The NA60 experiment has studied low-mass muon pair production in
proton-nucleus collisions with a system of Be, Cu, In, W, Pb and U targets
using a 400 GeV/c proton beam at the CERN SPS. The mass spectrum is well
described by the superposition of the two-body and Dalitz decays of the light
neutral mesons η, ρ, ω, η′ and ϕ. A new
high-precision measurement of the electromagnetic transition form factors of
the η and ω mesons is presented, complemented with a measurement of
the temperature parameter of the ρ meson in cold nuclear matter. The \pt
spectra for the ω and ϕ mesons are extracted in the full \pt
range accessible, up to \pt = 2 GeV/c. The nuclear dependence of the
production cross sections for the η, ω and ϕ mesons has been
investigated in terms of the power law σpA∝Aα, and the α parameter was studied as a function of
\pt