ORCID Profile
0000-0001-5672-6079
Current Organisation
Texas A&M University
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Publisher: Zenodo
Date: 2019
Publisher: IOP Publishing
Date: 29-06-2011
Publisher: Elsevier BV
Date: 05-2017
Publisher: Deutsches Elektronen-Synchrotron, DESY, Hamburg
Date: 2015
Publisher: American Physical Society (APS)
Date: 12-02-2018
Publisher: American Physical Society (APS)
Date: 21-03-2017
Publisher: American Physical Society (APS)
Date: 15-02-2019
Publisher: IOP Publishing
Date: 22-12-2022
Abstract: 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.
Publisher: American Physical Society (APS)
Date: 22-12-2021
Publisher: American Physical Society (APS)
Date: 13-11-2017
Publisher: American Physical Society (APS)
Date: 08-04-2016
Publisher: American Astronomical Society
Date: 30-07-2018
Publisher: American Astronomical Society
Date: 06-2022
Abstract: We use a recent census of the Milky Way (MW) satellite galaxy population to constrain the lifetime of particle dark matter (DM). We consider two-body decaying dark matter (DDM) in which a heavy DM particle decays with lifetime τ comparable to the age of the universe to a lighter DM particle (with mass splitting ϵ ) and to a dark radiation species. These decays impart a characteristic “kick velocity,” V kick = ϵ c , on the DM daughter particles, significantly depleting the DM content of low-mass subhalos and making them more susceptible to tidal disruption. We fit the suppression of the present-day DDM subhalo mass function (SHMF) as a function of τ and V kick using a suite of high-resolution zoom-in simulations of MW-mass halos, and we validate this model on new DDM simulations of systems specifically chosen to resemble the MW. We implement our DDM SHMF predictions in a forward model that incorporates inhomogeneities in the spatial distribution and detectability of MW satellites and uncertainties in the mapping between galaxies and DM halos, the properties of the MW system, and the disruption of subhalos by the MW disk using an empirical model for the galaxy–halo connection. By comparing to the observed MW satellite population, we conservatively exclude DDM models with τ 18 Gyr (29 Gyr) for V kick = 20 kms −1 (40 kms −1 ) at 95% confidence. These constraints are among the most stringent and robust small-scale structure limits on the DM particle lifetime and strongly disfavor DDM models that have been proposed to alleviate the Hubble and S 8 tensions.
Publisher: American Physical Society (APS)
Date: 17-09-2015
Publisher: American Astronomical Society
Date: 16-09-2019
No related grants have been discovered for Louis Strigari.