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Neutron Lifetime Discrepancy as a Sign of a Dark Sector?
We summarize our recent proposal of explaining the discrepancy between the
bottle and beam measurements of the neutron lifetime through the existence of a
dark sector, which the neutron can decay to with a branching fraction 1%. We
show that viable particle physics models for such neutron dark decays can be
constructed and we briefly comment on recent developments in this area.Comment: Talk presented at CIPANP2018. 8 pages, 2 figures; based on: Phys.
Rev. Lett. 120, 191801 (2018) [arXiv:1801.01124]; v2: references adde
The PADME experiment at LNF
Massive photon-like particles are predicted in many extensions of the
Standard Model. They have interactions similar to the photon, are vector
bosons, and can be produced together with photons. The PADME experiment
proposes a search for the dark photon () in the
process in a positron-on-target experiment, exploiting the positron beam of the
DANE linac at the Laboratori Nazionali di Frascati, INFN. In one year of
running a sensitivity in the relative interaction strength down to is
achievable, in the mass region from 2.5 MeV 22.5 MeV. The proposed
experimental setup and the analysis technique is discussed.Comment: to be published in the DHF2014 proceedings EPJ Web of Conference
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