A review of indirect searches for particle dark matter

Gaskins, Jennifer

doi:10.1080/00107514.2016.1175160

Cited by 337 publications

(335 citation statements)

References 506 publications

(613 reference statements)

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“…Additionally, searches for DM particle candidates at the weak scale have been until now unsuccessful with current instruments, on ground and in space. In particular, attempts of indirect detection of high-energy photons from WIMP self-annihilation provide some among the strongest limits on WIMP DM [3,4]. At this stage, it is unclear if the WIMP (and cold DM) paradigm has to be revised in favour of other, still viable, DM particle models (warm and ultra-light DM models), or if it is instead kinematically outside of the main explored range and can be discovered with the next generation of gamma-ray telescopes, e.g.…”

Section: Introductionmentioning

confidence: 99%

Gamma-Ray Sensitivity to Dark Matter Subhalo Modelling at High Latitudes

2019

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Searches for "dark" subhaloes in gamma-ray point-like source catalogues are among promising strategies for indirect dark matter detection. Such a search is nevertheless affected by uncertainties related, on the one hand, to the modelling of the dark matter subhalo distribution in Milky-Way-like galaxies, and, on the other hand, to the sensitivity of gamma-ray instruments to the dark matter subhalo signals. In the present work, we assess the detectability of dark matter subhaloes in Fermi-LAT catalogues, taking into accounts uncertainties associated with the modelling of the Galactic subhalo population. We use four different halo models bracketing a large set of uncertainties. For each model, adopting an accurate detection threshold of the LAT to dark matter subhalo signals and comparing model predictions with the number of unassociated point-sources in Fermi-LAT catalogues, we derive upper limits on the annihilation cross section as a function of dark matter mass. Our results show that, even in the best-case scenario (i.e. DMonly subhalo model), which does not include tidal disruption from baryons, the limits on the dark matter parameter space are less stringent than current gamma-ray limits from dwarf spheroidal galaxies. Comparing the results obtained with the different subhalo models, we find that baryonic effects on the subhalo population are significant and lead to dark matter constraints that are less stringent by a factor of ∼2 to ∼5. This uncertainty comes from the unknown resilience of dark matter subhaloes to tidal disruption.

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Section: Introductionmentioning

confidence: 99%

Gamma-Ray Sensitivity to Dark Matter Subhalo Modelling at High Latitudes

2019

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“…The differential gamma ray flux produced due to WIMP-like DM annihilation in a given region of the sky (∆Ω) and observed at the Earth reads [78][79][80][81][82]:…”

Section: A Indirect Detection Of the Dark Mattermentioning

confidence: 99%

Minimal model of torsion mediated dark matter

et al. 2020

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We present a minimal model of fermionic dark matter (DM), where a singlet Dirac fermion can interact with the Standard Model (SM) particles via the torsion field of gravitational origin. In general, torsion can be realized as an antisymmetric part of the affine connection associated with the spacetime diffeomorphism symmetry and thus can be thought of as a massive axial vector field. Because of its gravitational origin, the torsion field couples to all the fermion fields including the DM with equal strength, which makes the model quite predictive. The DM is naturally stable without any imposition of ad-hoc symmetry e.g., Z 2 .Apart from producing the correct thermal abundance, singlet fermion can easily evade the stringent bounds on the spin-independent DM-nucleon direct detection cross-section due to its axial nature. However, in the allowed parameter space, strong bounds can be placed on the torsion mass and its couplings to fermions from the recent LHC searches. Assuming a non universal torsion-DM and torsion-SM coupling, smaller values of torsion masses may become allowed. In both cases we also study the reach of spin-dependent direct detection searches of the DM. * bb1988@iitg.ac.in † tapobroto.bhanja@iitg.ac.in ‡ debottam@iopb.res.in § debu@iitg.res.in

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“…However, the nature of the DM particles remains mysterious and has become one of the most appealing open challenges for modern science. To analyze and investigate the underlying physics of DM particles, there are various worldwide projects working on the DM detection, such as direct and indirect searches, collider experiments and astrophysical signatures arising from DM self-interactions [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Production and constraints for a massive dark photon at electron-positron colliders *

Jiang

et al. 2020

Chinese Phys. C

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Dark sectors may couple to the Standard Model via one or more mediator particles. In this paper, we discuss two types of mediators: the dark photon A and the dark scalar mediator φ. The total cross sections and various differential distributions of signal processes of e + e − → qqA and e + e − → qqφ (q = u, d, c, s and b quarks) are discussed, and then we focus on an invisible A study due to the cleaner background processes at future e + e − colliders. It is found that kinematic distributions of the two-jet system can be used to identify or exclude the dark photon and dark scalar mediator, as well as distinguish between them. We further study the possibility of the search for dark photon at future CEPC experiment with √ s = 91.2 GeV and 240 GeV. Running at √ s = 91.2 GeV, it is possible for CEPC to perform a decisive measurement on dark photon (20 GeV < m A < 60 GeV) in less than one operating year. The lower limits of integrated luminosity for significance S/ √ B = 2σ, 3σ and 5σ are presented. * Given the intricate structure of the Standard Model (SM), which describes only a sub-dominant component of the universe, it would not be too surprising if the dark sector contains a rich structure itself, with DM making up parts of it. In the dark sector, the DM particles do not interact directly to the known strong, weak and electromagnetic forces except for gravitational force. However, there is typically one or more mediator particles which are coupled with SM as the "portal" [16][17][18][19][20][21]. Such extended interactions associating dark sector and SM depend on the spin and parity: mediators can be vector A , scalar φ, pseudoscalar a, axial-vector Z and even fermions N .A new force mediated by dark photons has a subject of deep interest in the high energy particle physics. The existence of the dark photon [22][23][24], associated to a hidden U (1) gauge interaction, has been the object of many investigations, both theoretically and experimentally. Substantial efforts have been put by several authors into the search for a dark photon through various processes including bremsstrahlung process e − Z → e − ZA [25-28], meson decays process π 0 /η/η → γA , [32,33], annihilation process e + e − → γA [34-38], etc., and physicists have obtained stringent limits of the kinetic mixing parameter ε for a given dark photon mass m A [17,18,24,39,40]. For m A 1 GeV, only limited values of ε are allowed. For the heavy massive dark photon, a wide range is still not excluded by current ongoing experiments.The future high energy electron-positron colliders can provide an opportunity to search for the dark sector mediators. This kind of colliders include CEPC [41], ILC [42], FCC-ee [43] and CLIC [44] with the center-of-energy √ s varying from 91.2 GeV to 1 TeV. In this paper, assuming that dark mediators interact only with quarks, we investigate the production of dark photon A and dark scalar mediator φ at electron-positron colliders with √ s = 91.2 GeV, 240 GeV, 500GeV and 1 TeV. We analyze the cross sections and the normalized ki...

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A review of indirect searches for particle dark matter

Cited by 337 publications

References 506 publications

Gamma-Ray Sensitivity to Dark Matter Subhalo Modelling at High Latitudes

Gamma-Ray Sensitivity to Dark Matter Subhalo Modelling at High Latitudes

Minimal model of torsion mediated dark matter

Production and constraints for a massive dark photon at electron-positron colliders *

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