Phys.Rev. C 97, 035208 (2018)

T.Hiraiwa, for the LEPS Collaboration

First measurement of coherent φ-meson photoproduction from ⁴He near threshold

NUCLEAR REACTIONS ⁴He(polarized γ, αφ), E=1.685-2.385 GeV; measured invariant mass spectrum for K⁺K^- pairs from the decay of φ meson, angular distributions for E1 and E2, differential cross section using the LEPS spectrometer at SPring-8 facility in Japan; deduced spin density matrix elements for the E1 and E2 regions.

doi: 10.1103/PhysRevC.97.035208