Confirmation of sigma(450--600)-Meson in Upsilon' to Upsilon pipi and Other pipi-Production Processes

Details Confirmation of sigma(450--600)-Meson in Upsilon' to Upsilon pipi and Other pipi-Production Processes Confirmation of sigma(450--600)-Meson in Upsilon' to Upsilon pipi and Other pipi-Production Processes

2001-10-27

arxiv.org/abs/hep-ph/0110358v1

AIP Conf.Proc. 619 (2002) 735-738

Physics

High Energy Physics

High Energy Physics - Phenomenology

proc. of "Hadron '01," Protvino, Russia, Aug, 2001. 5 pages, uses ptptex.sty

Scientific paper

10.1063/1.1482529

Applying the effective amplitude, which is evidently consistent with general constraints from chiral symmetry, the pipi spectra in the relevant processes are analyzed, leading to a strong evidence for existence of the light sigma meson. It is also pointed out that the pipi scattering process, which had been one of the main sources for PDG table for these many years, is, in principle, exceptionally difficult to investigate the property of sigma-meson.

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