  The "Physics Beyond Colliders (PBC)" study explores fundamental physics
opportunities at the CERN accelerator complex complementary to collider
experiments. Three new collaborations aim to exploit the M2 beamline in the
North Area with existing high-intensity muon and hadron beams, but also aspire
to go beyond the current M2 capabilities with a RF-separated, high intensity
hadron beam, under study. The AMBER/COMPASS++ collaboration proposes an
ambitious program with a measurement of the proton radius with muon beams, as
well as QCD-related studies from pion PDFs / Drell-Yan to cross section
measurements for dark sector searches. Assuming feasibility of the RF-separated
beam, the spectrum of strange mesons would enter a high precision era while
kaon PDFs as well as nucleon TMDs would be accessible via Drell-Yan reactions.
The NA64mu collaboration proposes to search for dark sector mediators such as a
dark scalar A' or a hypothetical Z_mu using the M2 muon beam and complementing
their on-going A' searches with electron beams. The MuonE collaboration intends
to assess the hadronic component of the vacuum polarization via elastic mu-e
scattering, the dominant uncertainty in the determination of (g-2)_mu. An
overview of the three new experimental programs will be presented together with
implications for the M2 beamline and the experimental area EHN2, based on the
studies of the PBC "Conventional Beams" Working Group.
