Pion-pion Scattering above Resonances
نویسنده
چکیده
We model large angle intermediate energy pion-pion scattering by the pQCD two-gluon (2g) exchange contribution and discuss the onset of the dominance of the Glauber-Gribov-Landshoff (GGL) component. The pQCD 2g exchange contribution becomes substantial already at |t| ∼ 1 GeV, but the pQCD exchange dominance is deferred to |t| ∼ 3 GeV because of competing multiple soft rescattering effects. Based on the NN and πN total cross section data and Regge factorization, we evaluate the dominant soft contribution to the ππ total cross section and find the results consistent with the ones deduced earlier from the absorption model analysis of the πN → XN,X∆ data.
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