Constraint on the axion-electron coupling constant and the neutrino magnetic dipole moment by using the tip-RGB luminosity of fifty globular clusters

Díaz, Santiago Arceo; Schröder, K.-P.; Zuber, Κ.; Jack, D.; Barrios, E E Bricio

doi:10.48550/arxiv.1910.10568

Cited by 28 publications

(46 citation statements)

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“…The other two possible explanations pursued in [1] are solar axions and anomalous neutrino interactions [2,3]. However, the preferred values of couplings in the latter two cases have already been ruled out by existing astrophysical constraints, particularly from stellar cooling [4][5][6][7]. Furthermore, it is well known that the observed excess in electron recoils cannot be due to typical dark matter (DM) particles scattering on electrons, since a DM particle moving at virial velocity, i.e.…”

Section: Introductionmentioning

confidence: 99%

Boosted Dark Matter Interpretation of the XENON1T Excess

Fornal,

Sandick,

Shu

et al. 2020

Preprint

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We propose boosted dark matter (BDM) as a possible explanation for the excess of keV electron recoil events observed by XENON1T. BDM particles have velocities much larger than those typical of virialized dark matter, and, as such, BDM-electron scattering can naturally produce keV electron recoils. We show that the required BDM-electron scattering cross sections can be easily realized in a simple model with a heavy vector mediator. Though these cross sections are too large for BDM to escape from the Sun, the BDM flux can originate from the Galactic Center or from halo dark matter annihilations. Furthermore, a daily modulation of the BDM signal will be present, which could not only be used to differentiate it from various backgrounds, but would also provide important directional information for the BDM flux.

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Section: Introductionmentioning

confidence: 99%

Boosted Dark Matter Interpretation of the XENON1T Excess

Fornal,

Sandick,

Shu

et al. 2020

Preprint

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“…For example, the XENON1T has discussed the sizable neutrino magnetic moment as a candidate for such a nonstandard interaction. However, the best fit value is in tension with constraints from the white dwarfs and the globular clusters [9]. Refs.…”

Section: Introductionmentioning

confidence: 89%

Cosmological Constraint on Vector Mediator of Neutrino-Electron Interaction in light of XENON1T Excess

Ibe,

Kobayashi,

Nakayama

et al. 2020

Preprint

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Recently, the XENON1T collaboration reported an excess in the electron recoil energy spectrum. One of the simplest new physics interpretation is a new neutrino-electron interaction mediated by a light vector particle. However, for the parameter region favored by this excess, the constraints from the stellar cooling are severe. Still, there are astrophysical uncertainties on those constraints. In this paper, we discuss the constraint on the light mediator from the effective number of neutrino N eff in the CMB era, which provides an independent constraint. We show that N eff is significantly enhanced and exceeds the current constraint in the parameter region favored for the XENON1T excess. As a result, the interpretation by a light mediator heavier than about 1 eV is excluded by the N eff constraint.

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“…It has been postulated that the hypothetical effects from e.g., solar axions or the neutrino magnetic moment can account for the XENON1T data. However, the required model parameters are found to be in conflict with other constraints, particularly the astrophysical observations [4][5][6][7][8]. Alternatively, several attempts [9][10][11][12][13] have been proposed to explain the XENON1T data.…”

Section: Introductionmentioning

confidence: 98%

Sun Heated MeV-scale Dark Matter and the XENON1T Electron Recoil Excess

Chen,

Cui,

Shu

et al. 2020

Preprint

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The XENON1T collaboration reported an excess of the low-energy electron recoil events between 1 and 7 keV. We propose to explain such an anomaly by the MeV-scale dark matter (DM) heated by the interior of the Sun due to the same DM-electron interaction as in the detector. The kinetic energies of heated DM particles can reach a few keV, and naturally account for the excess signals detected by XENON1T. The inferred DM-electron scattering cross-section is about 0.1 pb, which is consistent with current observations. This model does not rely on any special assumptions on DM models, which serves as a general explanation of the XENON1T anomaly via DM-electron interaction. The spectrum of the Sun-heated DM is typically soft comparing to other boosted DM, so the small recoil events are expected to be abundant in this scenario. Future direct detection experiments with lower thresholds can distinguish this scenario with other boosted DM models or solar axion models.

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Constraint on the axion-electron coupling constant and the neutrino magnetic dipole moment by using the tip-RGB luminosity of fifty globular clusters

Cited by 28 publications

References 0 publications

Boosted Dark Matter Interpretation of the XENON1T Excess

Boosted Dark Matter Interpretation of the XENON1T Excess

Cosmological Constraint on Vector Mediator of Neutrino-Electron Interaction in light of XENON1T Excess

Sun Heated MeV-scale Dark Matter and the XENON1T Electron Recoil Excess

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