skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Explore Research Products in the PAR
It may take a few hours for recently added research products to appear in PAR search results.


  • Home
  • Search Results
  • Page 1 of 2

Search for: All records

Creators/Authors contains: "Watkins, S L"

Note: When clicking on a Digital Object Identifier (DOI) number, you will be taken to an external site maintained by the publisher. Some full text articles may not yet be available without a charge during the embargo (administrative interval).
What is a DOI Number?

Some links on this page may take you to non-federal websites. Their policies may differ from this site.

  1. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Letters)
    We present results of a search for spin-independent dark matter-nucleus interactions in a 1     cm 2 by 1 mm thick (0.233 g) high-resolution silicon athermal phonon detector operated above ground. For interactions in the substrate, this detector achieves an rms baseline energy resolution of 361.5 ( 4 )     m eV (statistical error), the best for any athermal phonon detector to date. With an exposure of 0.233     g × 12 hours, we place the most stringent constraints on dark matter masses between 44 and 87     M eV / c 2 , with the lowest unexplored cross section of 4 × 10 − 32     c m 2 at 87     M eV / c 2 . We employ a conservative salting technique to reach the lowest dark matter mass ever probed via direct detection experiment. This constraint is enabled by two-channel rejection of low energy backgrounds that are coupled to individual sensors. 
    more » « less
    Free, publicly-accessible full text available October 1, 2026
  2. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Letters)
    76Ge can ββ decay into three possible excited states of 76Se, with the emission of two or, if the neutrino is Majorana, zero neutrinos. None of these six transitions have yet been observed. The Majorana Demonstrator was designed to study ββ decay of 76Ge using a low background array of high purity germanium detectors. With 98.2 kg-y of isotopic exposure, the Demonstrator sets the strongest half-life limits to date for all six transition modes. For 2νββ to the 0+ state of 76Se, this search has begun to probe for the first time half-life values predicted using modern many-body nuclear theory techniques, setting a limit of T_1/2 > 1.5e24 y (90% CL). 
    more » « less
    Free, publicly-accessible full text available June 17, 2026
  3. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
    This article presents constraints on dark-matter-electron interactions obtained from the first underground data-taking campaign with multiple SuperCDMS HVeV detectors operated in the same housing. An exposure of 7.63     g − days is used to set upper limits on the dark-matter-electron scattering cross section for dark matter masses between 0.5 and 1000     MeV / c 2 , as well as upper limits on dark photon kinetic mixing and axionlike particle axioelectric coupling for masses between 1.2 and 23.3     eV / c 2 . Compared to an earlier HVeV search, sensitivity was improved as a result of an increased overburden of 225 meters of water equivalent, an anticoincidence event selection, and better pile-up rejection. In the case of dark-matter-electron scattering via a heavy mediator, an improvement by up to a factor of 25 in cross section sensitivity was achieved. Published by the American Physical Society2025 
    more » « less
    Free, publicly-accessible full text available January 1, 2026
  4. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Letters)
    Full Text Available 
  5. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
    Full Text Available 
  6. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Letters)
  7. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
    Full Text Available 
  8. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
    Full Text Available 
  9. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review D)
    Full Text Available 
  10. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Letters)
    Full Text Available