Speaker
Bertrand Echenard
Description
Recent astrophysical observations have motivated interest in models with
a dark sector with GeV-scale gauge and Higgs bosons. In such
models, dark-sector photons typically mix with the standard-model
photon, enabling their detection in e+e- collisions at BABAR, with very
little background in some of the channels. We present searches for a dark-sector
photon and a dark-sector Higgs boson and set stringent limits on the
parameters of the model. Our limits on the SM-dark sector mixing
parameter are tighter than previous limits by up to two orders of
magnitude, depending on the masses of the dark Higgs and dark boson.
