S-wave Meson-Meson Scattering from Unitarized U(3) Chiral Lagrangians

An investigation of the s-wave channels in meson-meson scattering is performed within a U(3) chiral unitary approach. Our calculations are based on a chiral effective Lagrangian which includes the eta' as an explicit degree of freedom and incorporates important features of the underlying QCD Lagrangian such as the axial U(1) anomaly. We employ a coupled channel Bethe-Salpeter equation to generate poles from composed states of two pseudoscalar mesons. Our results are compared with experimental phase shifts up to 1.5 GeV and effects of the eta' within this scheme are discussed.Comment: 18 pages, 6 figure

THE ANALYTIC STRUCTURE OF THE OFF-MASS-SHELL S-WAVE pipisup+sup +pipisup−sup - SCATTERING AMPLITUDE.

This report talks about The Analytic Structure of the Off-Mass-Shell S-Wave $pi$$sup +$$pi$$sup -$ Scattering Amplitude

Data Handling for the Lepton Detector

The data acquisition and processing needs of a typical lepton-oriented large-solid-angle detector were evaluated, and a configuration of the data readout systems (including microprocessors), control computer(s), and local intersection computer was recommended. Features considered explicitly include triggering and data rates, data readout and monitoring (standard device processor, event processor, and intersection event processor), and off-line computing. 6 figures, 2 tables. (RWR

Experimental low mass s-wave [pi] [pi] phase shifts consistent with the off-mass-shell dependence of current algebra /

"Supported in part by the U.S. Atomic Energy Commission.""High Energy Physics." --from the cover.Includes bibliographical references (pages 8-9).Mode of access: Internet