Dark matter axions revisited

Visinelli, Luca; Gondolo, Paolo

doi:10.1103/physrevd.80.035024

Cited by 197 publications

(241 citation statements)

References 39 publications

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“…[77][78][79][80], using DarkSE [81,82], which is a package for DarkSusy. We created a grid in the M 2 -μ plane and performed interpolations to correct the values of the relic density and the present day neutralino annihilation within SuperBayeS interface.…”

Section: The Minimal Supersymmetric Standard Model After the Firsmentioning

confidence: 99%

Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection

2015

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Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection Diamanti, R.; Cabrera Catalan, M.E.; Ando, S. General rightsIt is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. Download date: 24 Mar 2019Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection We study how the kinetic decoupling of dark matter within a minimal supersymmetric extension of the standard model, by adopting nine independent parameters (MSSM-9), could improve our knowledge of the properties of the dark matter protohalos. We show that the most probable neutralino mass regions, which satisfy the relic density and the Higgs mass constraints, are those with the lightest supersymmetric neutralino mass around 1 TeV and 3 TeV, corresponding to Higgsino-like and winolike neutralino, respectively. The kinetic decoupling temperature in the MSSM-9 scenario leads to a most probable protohalo mass in a range of M ph ∼ 10 −12 -10 −7 M ⊙ . The part of the region closer to ∼2 TeV gives also important contributions from the neutralino-stau coannihilation, reducing the effective annihilation rate in the early Universe. We also study how the size of the smallest dark matter substructures correlates to experimental signatures, such as the spin-dependent and spin-independent scattering cross sections, relevant for direct detection of dark matter. Improvements on the spin-independent sensitivity might reduce the most probable range of the protohalo mass between ∼10 −9 M ⊙ and ∼10 −7 M ⊙ , while the expected spindependent sensitivity provides weaker constraints. We show how the boost of the luminosity due to dark matter annihilation increases, depending on the protohalo mass. In the Higgsino case, the protohalo mass is lower than the canonical value often used in the literature (∼10 −6 M ⊙ ), while hσvi does not deviate from hσvi ∼ 10 −26 cm 3 s −1 ; there is no significant enhancement of the luminosity. On the contrary, in the wino case, the protohalo mass is even lighter, and hσvi is two orders of magnitude larger; as its consequence, we see a substantial enhancement of the luminosity.

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Section: The Minimal Supersymmetric Standard Model After the Firsmentioning

confidence: 99%

Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection

2015

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“…Their known existence, combined with the fact that HDM cannot account for all the dark matter, is definitive evidence that the dark sector is multicomponent. Another theoretically well motivated, cosmologically important ingredient that may be necessary to explain curious features within the standard model of particle physics, namely the strong CP problem, is the (QCD-)axion [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] (for reviews of axion cosmology, see [41,42]). Depending upon their mass, axions can constitute the full range of dark matter "temperatures", from cold through warm to hot: a true feast for Goldilocks.…”

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confidence: 99%

Ultralight axions: Degeneracies with massive neutrinos and forecasts for future cosmological observations

et al. 2012

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A generic prediction of string theory is the existence of many axion fields. It has recently been argued that many of these fields should be light and, like the well known QCD axion, lead to observable cosmological consequences. In this paper we study in detail the effect of the so-called string axiverse on large scale structure, focusing on the morphology and evolution of density perturbations, anisotropies in the cosmic microwave background and weak gravitational lensing of distant galaxies. We quantify specific effects that will arise from the presence of the axionic fields and highlight possible degeneracies that may arise in the presence of massive neutrinos. We take particular care understanding the different physical effects and scales that come into play. We then forecast how the string axiverse may be constrained and show that with a combination of different observations, it should be possible to detect a fraction of ultralight axions to dark matter of a few percent.

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“…It can be produced at temperatures around 1 GeV via coherent oscillations with a relic abundance given by [12] Ω std a h 2 ≃ 0.23f (θ i )θ 2 i f a 10 12 GeV 7/6 (1.3) where the misalignment angle 0 < θ i < π and f (θ i ) is the anharmonicity factor. Visinelli and Gondolo [13] parametrize the latter as f (θ i ) = ln e 1−θ 2 i /π 2…”

Section: 2)mentioning

confidence: 99%

“…13) where BR(j → i) is the branching ratio for j → i + X decay times the multiplicity of i particles in the final state 8 . Once again we consider the integral: dp 2π 2 p 2 C dec (p, t)E α i = −Γ i dp 2π 2 p 2 m i E i F i (p, t)E α i +BR(j → i)Γ j m j dp…”

Section: A2 Decay Termmentioning

confidence: 99%

Dark radiation constraints on mixed Axion/Neutralino dark matter

Bae

Baer

Lessa

2013

J. Cosmol. Astropart. Phys.

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Recent analyses of CMB data combined with the measurement of BAO and H 0 show that dark radiation-parametrized by the apparent number of additional neutrinos ∆N ef f contributing to the cosmic expansion-is bounded from above by about ∆N ef f 1.6 at 95% CL. We consider the mixed axion/neutralino cold dark matter scenario which arises in R-parity conserving supersymmetric (SUSY) models wherein the strong CP problem is solved by hadronic axions with a concommitant axion(a)/saxion(s)/axino(ã) supermultiplet. Our new results include improved calculations of thermal axion and saxion production and include effects of saxion decay to axinos and axions. We show that the above bound on ∆N ef f is easily satisfied if saxions are mainly thermally produced and m LSP < mã m s . However, if the dominant mechanism of saxion production is through coherent oscillations, the CMB data provides a strong bound on saxion production followed by saxion decays to axions. Furthermore we show that scenarios with mixed neutralino/axion dark matter are highly constrained by combined CMB, BBN and Xe-100 constraints. In particular, supersymmetric models with a standard overabundance of neutralino dark matter are excluded for all values of the Peccei-Quinn breaking scale. Next generation WIMP direct detection experiments may be able to discover or exclude mixed axion-neutralino CDM scenarios where s → aa is the dominant saxion decay mode.

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Dark matter axions revisited

Cited by 197 publications

References 39 publications

Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection

Dark matter protohalos in a nine parameter MSSM and implications for direct and indirect detection

Ultralight axions: Degeneracies with massive neutrinos and forecasts for future cosmological observations

Dark radiation constraints on mixed Axion/Neutralino dark matter

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