10 research outputs found
Neutron Interferometry constrains dark energy chameleon fields
We present phase shift measurements for neutron matter waves in vacuum and in
low pressure Helium using a method originally developed for neutron scattering
length measurements in neutron interferometry. We search for phase shifts
associated with a coupling to scalar fields. We set stringent limits for a
scalar chameleon field, a prominent quintessence dark energy candidate. We find
that the coupling constant is less than 1.9 ~for at
95\% confidence level, where is an input parameter of the self--interaction
of the chameleon field inversely proportional to .Comment: 7 pages, 4 figure