Elastic and Inelastic Scattering of Cosmic-Rays on Sub-GeV Dark Matter

Guo, Gang; Tsai, Yue-Lin Sming; Wu, Meng-Ru; Yuan, Qiang

doi:10.48550/arxiv.2008.12137

Cited by 3 publications

(4 citation statements)

References 42 publications

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“…It is important to emphasize that a steeper energy dependence, as observed in the deep inelastic electron/neutrino-proton scatterings [26], could also be considered (see, e.g., refs. [22,23]). Such choice, which is expected to imply stronger bounds, will be analyzed in a forthcoming study, where we will estimate σ inel pχ assuming different models for the pχ interaction and a detailed description of the photon production in the proton fragmentation.…”

Section: Expected Vhe Gamma-ray Signalmentioning

confidence: 99%

“…Over the last decades, several models have been proposed to describe the proton-DM interactions, considering different assumptions for the couplings and properties of the mediator (see, e.g., refs. [22][23][24][25]). Alternatively, one can derive model-independent upper bounds on the inelastic cross-section σ inel pχ ( √ s), which should be satisfied by all models that intend to describe the inelastic proton-DM interaction.…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity to sub-GeV dark matter from cosmic-ray scattering with very-high-energy gamma-ray observatories

Reis,

Moulin,

Viana

et al. 2024

J. Cosmol. Astropart. Phys.

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Huge efforts have been deployed to detect dark matter (DM) in the GeV-TeV mass range involving various detection techniques, and led to strong constraints in the available parameter space. We compute here the sensitivity to sub-GeV DM that can be probed from the inevitable cosmic-ray scattering onto DM particles populating the Milky Way halo. Inelastic scattering of energetic cosmic rays off DM would produce high-energy gamma rays in the final state, providing a new avenue to probe the poorly-constrained so far sub-GeV dark matter mass range. In this work we derive sensitivity forecasts for the inelastic cosmic-ray proton-DM cross section for current and future very-high-energy gamma-ray observatories such as H.E.S.S., LHAASO, CTA and SWGO in the 100 eV to 100 MeV mass range. These inelastic cross section constraints are converted to the elastic proton-DM cross section to highlight further complementarity with cosmological, collider and direct detection searches. The sensitivity computed at 95% confidence level on the elastic cross section reaches ∼2 × 10-32 cm2 for a 100 keV DM mass for H.E.S.S.-like and ∼7 × 10-34 cm2 for a ∼1 keV DM mass for LHAASO. The sensitivity prospects for CTA and a strawman SWGO model reach ∼6 × 10-34 cm2 and ∼4 × 10-35 cm2, for DM masses of 10 keV and 1 keV, respectively. The sensitivity reach of the gamma-ray observatories considered here enables to probe an uncharted region of the DM mass-cross section parameter space.

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Section: Expected Vhe Gamma-ray Signalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sensitivity to sub-GeV dark matter from cosmic-ray scattering with very-high-energy gamma-ray observatories

Reis,

Moulin,

Viana

et al. 2024

J. Cosmol. Astropart. Phys.

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“…As shown in Eq. ( 1), are the numerical coefficients [51,52] and we show the coefficients of the proton and helium nucleus in Table 1. Considering that CRs are isotropic in the interstellar, we integrate the volume to obtain the differential CR flux :…”

Section: A Boosted Dm Flux From Crsmentioning

confidence: 99%

Constraints on cosmic-ray boosted dark matter in CDEX-10 *

2022

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Dark matter (DM) direct detection experiments have been setting strong limits on the DM-nucleon scattering cross section at the DM mass above a few GeV, but leave large parameter space unexplored in the low mass region. DM is likely to be scattered and boosted by relativistic cosmic rays in the expanding universe if it can generate nuclear recoils in direct detection experiments to offer observable signals. Since low energy threshold detectors using Germanium have provided good constraints on ordinary halo GeV-scale DM, it is necessary to re-analyze 102.8 kg$\times$day data in the CDEX-10 experiment assuming that DM is boosted by cosmic rays. For the DM mass range 1 keV $<m_\chi <$ 1 MeV and the effective distance within 1 kpc, we reach an almost flat floor limit at $8.32\times10^{-30}$ cm$^2$ on spin-independent DM-nucleon scattering cross section at a 90\% confidence level. The CDEX-10 result is able to close the gap unambiguously in the parameter space between MiniBooNE and XENON1T constraints which was partially hindered by the Earth attenuation effect. We also quantitatively calculate expected neutrino floor on searching for CRBDM in future direct detection experiments using Germanium. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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“…Furthermore, these interactions facilitate DM scattering off free leptons encountered on their journey towards Earth. We note that analogous boosting of DM can also be achieved in the context of hadrophilic DM models JCAP07(2024)045 due to energetic hadronic interactions of DM with cosmic rays, which has been extensively explored [13,[24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. Such DM interactions enable probing lighter sub-GeV DM masses with nucleon scattering by overcoming kinematic thresholds which impede cold non-relativistic DM searches in conventional noble element detectors [44].…”

Section: Introductionmentioning

confidence: 99%

Energy-dependent boosted dark matter from diffuse supernova neutrino background

Das,

Herbermann,

Sen

et al. 2024

J. Cosmol. Astropart. Phys.

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Diffuse neutrinos from past supernovae in the Universe present us with a unique opportunity to test dark matter (DM) interactions. These neutrinos can scatter and boost the DM particles in the Milky Way halo to relativistic energies allowing us to detect them in terrestrial laboratories. Focusing on generic models of DM-neutrino and electron interactions, mediated by a vector or a scalar boson, we implement energy-dependent scattering cross-sections and perform detailed numerical analysis of DM attenuation due to electron scattering in-medium while propagating towards terrestrial experiments. We set new limits on DM-neutrino and electron interactions for DM with masses in the range ∼ (0.1, 104) MeV, using recent data from XENONnT, LUX-ZEPLIN, and PandaX-4T direct detection experiments. We demonstrate that consideration of energy-dependent cross-sections for DM interactions can significantly affect constraints previously derived under the assumption of constant cross-sections, modifying them by multiple orders of magnitude.

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Elastic and Inelastic Scattering of Cosmic-Rays on Sub-GeV Dark Matter

Cited by 3 publications

References 42 publications

Sensitivity to sub-GeV dark matter from cosmic-ray scattering with very-high-energy gamma-ray observatories

Sensitivity to sub-GeV dark matter from cosmic-ray scattering with very-high-energy gamma-ray observatories

Constraints on cosmic-ray boosted dark matter in CDEX-10 *

Energy-dependent boosted dark matter from diffuse supernova neutrino background

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