Searching for Decaying Axionlike Dark Matter from Clusters of Galaxies

Riemer-Sørensen, Signe; Zioutas, K.; Hansen, Steen H.; Pedersen, K.; Dahle, H.; Liolios, A.

doi:10.1103/physrevlett.99.131301

Cited by 23 publications

(30 citation statements)

References 22 publications

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“…During the last year a number of works appeared, devoted to search for the decay signal of a DM candidate -sterile neutrino -in the X-ray spectra of astrophysical objects [1,2,3,4,5,6,7,8,9]. Indeed, it was noticed long ago [10] that a right-handed neutrino with its mass in the keV range presents a viable warm dark matter (WDM) candidate.…”

Section: Sterile Neutrino As Wdm Candidatementioning

confidence: 99%

“…Namely, one simply requires that the DM decay line flux in a given narrow energy band does not exceed the total background flux in the same energy bin (c.f. [3,4,5,6,7]). Although such approach does not allow to detect a line, if it is present in the data, it permits to derive a "background model independent" bounds.…”

Section: Sensitivity Of X-ray Telescopes For Dm Detectionmentioning

confidence: 99%

“…To improve the existing bounds on DM parameters [1,2,3,4,5,6,7,8,9] using these instruments, one can look for the sources with optimized "signal-to-noise" ratio (as e.g. dwarf galaxies [3]) and study them with prolonged observations.…”

Section: Sensitivity Of X-ray Telescopes For Dm Detectionmentioning

confidence: 99%

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Search for the light dark matter with an X-ray spectrometer

Boyarsky

Herder

Neronov³

et al. 2007

Astroparticle Physics

118

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Sterile neutrinos with the mass in the keV range are interesting warm dark matter (WDM) candidates. The restrictions on their parameters (mass and mixing angle) obtained by current Xray missions (XMM-Newton or Chandra) can only be improved by less than an order of magnitude in the near future. Therefore the new strategy of search is needed. We compare the sensitivities of existing and planned X-ray missions for the detection of WDM particles with the mass ∼ 1−20 keV. We show that existing technology allows an improvement in sensitivity by a factor of 100. Namely, two different designs can achieve such an improvement: [A] a spectrometer with the high spectral resolving power of 0.1%, wide (steradian) field of view, with small effective area of about cm 2 (which can be achieved without focusing optics) or [B] the same type of spectrometer with a smaller (degree) field of view but with a much larger effective area of 10 3 cm 2 (achieved with the help of focusing optics). To illustrate the use of the "type A" design we present the bounds on parameters of the sterile neutrino obtained from analysis of the data taken by an X-ray microcalorimeter. In spite of the very short exposure time (100 sec) the derived bound is comparable to the one found from long XMM-Newton observation. I. STERILE NEUTRINO AS WDM CANDIDATE.During the last year a number of works appeared, devoted to search for the decay signal of a DM candidate -sterile neutrino -in the X-ray spectra of astrophysical objects [1,2,3,4,5,6,7,8,9]. Indeed, it was noticed long ago [10] that a right-handed neutrino with its mass in the keV range presents a viable warm dark matter (WDM) candidate. Such a particle would possess a specific radiative decay channel and therefore one can search for its decay line in the X-ray spectra of astrophysical objects [11,12].The recent spark of interest in the search for sterile neutrino DM has several reasons. First, for the direct search of a DM particle, a particle physics model is needed. Most of the particle physics candidates (axion, supersymmetric particles, etc.) would constitute cold dark matter (CDM). CDM models have several difficulties which could be resolved by a warm DM with the particle mass in the keV range. In particular, WDM can ease the problem of the dark halo structures in comparison with the CDM scenario [13,14,15]. Second, as the Standard Model of particle physics (SM) does not contain a DM candidate, most of the extensions of the SM ( like, for example, supersymmetry) require to assume the existence of many new particles and/or validity of new fundamental principles. Such extensions are not based on any available experimental data, but on theoretical arguments only. From this point of view, the extension of the SM with several right-handed neutrinos (i) is, maybe, a minimal extension of the SM one can imagine; (ii) is based on experimental data; (iii) provides naturally a warm DM candidate.Indeed, the existence of right-handed neutrino particles would provide the most natural explanation of neutrino oscill...

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Section: Sterile Neutrino As Wdm Candidatementioning

confidence: 99%

Section: Sensitivity Of X-ray Telescopes For Dm Detectionmentioning

confidence: 99%

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Search for the light dark matter with an X-ray spectrometer

Boyarsky

Herder

Neronov³

et al. 2007

Astroparticle Physics

118

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“…The radiative decay of keV neutrinos would contribute to the X-ray background [5,30]. Analysis from the X-ray background in clusters provide constraints on the masses and mixing angles of sterile neutrinos [9,31,32,33], and recently it has been suggested that precision laboratory experiments on β decay in tritium may be sensitive to ∼ keV neutrinos [34]. Being weak interaction singlets, sterile neutrinos can only be produced via their mixing with an active species, hence any assessment of the possibility of sterile neutrinos as dark matter candidates or their role in supernovae must begin with understanding their production mechanism.…”

Section: Introductionmentioning

confidence: 99%

Production of a sterile species: Quantum kinetics

Boyanovsky

2007

Phys. Rev. D

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Production of a sterile species is studied within an effective model of active-sterile neutrino mixing in a medium in thermal equilibrium. The quantum kinetic equations for the distribution functions and coherences are obtained from two independent methods: the effective action and the quantum master equation. The decoherence time scale for active-sterile oscillations is τ dec = 2/Γaa, but the evolution of the distribution functions is determined by the two different time scales associated with the damping rates of the quasiparticle modes in the medium: Γ1 = Γaa cos 2 θm ; Γ2 = Γaa sin 2 θm where Γaa is the interaction rate of the active species in absence of mixing and θm the mixing angle in the medium. These two time scales are widely different away from MSW resonances and preclude the kinetic description of active-sterile production in terms of a simple rate equation. We give the complete set of quantum kinetic equations for the active and sterile populations and coherences and discuss in detail the various approximations. A generalization of the active-sterile transition probability in a medium is provided via the quantum master equation. We derive explicitly the usual quantum kinetic equations in terms of the "polarization vector" and show their equivalence to those obtained from the quantum master equation and effective action.

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“…In addition, sterile neutrino has a radiative decay channel N → ν + γ, N → ν +γ, producing a narrow line in X-ray spectrum coming from dark matter halos of different astronomical objects. Recently a number of constraints on the mixing angle θ became available, coming from the analysis of X-ray data of Chandra and XMM-Newton satellites [19,20,21,22,23,24,25,26,27]. It is expected that the best results will come from the analysis of dwarf satellite galaxies in the Milky way halo, as having the largest mass-to-light ratios and weakest X-ray background [21].…”

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confidence: 99%

Searching for dark matter sterile neutrinos in the laboratory

Bezrukov

Shaposhnikov

2007

Phys. Rev. D

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If the dark matter of the Universe is made of sterile neutrinos with the mass in keV region they can be searched for with the help of X-ray satellites. We discuss the prospects of laboratory experiments that can be competitive and complimentary to Space missions. We argue that the detailed study of β decays of tritium and other nuclei with the help of Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS) can potentially enter into interesting parameter range and even supersede the current astronomical bounds on the properties of dark matter sterile neutrino.

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Searching for Decaying Axionlike Dark Matter from Clusters of Galaxies

Cited by 23 publications

References 22 publications

Search for the light dark matter with an X-ray spectrometer

Search for the light dark matter with an X-ray spectrometer

Production of a sterile species: Quantum kinetics

Searching for dark matter sterile neutrinos in the laboratory

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