Speaker
Bertrand Echenard
(Caltech)
Description
We present results from the BaBar experiment on searches
for low-mass new physics. This includes a search for a light CP-odd Higgs
boson (A0) in Upsilon(1S) -> gamma A0, A0 -> ccbar decays. providing
limits on the product branching fraction B(Upsilon(1S) -> gamma A0)xB(A0 -> ccbar)
at the level of 7x10-5 - 2x10-3 for A0 masses between 4.0 GeV and 9.25 GeV; a
search for a dark photon (A'), a new light gauge boson introduced by dark sector models
obtaining 90% confidence level upper limits on the mixing strength between the photon
and dark photon at the level of 10-3 - 10-4 for dark photon masses in the range 0.02 - 10.2 GeV; and a search for neutral, long-lived particles produced in e+e- collisions or neutral B meson decays obtaining limits on the product of the production cross-section, branching fraction, and reconstruction efficiency are set for each final state.
Author
Bertrand Echenard
(Caltech)
