New study of the isotensor pi-pi interaction

Details New study of the isotensor pi-pi interaction New study of the isotensor pi-pi interaction

2003-08-14

arxiv.org/abs/hep-ph/0308152v1

Nucl.Phys.A735:111-124,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 5 figures

Scientific paper

10.1016/j.nuclphysa.2004.01.126

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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