$χ$PT Calculations with two-pion Loops for S-wave $π^0$ Production in pp Collision

Gedalin, E.; Moalem, A.; Razdolskaya, L.

$χ$PT Calculations with two-pion Loops for S-wave $π^0$ Production in pp Collision

Authors

Gedalin, E.

Moalem, A.

Razdolskaya, L.

Description

The total cross section for the $pp \to pp π^0$ reaction at energies close to threshold is calculated within the frame of a chiral perturbation theory, taking into account tree and one loop diagrams up to chiral order D=2. Two-pion loop contributions dominate $π^0$ production at threshold. The calculated cross section reproduces data, both scale and energy dependence, fairly well.
REVTeX, graphicx, 12 pages (including 4 figures)