Ponente
Prof.
David Hitlin
(Caltech)
Descripción
A new class of dark matter theories introducing a dark sector charged under a new force has recently been proposed.
The corresponding gauge boson, the so-called dark photon (A′), has MeV−GeV mass and couples to the Standard Model through its kinetic mixing with the photon.
We present a search for a dark photon in e+e− -> gamma A′, A′ -> e+e−, μ+μ− at BABAR. We do not observe a significant signal and we set 90% confidence level upper limits on the Standard Model-dark sector mixing strength at the level of 10^−4 − 10^−3 in the mass range 0.02 − 10.2GeV.
Autor primario
fabio anulli
(INFN Rome)
