Speaker
Description
Fixed target experiments are excellent tools for searching for signals of weak interacting dark matter in the sub-GeV mass region. The concept of dark portals between hidden and ordinary matter, as described by the Standard Model, typically involves light sub-GeV intermediate states. In particular, the dark photon portal will be considered and discussed within the framework of existing and future experiments, such as NA64 and NA62 at the SPS at CERN. Besides, it is instrument a test LFV process if these process is connected with radiation of new particle. In beam dump mode such experiments are also tools for studying visible modes of dark matter. We will discuss the current experimental situation, our theoretical calculation of dark photon production and discuss general model of dark photon limits in the sub-GeV mass region.
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