Phase Motion in the Scalar Low-Mass pi+pi- Amplitude in D+ -> pi-pi+pi+ Decay

Abstract

Applying the Amplitude Difference method to Fermilab experiment E791 D+ -> pi-pi+pi+ data, we measure the low mass pi+pi- phase motion. Our results suggest a significant phase variation, compatible with the existence of an isoscalar sigma(500) meson, as previously reported using an isobar model fit to the full Dalitz-plot density.

12 pages, 8 figures Accepted for publication at PLB

References in corpus (15)

• Scalar mesons above and below 1 GeV
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Cited by in corpus (4)

• Nature of the f_0(600) from its N_c dependence at two loops in unitarized Chiral Perturbation Theory
• Generalized Heavy-to-Light Form Factors in Light-Cone Sum Rules
• Chiral Dynamics and S-wave Contributions in Semileptonic B decays
• Scalar resonances: scattering and production amplitudes