Abstract
In this paper, we present the design and expected performance of the various detectors of the PADME experiment. The experiment design has been optimized for the detection of the final state photons produced along with a “Dark Photon”, decaying to invisible particles, in the annihilation a of 550 MeV positron with an atomic electron of a thin target. The PADME experiment has been built in a new dedicated experimental hall at the Beam Test Facility (BTF) of the INFN Frascati National Laboratories and has been taking data since the third quarter of 2018.
Highlights
In this paper, we present the design and expected performance of the various detectors of the PADME experiment
Dark Matter (DM) particles may manifest through interactions other that gravity; in this case, it could be produced in Standard Model (SM) interactions
There are long standing experimental programs searching for interactions of cosmic DM with high-mass and low-background experiments and an intense scrutiny of data at high energy accelerators looking for signs of direct production of DM candidates
Summary
From cosmological and astrophysical observations of gravitational effects, something else than ordinary baryonic matter should exist The abundance of this new entity is estimated to be five times larger than Standard Model (SM) particles in terms of mass. U (1)Y + SU (2)Weak + SU (3)Strong + U (1) A0 , and assumes that the corresponding gauge boson has a light mass This new particle (A0 , typically referred to as “Dark Photon”, DP) can act as a portal connecting the hidden sector to the SM particles because of its possible mixing with the SM photon [3,4]. If the coupling of the SM particles to A0 arises only via the kinetic mixing, the coupling is universal and proportional to the electromagnetic charge qem In this case, a single additional parameter e is needed to describe the A0 phenomenology in addition to its mass. University of Roma, INFN Frascati, INFN Lecce and University of Salento, MTA Atomki Debrecen, University of Sofia, Cornell University, US William and Mary College and Iowa University
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