Another look at ππ scattering in the scalar channel

Keiji Igi, Ken Ichi Hikasa

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)


We set up a general framework to describe ππ scattering below 1 GeV based on chiral low-energy expansion with possible spin-0 and -1 resonances. Partial wave amplitudes are obtained with the N/D method, which satisfy unitarity, analyticity, and approximate crossing symmetry. A comparison with the phase shift data in the J=0 channel favors a scalar resonance near the ρ mass.

Original languageEnglish
Article number034005
Pages (from-to)1-9
Number of pages9
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number3
Publication statusPublished - 1999 Feb 1

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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