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

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

2004-05-12

arxiv.org/abs/hep-ex/0405019v2

Phys.Lett.B633:167-172,2006

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, 8 figures Accepted for publication at PLB

Scientific paper

10.1016/j.physletb.2005.11.066

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.

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