Dark matter, dark photon and superfluid He-4 from effective field theory

Caputo, Andrea; Esposito, Angelo; Geoffray, Emma; Polosa, A. D.; Sun, S.

doi:10.1016/j.physletb.2020.135258

Cited by 28 publications

(14 citation statements)

References 72 publications

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“…In this case the dark matter can still deposit energy by producing one or more athermal phonons in the target. Such processes have been studied extensively in both superfluid He [35][36][37][38][39][40] and solid state targets [13,14,[41][42][43][44][45][46][47]. Given the existing constraints on models of sub-MeV dark matter, DM scattering through a dark photon mediator and dark photon DM absorption appear to be the most promising processes [48].…”

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confidence: 99%

DarkELF: A python package for dark matter scattering in dielectric targets

Knapen,

Kozaczuk,

Lin

2021

Preprint

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We present a python package to calculate interaction rates of light dark matter in dielectric materials, including screening effects. The full response of the material is parametrized in the terms of the energy loss function (ELF) of material, which DarkELF converts into differential scattering rates for both direct dark matter electron scattering and through the Migdal effect. In addition, DarkELF can calculate the rate to produce phonons from sub-MeV dark matter scattering via the dark photon mediator, as well as the absorption rate for dark matter comprised of dark photons. The package includes precomputed ELFs for Al, Al2O3, GaAs, GaN, Ge, Si, SiO2, and ZnS, and allows the user to easily add their own ELF extractions for arbitrary materials.

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confidence: 99%

DarkELF: A python package for dark matter scattering in dielectric targets

Knapen,

Kozaczuk,

Lin

2021

Preprint

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“…3. Write down an effective field theory (EFT) based on the spontaneous breaking of particle number symmetry, interpreting the acoustic phonon as a Goldstone mode and using measurements to fix the unknown coefficients in the effective action [83,[111][112][113]. This approach can be used for single and multi-excitation rates, but is limited to treating only the acoustic phonons in the excitation spectrum.…”

Section: Superfluid Heliummentioning

confidence: 99%

Searches for light dark matter using condensed matter systems

Kahn,

Lin

2021

Preprint

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Identifying the nature of dark matter (DM) has long been a pressing question for particle physics. In the face of ever-more-powerful exclusions and null results from large-exposure searches for TeV-scale DM interacting with nuclei, a significant amount of attention has shifted to lighter (sub-GeV) DM candidates. Direct detection of the light dark matter in our galaxy by observing DM scattering off a target system requires new approaches compared to prior searches. Lighter DM particles have less available kinetic energy, and achieving a kinematic match between DM and the target mandates the proper treatment of collective excitations in condensed matter systems, such as charged quasiparticles or phonons. In this context, the condensed matter physics of the target material is crucial, necessitating an interdisciplinary approach. In this review, we provide a self-contained introduction to direct detection of keV-GeV DM with condensed matter systems. We give a brief survey of dark matter models and basics of condensed matter, while the bulk of the review deals with the theoretical treatment of DM-nucleon and DM-electron interactions. We also review recent experimental developments in detector technology, and conclude with an outlook for the field of sub-GeV DM detection over the next decade.

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“…Owing to the continuous developments in detector technologies in recent years, the frontier of the dark matter direct detection has been pushed to the mass range below the GeV scale, where the traditional detection methods based on the nuclear scattering are expected to lose sensitivity. So more and more theorists and experimentalists have begun to shift to other alternative proposals based on new detection channels and materials, such as with semiconductors [1][2][3][4], Dirac materials [5][6][7], superconductors [8,9], superfluid helium [10][11][12], and via phonon excitations [13][14][15] and bremsstrahlung photons [16][17][18], as well as other proposals and analyses .…”

Section: Introductionmentioning

confidence: 99%

Describing the Migdal effect with a bremsstrahlung-like process and many-body effects

Liang,

Mo,

Zheng

et al. 2020

Preprint

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Recent theoretical studies have suggested that the suddenly recoiled atom struck by dark matter (DM) particle is much more likely to excite or lose its electrons than expected. Such Migdal effect provides a new avenue for exploring the sub-GeV DM particles. There have been various attempts to describe the Migdal effect in liquid and semiconductor targets. In this paper we incorporate the treatment of the bremsstrahlung process and the electronic many-body effects to give a full description of the Migdal effect in bulk semiconductor targets diamond and silicon. Compared with the results obtained with the atom-centered localized Wannier functions (WFs) under the framework of the tight-binding (TB) approximation, the method proposed in this study yields much larger event rates in the low energy regime, due to a ω −4 scaling. We also find that the effect of the bremsstrahlung photon mediating the Coulomb interaction between recoiled ion and the electron-hole pair is equivalent to that of the exchange of a single phonon.

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Dark matter, dark photon and superfluid He-4 from effective field theory

Cited by 28 publications

References 72 publications

DarkELF: A python package for dark matter scattering in dielectric targets

DarkELF: A python package for dark matter scattering in dielectric targets

Searches for light dark matter using condensed matter systems

Describing the Migdal effect with a bremsstrahlung-like process and many-body effects

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