The moment of truth for WIMP dark matter

Bertone, Gianfranco

doi:10.1038/nature09509

Cited by 138 publications

(126 citation statements)

References 71 publications

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“…Given that b = 4π 2 a/m [34], where a is the s-wave scattering length, the optimal form of the wave function of the condensed state can be obtained by solving equation (8), to wit…”

Section: The Generalized Gross-pitaevskii Equation and The Thomasmentioning

confidence: 99%

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Constraints on Bose-Einstein-condensed axion dark matter from the Hi nearby galaxy survey data

2014

Phys. Rev. D

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One of the leading candidates for dark matter is axion or axion-like particle in a form of BoseEinstein condensate (BEC). In this paper, we present an analysis of 17 high-resolution galactic rotation curves from "The HI Nearby Galaxy Survey (THINGS)" data [F. Walter et al., Astron. J. 136, 2563] in the context of the axionic Bose-Einstein condensed dark matter model. Assuming a repulsive two-body interaction, we solve the non-relativistic Gross-Pitaevskii equation for N gravitationally trapped bosons in the Thomas-Fermi approximation. We obtain the maximum possible radius R and the mass profile M (r) of a dilute axionic Bose-Einstein condensed gas cloud. A standard least-χ 2 method is employed to find the best-fit values of the total mass M of the axion BEC and its radius R. The local mass density of BEC axion dark-matter is ρa ≃ 0.02 GeV/cm 3 , which agrees with that presented by Beck [C. Beck, Phys. Rev. Lett. 111, 231801 (2013)]. The axion mass ma we obtain depends not only on the best-fit value of R but also on the s-wave scattering length a (ma ∝ a 1/3 ). The transition temperature Ta of axion BEC on galactic scales is also estimated. Comparing the calculated Ta with the ambient temperature of galaxies and galaxy clusters implies that a ∼ 10 −3 fm. The corresponding axion mass is ma ≃ 0.58 meV. We compare our results with others.

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“…Given that b = 4π 2 a/m [34], where a is the s-wave scattering length, the optimal form of the wave function of the condensed state can be obtained by solving equation (8), to wit…”

Section: The Generalized Gross-pitaevskii Equation and The Thomasmentioning

confidence: 99%

“…The substance has been dubbed "dark matter" since the essence of it still remains obscure. Besides weakly interacting massive particles (WIMPs) [8] and sterile neutrinos [9,10], axion is a leading candidate for dark matter [11,12].…”

Section: Introductionmentioning

confidence: 99%

Constraints on Bose-Einstein-condensed axion dark matter from the Hi nearby galaxy survey data

2014

Phys. Rev. D

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“…As discussed above, finding ( ) analytically (corresponding to the density distribution ∼ −3 5 ) which produces a rotation curve in exact agreement with that of Milky way is not easy at all. However, an oversimplified choice of ( ) for galaxies like Milky way with almost flat rotation curve may be taken as a simple ansatz ( ) = ln (20) for which we obtain…”

Section: Rotation Curvementioning

confidence: 99%

“…There are lots of apparent pieces of evidence to show that dark matter exist, such as cosmic microwave background, dark matter in the Bullet Cluster, and large-scale matter power spectra [19][20][21][22][23][24]. However, as of yet no direct evidence of the existence of dark matter has been found.…”

Section: Liquid-droplet Model and Dark Mattermentioning

confidence: 99%

Liquid-Droplet as a model for the rotation curve problem

Darabi

2014

Open Physics

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Abstract:The dynamics of large scale gravitational structures like galaxies, local groups and clusters is studied based on the so-called Liquid-Droplet model describing the saturation property of the nuclear force. Using the assumption that the gravitational force is also saturated over large scale structures, it is argued that the Newtonian gravitational potential may be replaced by an effective Machian gravitational potential. Application of this new potential at these large scale structures may give the rotation curves in good agreement with observations. Then, the virial theorem for this kind of gravitational interaction is developed and also the Tully-Fisher relation is obtained. A physical explanation is given for the so-called constant acceleration in the MOND as the effective gravitational strength of these structures. Finally, a brief argument is given for comparison with dark matter models. PACS (

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“…5,15 Detection or generation of dark matter particles has now become an extremely active research area in particle physics. 16,17 So far, however, none of the experiments aiming to generate and detect dark matter particles have been successful. 18 As an alternative to dark matter, modi¯ed Newtonian dynamics (MOND) theory has also been proposed.…”

Section: Introductionmentioning

confidence: 99%

Dark Matter or Additional Gravitational Forces Generated by Non-Spherical Mass Distributions?

2017

Rep. Adv. Phys. Sci.

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The measured orbital velocity distributions of stars in galaxies and the observed gravitational lensing e®ects in galaxy clusters suggest that there should be more mass than that can be explained by the visible mass of stars, gas and dust in the galaxies. This unseen mass or matter, generally referred to as dark matter, has puzzled physicists for a few decades and has now become one of the greatest unsolved mysteries in modern science. So far, all of the e®orts aiming to generate and detect the exotic dark matter substance have yielded negative results. Here, starting from Newton's law of gravity, we show that the spherical mass distribution models originally employed for estimating the masses of galaxies could cause the discrepancy between the actual masses and those calculated from the rotational velocities. It is demonstrated that additional gravitational e®ects are generated from non-spherical mass distributions in the cosmic structures. The currently observed rotation curves and gravitational lensing e®ects in galaxies and galaxy clusters could be explained under the frameworks of Newtonian gravity and Einstein's general theory of relativity when proper mass distributions are considered.

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The moment of truth for WIMP dark matter

Cited by 138 publications

References 71 publications

Constraints on Bose-Einstein-condensed axion dark matter from the Hi nearby galaxy survey data

Constraints on Bose-Einstein-condensed axion dark matter from the Hi nearby galaxy survey data

Liquid-Droplet as a model for the rotation curve problem

Dark Matter or Additional Gravitational Forces Generated by Non-Spherical Mass Distributions?

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