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

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

1998-03-09

arxiv.org/abs/nucl-th/9803029v1

Physics

Nuclear Physics

Nuclear Theory

REVTeX, graphicx, 12 pages (including 4 figures)

Scientific paper

The total cross section for the $pp \to pp \pi^0$ 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 $\pi^0$ production at threshold. The calculated
cross section reproduces data, both scale and energy dependence, fairly well.

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