Status of the GAMMA-400 project

Galper, A. M.; Adriani, O.; Aptekar, R.; Arkhangelskaja, I. V.; Arkhangelskiy, A. I.; Boezio, M.; Bonvicini, V.; Boyarchuk, K. A.; Gusakov, Y.; Farber, M. O.; Fradkin, M. I.; Kachanov, V.A.; Kaplin, V.; Kheymits, M. D.; Leonov, A. A.; Longo, F.; Maestro, P.; Marrocchesi, P. S.; Mazets, E.; Mocchiutti, E.; Моисеев, А. А.; 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.

doi:10.1016/j.asr.2012.01.019

Cited by 91 publications

(40 citation statements)

References 38 publications

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“…The plot also shows the corresponding value of the cross section into sharp gamma-ray spectral features ex-pected for a thermally produced dark matter particle, which lags well below the current limits, although for some choices of parameters it is only necessary a boost in the flux from annihilations by a factor of 5-10 to produce an observable signal. The next-generation of gamma ray telescopes GAMMA-400 42 and especially CTA, 43 will improve the limits by a factor of a few, depending on the energy, as shown in Fig. 6, lower plots.…”

Section: Gamma-raysmentioning

confidence: 99%

Signatures of Majorana dark matter with t-channel mediators

Garny

Ibarra

Vogl

2015

Int. J. Mod. Phys. D

146

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Three main strategies are being pursued to search for non-gravitational dark matter signals: direct detection, indirect detection and collider searches. Interestingly, experiments have reached sensitivities in these three search strategies which may allow detection in the near future. In order to take full benefit of the wealth of experimental data, and in order to confirm a possible dark matter signal, it is necessary to specify the nature of the dark matter particle and of the mediator to the Standard Model. In this paper, we focus on a simplified model where the dark matter particle is a Majorana fermion that couples to a light Standard Model fermion via a Yukawa coupling with a scalar mediator. We review the observational signatures of this model and we discuss the complementarity among the various search strategies, with emphasis in the well motivated scenario where the dark matter particles are produced in the early Universe via thermal freeze-out.

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Section: Gamma-raysmentioning

confidence: 99%

Signatures of Majorana dark matter with t-channel mediators

Garny

Ibarra

Vogl

2015

Int. J. Mod. Phys. D

146

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“…The GAMMA-400 instrument has developed to address a broad range of scientific goals, such as search for signatures of dark matter, studies of Galactic and extragalactic gamma-ray sources, Galactic and extragalactic diffuse emission, gamma-ray bursts, as well as high-precision measurements of spectra of cosmic-ray electrons, positrons, and nuclei (Galper et al, 2013). In this paper, the electron and proton separation methods for the GAMMA-400 gamma-ray telescope are presented.…”

Section: Introductionmentioning

confidence: 99%

Separation of electrons and protons in the GAMMA-400 gamma-ray telescope

Leonov

Galper

Bonvicini

et al. 2015

Advances in Space Research

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The GAMMA-400 gamma-ray telescope is intended to measure the fluxes of gamma rays and cosmic-ray electrons and positrons in the energy range from 100 MeV to several TeV. Such measurements concern with the following scientific goals: search for signatures of dark matter, investigation of gamma-ray point and extended sources, studies of the energy spectra of Galactic and extragalactic diffuse emission, studies of gamma-ray bursts and gamma-ray emission from the active Sun, as well as highprecision measurements of spectra of high-energy electrons and positrons, protons, and nuclei up to the knee.The main components of cosmic rays are protons and helium nuclei, whereas the part of lepton component in the total flux is ~10 -3 for high energies. In present paper, the capability of the GAMMA-400 gamma-ray telescope to distinguish electrons and positrons from protons in cosmic rays is investigated. The individual contribution to the proton rejection is studied for each detector system of the GAMMA-400 gammaray telescope. Using combined information from all detector systems allow us to provide the proton rejection from electrons with a factor of ~4×10 5 for vertical incident particles and ~3×10 5 for particles with initial inclination of 30 degrees. The calculations were performed for the electron energy range from 50 GeV to 1 TeV.

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“…Rather, one can consider the implications of the detection of a line signal with future experiments, such as GAMMA-400 [11] or Ç erenkov Telescope Array (CTA) [12], or the emergence of such a signal in the data from the Fermi satellite or ground-based gamma-ray detectors such as VERITAS [13] and HESS [14]. The ground-based CTA will have an effective area several orders of magnitude larger than the effective area of space-based telescopes, but will suffer from the background of cosmic ray-induced Ç erenkov showers.…”

Section: Introductionmentioning

confidence: 99%

Gamma rays from bino-like dark matter in the MSSM

Kumar

Sandick

2013

Phys. Rev. D

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We consider regions of the parameter space of the Minimal Supersymmetric Standard Model (MSSM) with bino-like neutralino dark matter in which a large fraction of the total dark matter annihilation cross section in the present era arises from annihilation to final states with monoenergetic photons. The region of interest is characterized by light sleptons and heavy squarks. We find that it is possible for the branching fraction to final states with monoenergetic photons to be comparable to that for continuum photons, but in those cases the total cross section will be so small that it is unlikely to be observable. For models where dark matter annihilation may be observable in the present era, the branching fraction to final states with monoenergetic photons is O(1 − 10%).

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Status of the GAMMA-400 project

Cited by 91 publications

References 38 publications

Signatures of Majorana dark matter with t-channel mediators

Signatures of Majorana dark matter with t-channel mediators

Separation of electrons and protons in the GAMMA-400 gamma-ray telescope

Gamma rays from bino-like dark matter in the MSSM

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