrino detection rates. We show that combining both gamma-ray and neutrino data is essential for making the constraints on VHDM properties both strong and robust. In the lower mass range, our constraints on VHDM annihilation and decay are comparable to other results; however, our constraints continue to much higher masses, where they become relatively stronger.

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“…One should also note that for neutralino DM, e.g., there is only a factor of a few missing in the annihilation rate to explain the observed excess [11]-something which might be possible to achieve by a larger normalization due to a higher local DM density than assumed here [64] or an increased DM density near the galactic center due to the presence of baryons, as found in a very recent simulation of a Milky Way-like galaxy [65]. It will thus be exciting to await experiments with improved energy resolution and/or statistics, like GAMMA-400 [66] or HESS-II [67], that will be able to distinguish between the peculiar spectrum of internal bremsstrahlung and a monochromatic line [26]. In this Appendix, we provide for convenience some practical tools for the actual calculation of the ratio between loop-and tree-level cross section.…”

Section: Discussionmentioning

confidence: 89%

130 GeV gamma-ray line and generic dark matter model building constraints from continuum gamma rays, radio, and antiproton data

et al. 2013

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An analysis of the Fermi gamma-ray space telescope data has recently revealed a resolved gamma-ray feature close to the galactic center which is consistent with monochromatic photons at an energy of about 130 GeV. If interpreted in terms of dark matter (DM) annihilating into (Z, h), this would correspond to a DM particle mass of roughly 130 GeV (145 GeV, 155 GeV). The rate for these loop-suppressed processes, however, is larger than typically expected for thermally produced DM. Correspondingly, one would generically expect even larger tree-level production rates of standard model fermions or gauge bosons. Here, we quantify this expectation in a rather model-independent way by relating the tree level and loop amplitudes with the help of the optical theorem. As an application, we consider bounds from continuum gamma rays, radio, and antiproton data on the tree-level amplitudes and translate them into constraints on the loop amplitudes. We find that, independently of the DM production mechanism, any DM model aiming at explaining the line signal in terms of charged standard model particles running in the loop is in rather strong tension with at least one of these constraints, with the exception of loops dominated by top quarks. We stress that attempts to explain the 130 GeV feature with internal bremsstrahlung do not suffer from such difficulties.

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Design and performance of the GAMMA-400 gamma-ray telescope for dark matter searches

Cited by 35 publications

References 25 publications

Galactic searches for dark matter

Galactic searches for dark matter

Constraining very heavy dark matter using diffuse backgrounds of neutrinos and cascaded gamma rays

130 GeV gamma-ray line and generic dark matter model building constraints from continuum gamma rays, radio, and antiproton data

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