Antiproton-proton total elastic cross sections in the T and U regions (0.69−2.43 GeV/ c)

Abstract

Antiproton-proton total elastic cross sections at 21 incident momenta in the range 0.69 to 2.43 GeV/ c have been deduced by combining p̄p elastic differential cross sections over a c.m. angular range −0.95 ⩽ cos θ ∗ ⩽ 0.93 with forward elastic cross sections derived from recent real-part measurements and p̄p total cross sections. Two bumps are observed, at M 1 ⋍ 2.155 and M 2 ⋍ 2.345 GeV/c 2 , having widths of Г 1 ∼ 0.135 and Г 2 ∼ 0.135 GeV/c 2 . Corresponding structures in other p̄p reaction channels are discussed.