Resolving XENON excess with decaying cold dark matter

Xu, Shuai; Zheng, Sibo

doi:10.1140/epjc/s10052-021-09262-x

Cited by 8 publications

(2 citation statements)

References 48 publications

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“…Along with the freeze-in production, another key feature of this model is the late-time decay of φ, either through a tree-level channel φ → ¯ in the mass region m φ > 2m or a looplevel channel φ → γγ in the mass region m φ < 2m . DM with a late-time decay is of interest in cosmic ray anomalies [19][20][21], an excess of recoil electrons at XENON1T [22][23][24], and Hubble tension [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39]. The Hubble tension is a ∼ 5σ discrepancy between the measurements on Hubble parameter H 0 derived from Planck [40] and local experiments [41,42].…”

Section: Jhep09(2023)182mentioning

confidence: 99%

Freeze-in dark matter via lepton portal: Hubble tension and stellar cooling

Xu,

Zhang

et al. 2023

J. High Energ. Phys.

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We propose a new freeze-in dark matter candidate which feebly couples to the standard model charged leptons. The feeble interactions allow it (i) to freeze-in from the Standard Model thermal bath with its relic density being either a fraction or the entirety of the observed dark matter density and (ii) to radiatively decay to two photons in the dark matter mass ranges of order keV scale with lifetime larger than the age of Universe. These features make this model a realistic realization of dark matter with late-time decay to reduce Hubble tension. We show the best-fit value of H0 = 68.31(69.34) km s−1Mpc−1 in light of Planck 2018+BAO(+LSS)+Pantheon data sets. We then use stellar cooling data to place constraints on the parameter space favored by the Hubble tension. While the universal coupling scenario is excluded, the hierarchical coupling scenario can be tested by future observations of white dwarfs after a careful look into photon inverse decay, Primakoff and Bremsstrahlung emission of the dark matter in various stellar systems. The viable parameter space may be linked to anomalies in future X-ray telescopes.

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Section: Jhep09(2023)182mentioning

confidence: 99%

Freeze-in dark matter via lepton portal: Hubble tension and stellar cooling

Xu,

Zhang

et al. 2023

J. High Energ. Phys.

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“…In the literature, there are many models involving the existence of DM decays at latetimes, such as models with R-parity violation [83,84], super Weakly Interacting Massive particles (super WIMPs) [85][86][87][88], sterile neutrinos [89,90] or models with an additional U(1) gauge symmetry [91][92][93][94]. Besides cosmic tensions, some DCDM models were proposed as a way to explain the excess of events in the electronic recoils reported by the Xenon1T collaboration [69,76,[95][96][97]. In addition, DCDM models with massive daughters have also been suggested as a potential solution to the small (subgalactic) scales structure problem of CDM (e.g.…”

Section: Introductionmentioning

confidence: 99%

Constraining decaying dark matter with BOSS data and the effective field theory of large-scale structures

Simon,

Abellán,

et al. 2022

Preprint

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We update cosmological constraints on two decaying dark matter models in light of BOSS-DR12 data analyzed under the Effective Field Theory of Large-Scale Structures (EFTofLSS) formalism, together with Planck, Pantheon and other BOSS measurements of the baryonic acoustic oscillation (BAO). In the first model, a fraction f dcdm of cold dark matter (CDM) decays into dark radiation (DR) with a lifetime τ . In the second model (recently suggested as a potential resolution to the S8 tension), all the CDM decays with a lifetime τ into DR and a massive warm dark matter (WDM) particle, with a fraction ε of the CDM rest mass energy transferred to the DR. Using numerical codes from the recent literature, we perform the first calculation of the mildly non-linear (matter and galaxy) power spectra with the EFTofLSS for these two models. In the case of DR products, we obtain the constraints f dcdm 0.022 (95% C.L.) for lifetimes shorter than the age of the universe, and τ /f dcdm 250 Gyr in the long-lived regime assuming f dcdm → 1. We show that Planck data contributes the most to these constraints, with EFTofBOSS providing a marginal improvement over conventional BAO and redshift space distortions (f σ8) data. In the case of DR and WDM decay products, we find that EFTofBOSS data significantly improves the constraints at 68% C.L. on the CDM lifetime with a S8 prior from KiDS-1000. We show that, in order to fit EFTofBOSS data while lowering S8 to match KiDS-1000, the best-fit model has a longer lifetime τ = 120 Gyr, with a larger kick velocity v kick /c ε 1.2%, than that without EFTofBOSS (τ = 43 Gyr, ε = 0.6%). We anticipate that future surveys will provide exquisite constraints on such models.1 More precisely, there even exists a 'lensing is low' anomaly when comparing galaxy clustering and weak lensing data within the ΛCDM cosmology [4][5][6].

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A next-generation liquid xenon observatory for dark matter and neutrino physics

Aalbers

AbdusSalam

Abe

et al. 2022

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

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The nature of dark matter and properties of neutrinos are among the most pressing issues in contemporary particle physics. The dual-phase xenon time-projection chamber is the leading technology to cover the available parameter space for weakly interacting massive particles, while featuring extensive sensitivity to many alternative dark matter candidates. These detectors can also study neutrinos through neutrinoless double-beta decay and through a variety of astrophysical sources. A next-generation xenon-based detector will therefore be a true multi-purpose observatory to significantly advance particle physics, nuclear physics, astrophysics, solar physics, and cosmology. This review article presents the science cases for such a detector.

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Resolving XENON excess with decaying cold dark matter

Cited by 8 publications

References 48 publications

Freeze-in dark matter via lepton portal: Hubble tension and stellar cooling

Freeze-in dark matter via lepton portal: Hubble tension and stellar cooling

Constraining decaying dark matter with BOSS data and the effective field theory of large-scale structures

A next-generation liquid xenon observatory for dark matter and neutrino physics

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