Negative pion production by 800 MeV/A C, Ne, and Ar beams
1979
Abstract Energy and angular distributions of π's produced in relativistic heavy-ion collisions have been measured at 800 MeV/A incident energy. Cross sections for low-energy pions ( E cm ≈ 100–200 MeV) are forward and backward peaked in the nucleon-nucleon c.m. frame. Such anisotropy becomes weaker for higher energy pions. The shape of the energy spectra at θ cm = 90° is approximately exponential. Their slopes are steeper than those observed for protons. The data are discussed in terms of several models.
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