Constraints on light dark matter particles using white dwarf stars

Panotopoulos, Grigoris; Lopes, Ilídio

doi:10.1142/s0218271820500583

Cited by 21 publications

(16 citation statements)

References 61 publications

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“…1. For the EFT operators the collider constraints from Belle II and LEP on sub-GeV DM are found to be much stronger than the DMDD limits, including the constraints from SENSEI [63], CDMS-HVeV [61], DAMIC [62], XENON10 [1], XENON1T [2], DMDD limits via solar reflection [18], and white dwarfs [9][10][11][12][13][14]. The constraint on σe from white dwarfs, as shown in Fig.…”

Section: Mono-photon Constraints On Eft Operatorsmentioning

confidence: 94%

“…Currently, the xenon target experiments and SENSEI provide the leading DMDD constraints to sub-GeV DM. Astrophysical processes can also give competitive constraints to sub-GeV DM, for example, heating constraints in white dwarfs due to DM [9][10][11][12][13][14]. Furthermore, interactions between sub-GeV DM and cosmic rays [15][16][17], and Sun [18,19] can significantly alter the velocity of the DM particle, and thus enhance the sensitivity of the DMDD experiments.…”

Section: Introductionmentioning

confidence: 99%

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Probing sub-GeV leptophilic dark matter at Belle II and NA64

Liang,

Liu,

Yang

2021

Preprint

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We study the Belle II constraints on the sub-GeV dark matter that interacts with charged leptons. Two kinds of models with different interaction mechanisms between dark matter and charged leptons are considered in the analysis: the EFT operators and the light mediator models. The Belle II monophoton constraints on the EFT operators are found to be of similar size as the LEP constraints. However, for the light mediator models, the Belle II mono-photon constraints can be much stronger than the LEP limits. For both EFT operators and the light mediator models, the Belle II limits can be several orders of magnitude stronger than the current dark matter direct detection limits, as well as the white dwarf limit. The light mediator can also be searched for in the leptonic decay final states, which is complementary to the mono-photon channel and can even become the better discovery channel for certain parameter space.

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Section: Mono-photon Constraints On Eft Operatorsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Probing sub-GeV leptophilic dark matter at Belle II and NA64

Liang,

Liu,

Yang

2021

Preprint

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“…Consequently, very large ambient DM densities would be required for purely kinetic heating of WDs to be significant, even at the geometric capture rate. One way to deposit more energy is for captured DM to annihilate inside the WD [11,[43][44][45]. After the initial scattering event that captures a DM particle into a bound orbit, further scatterings will cause the particle to lose more energy, thermalizing it down into a smaller volume within the WD, where it may annihilate with other captured DM particles.…”

Section: Observational Signaturesmentioning

confidence: 99%

Dark matter scattering in astrophysical media: collective effects

DeRocco,

Galanis,

Lasenby

2022

Preprint

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It is well-known that stars have the potential to be excellent dark matter detectors. Infalling dark matter that scatters within stars could lead to a range of observational signatures, including stellar heating, black hole formation, and modified heat transport. To make robust predictions for such phenomena, it is necessary to calculate the scattering rate for dark matter inside the star. As we show in this paper, for small enough momentum transfers, this requires taking into account collective effects within the dense stellar medium. These effects have been neglected in many previous treatments; we demonstrate how to incorporate them systematically, and show that they can parametrically enhance or suppress dark matter scattering rates depending on how dark matter couples to the Standard Model. We show that, as a result, collective effects can significantly modify the potential discovery or exclusion reach for observations of compact objects such as white dwarfs and neutron stars. While the effects are more pronounced for dark matter coupling through a light mediator, we show that even for dark matter coupling via a heavy mediator, scattering rates can differ by orders of magnitude from their naive values for dark matter masses 100 MeV. We also illustrate how collective effects can be important for dark matter scattering in more dilute media, such as the Solar core. Our results demonstrate the need to systematically incorporate collective effects in a wide range of astroparticle contexts; to facilitate this, we provide expressions for in-medium self-energies for a variety of different media, which are applicable to many other processes of interest (such as particle production).

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“…Internal heating can also be important for WDs. This was recently analysed in [42]. These authors studied the case of relatively light weakly interacting massive particles thermalized in compact objects and compared theoretical predictions on additional luminosity with observations of 10 WDs in a globular cluster M4.…”

Section: Annihilation and Heatingmentioning

confidence: 99%

“…Let us compare it to the number that can be accumulated according to Equation (11). Assuming the NS lifetime of 1 Gyr Equation (11) implies the total accumulated amount of 8 × 10 42 GeV in the conditions typical for the Milky Way, regardless of the DM mass. Dividing by the mass and requiring that the resulting number is larger than that of Equation (21), one finds the condition m 10 7 GeV, (23) in agreement with the results of Ref.…”

Section: Bh Formation and Star Destructionmentioning

confidence: 99%

Astroparticle Physics with Compact Objects

2021

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Probing the existence of hypothetical particles beyond the Standard model often deals with extreme parameters: large energies, tiny cross-sections, large time scales, etc. Sometimes, laboratory experiments can test required regions of parameter space, but more often natural limitations lead to poorly restrictive upper limits. In such cases, astrophysical studies can help to expand the range of values significantly. Among astronomical sources, used in interests of fundamental physics, compact objects—neutron stars and white dwarfs—play a leading role. We review several aspects of astroparticle physics studies related to observations and properties of these celestial bodies. Dark matter particles can be collected inside compact objects resulting in additional heating or collapse. We summarize regimes and rates of particle capturing as well as possible astrophysical consequences. Then, we focus on a particular type of hypothetical particles—axions. Their existence can be uncovered due to observations of emission originated due to the Primakoff process in magnetospheres of neutron stars or white dwarfs. Alternatively, they can contribute to the cooling of these compact objects. We present results in these areas, including upper limits based on recent observations.

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Constraints on light dark matter particles using white dwarf stars

Cited by 21 publications

References 61 publications

Probing sub-GeV leptophilic dark matter at Belle II and NA64

Probing sub-GeV leptophilic dark matter at Belle II and NA64

Dark matter scattering in astrophysical media: collective effects

Astroparticle Physics with Compact Objects

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