Constraints on dark matter annihilation from CMB observations before Planck

Lopez-Honorez, Laura; Mena, Olga; Palomares‐Ruiz, Sergio; Vincent, Aaron C.

doi:10.1088/1475-7516/2013/07/046

Cited by 92 publications

(146 citation statements)

References 134 publications

(247 reference statements)

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“…the diffuse γ-ray background in the Milky Way and its companion galaxies (dwarf spheroidals), as well as from distortions of the cosmic microwave background (CMB) and both high energy positrons and antiprotons. Altogether these measurements already rule out the simplest 1 thermal, velocity independent, dark matter scenarios with a mass ranging from a few MeV [2,3] to ∼100 GeV (see e.g. [4][5][6][7][8][9][10]), but here we show that one can go a step further.…”

Section: Introductionsupporting

confidence: 63%

Ruling out thermal dark matter with a black hole induced spiky profile in the M87 galaxy

2015

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Citation for published item:vroixD homs nd foehmD g¡ eline nd ilkD toseph @PHISA 9uling out therml drk mtter with lk hole indued spiky pro(le in the wVU glxyF9D hysil review hFD WP @RAF HRQSIHF Further information on publisher's website: eprinted with permission from the emerin hysil oietyX vroixD homs nd foehmD g¡ eline nd ilkD toseph @PHISA 9uling out therml drk mtter with lk hole indued spiky pro(le in the wVU glxyF9D hysil review hFD WP @RAF HRQSIHF PHIS y the emerin hysil oietyF eders my viewD rowseD ndGor downlod mteril for temporry opying purposes onlyD provided these uses re for nonommeril personl purposesF ixept s provided y lwD this mteril my not e further reproduedD distriutedD trnsmittedD modi(edD dptedD performedD displyedD pulishedD or sold in whole or prtD without prior written permission from the emerin hysil oietyF Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Using the spectral energy distribution of M87, a nearby radio galaxy in the Virgo cluster, and assuming a supermassive black hole induced spike in the dark matter halo profile, we exclude any dark matter candidate with a velocity-independent (s-wave) annihilation cross-section of the order of hσvi ∼ 10 −26 cm 3 s −1 and a mass up to Oð100Þ TeV. These limits supersede all previous constraints on thermal, s-wave, annihilating dark matter candidates by orders of magnitude, and rule out the entire canonical mass range. We remark in addition that, under the assumption of a spike, dark matter particles with a mass of a few TeV and an annihilation cross-section of ∼10 −27 cm 3 s −1 could explain the TeV γ-ray emission observed in M87. A central dark matter spike is plausibly present around the supermassive black hole at the center of M87, for various, although not all, formation scenarios, and would have profound implications for our understanding of the dark matter microphysics.

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Section: Introductionsupporting

confidence: 63%

Ruling out thermal dark matter with a black hole induced spiky profile in the M87 galaxy

2015

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“…Constraints from CMB distortions are largely insensitive to systematic uncertainties [96][97][98][99][100][101][102], and with the latest CMB data from Planck correspond to the limit [89] f eff σv m χ 3 × 10 −28 cm 3 /s/GeV . (5.5)…”

Section: Indirect Detectionmentioning

confidence: 99%

Explaining dark matter and B decay anomalies with an L μ − L τ model

Altmannshofer

Gori

Profumo

et al. 2016

J. High Energ. Phys.

179

118

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We present a dark sector model based on gauging the L µ − L τ symmetry that addresses anomalies in b → sµ + µ − decays and that features a particle dark matter candidate. The dark matter particle candidate is a vector-like Dirac fermion coupled to the Z gauge boson of the L µ − L τ symmetry. We compute the dark matter thermal relic density, its pair-annihilation cross section, and the loop-suppressed dark matter-nucleon scattering cross section, and compare our predictions with current and future experimental results. We demonstrate that after taking into account bounds from B s meson oscillations, dark matter direct detection, and the CMB, the model is highly predictive: B physics anomalies and a viable particle dark matter candidate, with a mass of ∼ (5 − 23) GeV, can be accommodated only in a tightly-constrained region of parameter space, with sharp predictions for future experimental tests. The viable region of parameter space expands if the dark matter is allowed to have L µ − L τ charges that are smaller than those of the SM leptons.

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“…One particular indirect detection method is to observe the effect of dark matter annihilation early in the history of the Universe (1400 > z > 100) on the CMB temperature and polarization anisotropies [1][2][3][4][5][6][7][8][9][10][11]. If dark matter particles self-annihilate at a sufficient rate, the expected signal would be directly sensitive to the thermally averaged cross section hσvi of the dark matter particles in this epoch, the mass M χ of the annihilating particle, and the particular annihilation channel.…”

Section: Introductionmentioning

confidence: 99%

Current dark matter annihilation constraints from CMB and low-redshift data

2014

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Updated constraints on the dark matter cross section and mass are presented combining cosmic microwave background (CMB) power spectrum measurements from Planck, WMAP9, ACT, and SPT as well as several low-redshift data sets (BAO, HST, and supernovae). For the CMB data sets, we combine WMAP9 temperature and polarization data for l ≤ 431 with Planck temperature data for 432 ≤ l ≤ 2500, ACT and SPT data for l > 2500, and Planck CMB four-point lensing measurements. We allow for redshiftdependent energy deposition from dark matter annihilation by using a "universal" energy absorption curve. We also include an updated treatment of the excitation, heating, and ionization energy fractions and provide an updated deposition efficiency factors (f eff ) for 41 different dark matter models. Assuming perfect energy deposition (f eff ¼ 1) and a thermal cross section, dark matter masses below 26 GeV are excluded at the 2σ level. Assuming a more generic efficiency of f eff ¼ 0.2, thermal dark matter masses below 5 GeV are disfavored at the 2σ level. These limits are a factor of ∼2 improvement over those from WMAP9 data alone. These current constraints probe, but do not exclude, dark matter as an explanation for reported anomalous indirect detection observations from AMS-02/PAMELA and the Fermi gamma-ray inner-Galaxy data. They also probe relevant models that would explain anomalous direct detection events from CDMS, CRESST, CoGeNT, and DAMA, as originating from a generic thermal weakly interacting massive particle. Projected constraints from the full Planck release should improve the current limits by another factor of ∼2 but will not definitely probe these signals. The proposed CMB Stage IV experiment will more decisively explore the relevant regions and improve upon the Planck constraints by another factor of ∼2.

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Constraints on dark matter annihilation from CMB observations before Planck

Cited by 92 publications

References 134 publications

Ruling out thermal dark matter with a black hole induced spiky profile in the M87 galaxy

Ruling out thermal dark matter with a black hole induced spiky profile in the M87 galaxy

Explaining dark matter and B decay anomalies with an L μ − L τ model

Current dark matter annihilation constraints from CMB and low-redshift data

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