Speaker
Mr
Carl-Oscar Gullstroem
(Uppsala University)
Description
Decays of the π0 allows to search mediates gauge bosons of dark forces in the MeV range. The decay π 0 → e+ e−γ is sensitive to a "dark photon" that decays into an e+ e− pair. WASA-at-COSY has collected a 500k data sample to constrains the parameters of this hypothetical gauge boson. The rare decay π 0 → e+ e− might also probe physics beyond the standard model. The 3σ deviation between experiment and SM prediction might be explained by a dark gauge boson, which might also account for the enhanced e+ e− annihilation line
from the galactic center. A high statistics run with WASA-at-COSY could confirm the present experimental result.
Primary author
Mr
Carl-Oscar Gullstroem
(Uppsala University)
