Differential Cross Sections forp+p→d+π+from 1 to 3 BeV

Abstract

The differential and total cross sections for the reaction $p+p\to d+{\pi }^{+}$ have been measured in a counter experiment for incident proton kinetic energies of 1.0, 1.3, 1.5, 1.7, 2.0, 2.5, and 2.8 BeV. Values of the differential cross section are given for barycentric deuteron angles $\theta$ for $0\ge cos\theta \ge -0.97\mathrm{}$ in small intervals of $cos\theta$. From 1.3 to 2.0 BeV, as $cos\theta$ varies from -0.5 to -1.0, the differential cross section rises, passes through a pronounced maximum, and then decreases rapidly. This maximum propagates from $cos\theta =-0.8\mathrm{}$ at 1.3 BeV to $cos\theta =-0.94\mathrm{}$ at 2.0 BeV, and evolves into a sharp peak at $cos\theta =-1.0\mathrm{}$ for energies above 2.0 BeV. The total cross section decreases rapidly and monotonically with energy from 450 μb at 1.0 BeV to 30 μb at 2.8 BeV.