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Benjamin Roberts
Researcher at University of Queensland
Publications - 50
Citations - 1075
Benjamin Roberts is an academic researcher from University of Queensland. The author has contributed to research in topics: Dark matter & Atomic clock. The author has an hindex of 15, co-authored 46 publications receiving 828 citations. Previous affiliations of Benjamin Roberts include University of New South Wales & University of Nevada, Reno.
Papers
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Journal ArticleDOI
Revisiting parity nonconservation in cesium.
TL;DR: The interpretation of the PNC measurements in cesium still indicates reasonable agreement with the standard model (1.5σ); however, the sum-over-states approach gives new constraints on physics beyond it.
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Search for domain wall dark matter with atomic clocks on board global positioning system satellites.
Benjamin Roberts,Geoffrey Blewitt,Conner Dailey,Mac Murphy,Maxim Pospelov,Alex Rollings,Jeff Sherman,Wyatt Williams,Andrei Derevianko +8 more
TL;DR: A stronger constraint is determined on the coupling of this dark matter to atomic clocks on board global positioning satellites through the analysis of 16 years of archival data, which improves the limits on certain quadratic scalar couplings of domain wall dark Matter to standard model particles by several orders of magnitude.
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Dark matter scattering on electrons: Accurate calculations of atomic excitations and implications for the DAMA signal
Benjamin Roberts,V. A. Dzuba,Victor V. Flambaum,Victor V. Flambaum,Maxim Pospelov,Maxim Pospelov,Yevgeny V. Stadnik +6 more
TL;DR: In this paper, a mediator particle with scalar or vector couplings to dark matter and to electrons is introduced to account for the relativistic effects of atomic ionization.
Journal ArticleDOI
Parity and Time-Reversal Violation in Atomic Systems
TL;DR: In this article, the authors review the recent progress in the field of parity and time-reversal violation in atoms, molecules, and nuclei, and examine the implications for physics beyond the Standard Model, with an emphasis on possible areas for development.
Journal ArticleDOI
Search for domain wall dark matter with atomic clocks on board global positioning system satellites
Benjamin Roberts,Geoffrey Blewitt,Conner Dailey,Mac Murphy,Maxim Pospelov,Alex Rollings,Jeff Sherman,Wyatt Williams,Andrei Derevianko +8 more
TL;DR: In this article, the authors used GPS as a ~ 50,000 km aperture dark matter detector to search for topological defects in the form of domain walls, and they found no evidence for DM in the domain walls at their current sensitivity level.