Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

KLOE/KLOE-2 results and perspectives on dark force search

Jul 6, 2018, 5:30 PM
15m
203 (COEX, Seoul)

203

COEX, Seoul

Parallel Beyond the Standard Model Beyond the Standard Model

Speaker

Elena Perez Del Rio (INFN - National Institute for Nuclear Physics)

Description

During the last years several Dark Sector Models have been proposed in order to address striking astrophysical observations which fail standard intepretations.
In the minimal case a new vector particle, the so called dark photon or U-boson, is introduced, with small coupling with Standard Model particles. Also, the existence of a dark Higgs boson h' is postulated, in analogy with the Standard Model, to give mass to the U-boson through the Spontaneous Symmetry Breaking mechanism.

The experiment KLOE, working on the Dafne e+e- collider in Frascati, searched for the existence of the U-boson in a quite complete way, investigating several different processes and final states:

  • in dalitz decays of the Phi meson Phi-> eta U, with U->e+e- and eta-> pi+pi-pi0 and p0p0p0
  • in e+e- -> U gamma events, with U decaying to electron, muon and pion pairs
  • in the dark Higgsstrahlung process, e+e- -> Uh', U-> mu+mu-, h' invisible.

New results in U to muon and U to pion decays, and their combination, will be available at the time of the ICHEP Conference.

Tight limits on the model parameters have been set at 90%CL. Further improvements are expected in terms of sensitivity and discovery potential with the new KLOE-2 detector working on the improved DAFNE e+e- collider.

Primary authors

Dr Enrico Graziani (INFN - Sezione Roma III) Elena Perez Del Rio (INFN - National Institute for Nuclear Physics)

Presentation materials