4 papers
An Improved Torsion Balance Test of the Equivalence Principle Towards the Sun
M. P. Ross, E. A. Shaw, C. Gettings +3
We search for violations of the Equivalence Principle towards the Sun using a rotating torsion balance apparatus. We set 95\%-confidence limits on violations with beryllium and alu…
A Search for Ultra-Light Vector Dark Matter with a Rotating Torsion Balance
M. P. Ross, E. A. Shaw, C. Gettings +3
We search for ultra-light vector dark matter interacting with a rotating torsion balance with a baryon minus lepton number composition dipole. Our search spans candidate masses in…
Probing For Non-Gravitational Galactic-Range Dark Matter Interactions
M. P. Ross, S. K. Apple, E. A. Shaw +3
Dark matter remains a mystery in fundamental physics. The only evidence for dark matter's existence is from gravitational interactions. We operated a precision torsion balance expe…
Test of the Equivalence Principle for Superconductors
M. P. Ross, S. M. Fleischer, I. A. Paulson +9
We searched for violations of the weak equivalence principle using a cryogenic torsion balance with a pendulum comprised of superconducting niobium and copper. We constrain the Eöt…