Pions and neutrinos as probes of the nucleon and nuclear few-body system

A number of studies of few-body nucleon and nuclear systems are being pursued at LAMPF using pions and neutrinos as probes. These include: a high-statistics measurement of the cross section for the reaction π+p → π+πoπ0 to determine the 1 = 2 ππ scattering length; precision measurements of the π-p charge exchange cross section in the region of the A; measurements of the cross section for the (π+p → π+π+ p), from D, 3He as 4He as tests of charge symmetry and reaction mechanisms; measurements of the π+p cross section below the Δ; and studies of vp elastic scattering at low Q2 to determine the quark content of the proton spin. Some of these experiments acquired data last year, while others are presently running. LAMPF, the highest power proton accelerator in the world, is presently in the midst of its 1993 production run