Light mediators in dark matter direct detections

Miao, Sen; Zhou, Yu‐Feng

doi:10.1088/1475-7516/2015/03/032

Cited by 35 publications

(65 citation statements)

References 156 publications

(249 reference statements)

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“…Low mass multipole DM has been studied by several groups in the context of anomalies in direct detection experiments [10,[23][24][25][26][27][28][29][30]. We note that low mass multipole DM has also found applications in addressing the longstanding solar abundance problem (discrepancies between solar spectroscopy and helioseismology) [47].…”

Section: Collider Studymentioning

confidence: 90%

“…The first is to connect to the rather extensive body of literature on direct detection prospects for this class of DM models. Electromagnetic anapole and dipole DM has been investigated in the context of experiments like DAMA, CDMS, XENON, and LUX by several groups [10,[23][24][25][26][27][28][29][30], and projections for the future LZ experiment based on a simple scaling of the scattering cross section have been given in [17,18]. At the level of the EFT, the reach in the cutoff scale Λ obtained from our collider study can be mapped onto a reach in the value of the anapole moment A through Eq.…”

Section: Introductionmentioning

confidence: 97%

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Collider detection of dark matter electromagnetic anapole moments

2018

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Dark matter that interacts with the Standard Model by exchanging photons through higher multipole interactions occurs in a wide range of both strongly and weakly coupled hidden sector models. We study the collider detection prospects of these candidates, with a focus on Majorana dark matter that couples through the anapole moment. The study is conducted at the effective field theory level with the mono-Z signature incorporating varying levels of systematic uncertainties at the high-luminosity LHC. The projected collider reach on the anapole moment is then compared to the reach coming from direct detection experiments like LZ. Finally, the analysis is applied to a weakly coupled completion with leptophilic dark matter.

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Section: Collider Studymentioning

confidence: 90%

Section: Introductionmentioning

confidence: 97%

Collider detection of dark matter electromagnetic anapole moments

2018

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“…In many well-motivated DM models, the DM particles do not couple to the SM particles directly, but through some light color-singlet mediator particles, which has rich phenomenological consequences in DM annihilation [10][11][12], self-scatterings [13][14][15] and solar capture [16,17], and direct detections [18,19]. In this scenario, for the same DM mass, the resulting energy spectrum of final state particle from DM annihilation can be significantly different from the case without a mediator.…”

mentioning

confidence: 99%

Antiprotons from dark matter annihilation through light mediators and a possible excess in AMS-02 p¯/p data

Huang

Wei

et al. 2017

Phys. Rev. D

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We show that in the scenario where dark matter (DM) particles annihilate through light mediators, the energy spectra of the final state cosmic-ray particles depend strongly on the mediator mass. For final state antiprotons, a spectrum with relatively narrow peak occurs when the mediator mass is comparable to thepp production threshold. Of interest, the latest AMS-02 data on thep/p flux ratio hint at a bump-like excess over the expected background in the energy range ∼ 100 − 450 GeV. We show that such a light mediator scenario is favoured by the latest AMS-02 data over the scenarios of DM direct annihilation into the standard model particles and that of antiprotons produced from inside supernova remnants (SNRs), and is consistent with the upper limits derived from the Fermi-LAT data on the gamma rays towards the dwarf spheroidal galaxies. Thep/p flux ratio with energy above 450 GeV is predicted to fall with energy quickly, which can be easily distinguished from the other two scenarios as they predict the ratio to be flattening or rising up to multi-TeV region.Introduction. Cosmic-ray (CR) antiparticles such as positrons and antiprotons are relatively rare and sensitive to exotic contributions. In recent years, an excess over the expected background in CR positrons has been observed [1]. The spectral feature of the excess plays an important role in identifying its origin such as nearby astrophysical sources or dark matter (DM) interactions. Recently, the AMS-02 collaboration published the measurement on the antiproton to proton (p/p) flux ratio up to kinetic energy 450 GeV, based on four years of data taking [2], confirming the first preliminary result presented in the year 2015 [3]. Although the measured kinetic energy spectrum ofp/p ratio is in overall agreement with the secondary production especially below ∼ 100 GeV [4,5], at higher energies, there is a trend of flattening and smooth rise in the range ∼ 100 − 260 GeV, followed by a drop by ∼ 30% in the range ∼ 260 − 450 GeV. Such a hint of a bump-like excess has already been observed in the preliminary AMS-02 result [3], and is strengthened in the latest data with higher statistics.

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“…Note that both the scalar-nucleon SN and fermion-nucleon χN scatterings are mediated by the two Higgs particles h 1,2 . As h 2 is assumed to be light, we need to take into account its light mediator effect in the DM-nucleon interactions [86,87]. The scattering of the fermionic DM χ against nucleon is induced at one-loop order as shown in Fig.…”

Section: Dark Matter Direct Detectionmentioning

confidence: 99%

Strong dark matter self-interaction from a stable scalar mediator

Duch

Grza̧dkowski

Huang

2020

J. High Energ. Phys.

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In face of the small-scale structure problems of the collisionless cold dark matter (DM) paradigm, a popular remedy is to introduce a strong DM self-interaction which can be generated nonperturbatively by a MeV-scale light mediator. However, if such the mediator is unstable and decays into SM particles, the model is severely constrained by the DM direct and indirect detection experiments. In the present paper, we study a model of a self-interacting fermionic DM, endowed with a light stable scalar mediator. In this model, the DM relic abundance is dominated by the fermionic DM particle which is generated mainly via the freeze-out of its annihilations to the stable mediator. Since this channel is invisible, the DM indirect detection constraints should be greatly relaxed. Furthermore, the direct detection signals are suppressed to an unobservable level since fermionic DM scatterings with a nucleon appear at one-loop level. By further studying the bounds from the CMB and BBN on the visible channels involving the dark sector, we show that there is a large parameter space which can generate appropriate DM self-interactions at dwarf galaxy scales, while remaining compatible with other experimental constraints.

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Light mediators in dark matter direct detections

Cited by 35 publications

References 156 publications

Collider detection of dark matter electromagnetic anapole moments

Collider detection of dark matter electromagnetic anapole moments

Antiprotons from dark matter annihilation through light mediators and a possible excess in AMS-02 p¯/p data

Strong dark matter self-interaction from a stable scalar mediator

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