Detecting WIMPs in the microwave sky

Blasi, Pasquale; Olinto, Angela V.; Tyler, Craig

doi:10.1016/s0927-6505(02)00166-4

Cited by 43 publications

(38 citation statements)

References 25 publications

(18 reference statements)

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“…Examples include gamma rays [514,515,516,517,518,519,520,521,522,523,524,525,526], lower energy photons such as radiowaves [516,527], and antimatter such as positrons and antiprotons [514,528,529,530,531,532,533,534,535]. The source of these cosmic rays will be concentrated towards the center of our galaxy.…”

Section: Neutralino Indirect Detectionmentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

415

339

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After an introduction recalling the theoretical motivation for low energy (100 GeV to TeV scale) supersymmetry, this review describes the theory and experimental implications of the soft supersymmetry-breaking Lagrangian of the general minimal supersymmetric standard model (MSSM). Extensions to include neutrino masses and nonminimal theories are also discussed. Topics covered include models of supersymmetry breaking, phenomenological constraints from electroweak symmetry breaking, flavor/CP violation, collider searches, and cosmological constraints including dark matter and implications for baryogenesis and inflation.

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Section: Neutralino Indirect Detectionmentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

415

339

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“…The neutrino annihilation limits in Ref. Synchroton radiation from the products of dark matter annihilation has been investigated in some detail [12][13][14][18][19][20][21][22][23]. More recently, it has been suggested that the microwave "haze" near the center of the Galaxy, observed by WMAP, could be synchrotron radiation from such annihilations [24][25][26].…”

mentioning

confidence: 99%

Toward a minimum branching fraction for dark matter annihilation into electromagnetic final states

2008

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Observational limits on the high-energy neutrino background have been used to place general constraints on dark matter that annihilates only into standard model particles. Dark matter particles that annihilate into neutrinos will also inevitably branch into electromagnetic final states through higher-order tree and loop diagrams that give rise to charged leptons, and these charged particles can transfer their energy into photons via synchrotron radiation or inverse Compton scattering. In the context of effective field theory, we calculate the loop-induced branching ratio to charged leptons and show that it is generally quite large, typically 1%, when the scale of the dark matter mass exceeds the electroweak scale, M W . For a branching fraction 3%, the synchrotron radiation bounds on dark matter annihilation are currently stronger than the corresponding neutrino bounds in the interesting mass range from 100 GeV to 1 TeV. For dark matter masses below M W , our work provides a plausible framework for the construction of a model for "neutrinos only" dark matter annihilations. 1While dark matter (DM) accounts for 25% of the total energy density in the universe (a classic review is [1]), direct detection remains elusive (see, e.g., Ref.[2] for a recent discussion). If the dark matter is a thermal relic, one would expect a non-neglible annihilation cross section, and one might hope to either detect the products of such annihilations occurring today, or to bound the properties of such particles by the non-observation of annihilation products.Recently, Beacom, Bell and Mack [3] made an interesting argument regarding such limits.They noted that if a dark matter particle (χ) couples only to Standard Model (SM) particles, then the most general limits can be derived by assuming annihilation into neutrinos, as these are the most difficult SM annihilation products to detect. Rather surprisingly, current observations place nontrivial bounds on such annihilations (see also Refs. [4,5] If the branching ratio into photons is taken to be larger, then the mass range over which the neutrino bounds dominate shrinks accordingly. Further, with the GLAST satellite [7] expected to launch in 2008, the photon limits will shortly be considerably tightened (or dark matter annihilation will be detected!).Thus, it is very interesting to determine what constitutes a "reasonable" minimum branching ratio into electrically-charged particles, for these in turn generate photons. We will assume a "neutrinos only" final state at tree level, and then calculate the branching into charged leptons that results from a higher-order box diagram. Note that a calculation similar in spirit was undertaken by Kachelriess and Serpico [8], who examined the electromagnetic mode from electroweak bremsstrahlung of real W and Z particles. In quantitative detail [9], it is found that the branching fraction of this process isM χ M W such that the electroweak bosons are produced on-shell; we have taken α = 1/128for the numerical value, as is appropriate at the...

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“…As main reference, we have used the work of Blasi et al [12]. We studied the whole decay process, both from analytical and Monte Carlo simulation point of view.…”

Section: Work Descriptionmentioning

confidence: 99%

“…Draco galaxy is particulary interesting as is the only known galaxy that shows evidence of a large dark-matter content [10] [11]. The reason why we are so interested in the synchrotron emission of WIMPs annihilation is that the predicted fluxes are in the microwave region, and may even exceed the CMB anisotropies signal in some frequencies [6][11] [12]. It seems particularly interesting, as we will soon dispone of the new WMAP data and, above all, it will be possible to recognize these clumps with the Planck satellite.…”

Section: Introductionmentioning

confidence: 99%

PLANCK: Detectability of Synchrotron emission by DM annihilation.

Presani¹,

Maris²,

Gregorio³

2007

Proceedings of CMB and Physics of the Early Universe — PoS(CMB2006)

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In recent years the possibility of indirect detection of WIMPs (Weak Interacting Massive Particles) by observing their final decay or annihilation by-products (gamma-rays, neutrinos, positrons) has been discussed in detail. In particular it has been pointed out as a possible detection method the observation of the synchrotron emission produced by high energy electrons and positrons propagating in the Galactic or in the halo magnetic field. We outline here a short resume of the activity carried out at our site in the framework of the Planck mission. We analyse the conditions in which synchrotron emission from WIMPs annihilation in DM clumps may be detected in Planck. We take into account the DM distribution profile in clumps, the possible range of neutralino masses and cross sections, the annihilation channels and the magnetic field.

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Detecting WIMPs in the microwave sky

Cited by 43 publications

References 25 publications

The soft supersymmetry-breaking Lagrangian: theory and applications

The soft supersymmetry-breaking Lagrangian: theory and applications

Toward a minimum branching fraction for dark matter annihilation into electromagnetic final states

PLANCK: Detectability of Synchrotron emission by DM annihilation.

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