Energy loss in low energy nuclear recoils in dark matter detector materials

Sassi, Sebastian; Heikinheimo, Matti; Tuominen, Kimmo; Kuronen, Antti; Byggmästar, Jesper; Nordlund, K.; Mirabolfathi, N.

doi:10.1103/physrevd.106.063012

Cited by 12 publications

(10 citation statements)

References 37 publications

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“…ELKO effective mass between 0.1 KeV and 0.2 KeV can explain the mass-ratio relation for dwarf galaxies as well as the rotation curves of large galaxies can be modeled with the mass of ELKO ∼ 23 eV [1,20]. On the other hand, for the case of laboratory DM searches associated to sample nucleon recoils, an excess in event rate for a WIMP with a mass of 5 GeV seems to be recently inferred in simulations over a large quantity of experimental data [12]. Phonon-mediated detection was considered with a careful analysis of energy losses for such processes.…”

Section: Introductionmentioning

confidence: 92%

“…We consider this order for m since it is the most kinematically favorable for xenon devices. There are very stringent limits for m 30 GeV [60], and also due to the recently obtained low energy excess for ∼ 5 GeV DM mass in precise simulations regarding energy losses for several phonon-mediated detection experiments [12].…”

Section: On the Non-polarized Compton-like And Pair Annihilation Proc...mentioning

confidence: 99%

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Fermionic dark matter-photon quantum interaction: A mechanism for darkness

Gracia¹,

Nogueira²,

Rocha³

2023

Preprint

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ELKO fermionic fields are prime candidates to describe dark matter, due to their intrinsic neutral nature, as they are constructed as eigenstates of the charge conjugation operator with dual helicity. To formulate the meaning of the darkness, the ELKO-photon coupling is scrutinized with a Pauli-like interaction, and the path integral is then formulated from the phase space constraint structure. Ward-Takahashi-like identities and Schwinger-Dyson equations, together with renormalizability, are employed to investigate a phenomenological mechanism to avoid external light signals. Accordingly, the non-polarized pair annihilation and Compton-like processes are shown to vanish at the limit of small scattering angles even if considering 1-loop radiative corrections, reinforcing the ELKO dark matter interpretation.However, ELKO interactions with nucleons are still possible. Motivated by recent nucleonrecoil experiments to detect dark matter, we furnish a consistent theoretical setup to describe ELKO-photon interaction compatible with the prevalence of darkness.

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Section: Introductionmentioning

confidence: 92%

Section: On the Non-polarized Compton-like And Pair Annihilation Proc...mentioning

confidence: 99%

Fermionic dark matter-photon quantum interaction: A mechanism for darkness

Gracia¹,

Nogueira²,

Rocha³

2023

Preprint

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“…The energy stored in the crystal lattice as a function of the nuclear recoil direction and energy were obtained from molecular dynamics (MD) simulations, described in [16]. We have simulated multiple materials, for which the numerical results can be obtained from online repository 1 .…”

Section: Energy Lossmentioning

confidence: 99%

“…The formation of defects stores a part of the recoil energy in the crystal, resulting in a quenching of the measured energy in phonons. At higher recoil energy this quenching factor becomes approximately constant and can be absorbed in the calibration of the energy scale, but for recoil energies close to the threshold displacement energy the effect can be highly nonlinear, affecting not just the overall energy calibration but also the shape of the measured recoil spectrum [15,16]. In diamond, the energy loss effect turns on sharply at 30 eV.…”

Section: Introductionmentioning

confidence: 99%

Energy loss due to defect creation in solid state detectors

Heikinheimo¹,

Sassi²,

Tuominen³

et al. 2022

Preprint

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The threshold displacement energy in solid state detector materials varies from several eV to 100 eV. If a stable or long lived defect is created as a result of a nuclear recoil event, some part of the recoil energy is stored in the deformed lattice and is therefore not observable in a phonon detector. Thus, an accurate model of this effect is necessary for precise calibration of the recoil energy measurement in low threshold phonon detectors. Furthermore, the sharpness of the defect creation threshold varies between materials. For a hard material such as diamond, the sharp threshold will cause a sudden onset of the energy loss effect, resulting in a prominent peak in the observed recoil spectrum just below the threshold displacement energy. We describe how this effect can be used to discriminate between nuclear and electron recoils using just the measured recoil spectrum.

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“…Recently, individual defects generated from nuclear recoils have been experimentally observed with a neutron source in silicon-based CCD [25], showing the possibility of discriminating nuclear recoils from electron recoils. Typically,the interaction of dark matter with nuclei of atoms generates a recoil energy of  keV ( ) [26][27][28][29][30]. The nuclear recoil energy can be observed via several mechanisms,such as the resulting ionization [31], scintillation light [32,33], or vibrations of the crystal lattice, i.e.…”

Section: Introductionmentioning

confidence: 99%

Daily and annual modulation rate of low mass dark matter in silicon detectors

Dinmohammadi,

Heikinheimo,

Mirabolfathi

et al. 2024

J. Phys. G: Nucl. Part. Phys.

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Low-threshold solid-state detectors with single electron excitation sensitivity can probe nuclear recoil energies in the sub-100 eV range, coinciding with the typical threshold displacement energies in the detector material. We investigate the daily and annual modulation of the observable event rate for dark matter mass ranging from 0.2 to 5 GeV/c^2 in a silicon detector, considering the energy threshold and the direction of the nuclear recoil. The data for the energy threshold is obtained from a molecular dynamics simulation. It is shown that the directional dependence of the threshold energy and the motion of the laboratory result in the modulation of the interaction event rate. We demonstrate silicon’s average annual interaction rate is more considerable than germanium for low-mass dark matter. However, their event rates take a similar trend in large dark matter masses. Thus, silicon can be a reliable target to discriminate low-mass dark matter from backgrounds. We also find 8-hour and 12-hour periodicities in the time series of event rates for silicon detectors due to the 45-degree symmetry in the silicon crystal structure.

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Energy loss in low energy nuclear recoils in dark matter detector materials

Cited by 12 publications

References 37 publications

Fermionic dark matter-photon quantum interaction: A mechanism for darkness

Fermionic dark matter-photon quantum interaction: A mechanism for darkness

Energy loss due to defect creation in solid state detectors

Daily and annual modulation rate of low mass dark matter in silicon detectors

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