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arXiv · hep-ph/0308152

New study of the isotensor pi-pi interaction

F. Q. Wu·B. S. Zou·L. Li·D. V. Bugg
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Abstract

With t-channel rho, f2(1270) exchange and the pi pi -> rho rho -> pi pi box diagram contribution, we reproduce the pi pi isotensor S-wave and D-wave scattering phase shifts and inelasticities up to 2.2 GeV quite well in a K-matrix formalism. The t-channel rho exchange provides repulsive negative phase shifts while the t-channel f2(1270) gives an attractive force to increase the phase shifts for pi pi scattering above 1 GeV, and the coupled-channel box diagram causes the inelasticities. The implication to the isoscalar pi pi S-wave interaction is discussed.

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F. Q. Wu, B. S. Zou, L. Li, D. V. Bugg. 2003-08-14. New study of the isotensor pi-pi interaction. https://doi.org/10.1016/j.nuclphysa.2004.01.126

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