pi-N charge exchange and pi(+)-pi(0) scattering at low energies

Details pi-N charge exchange and pi(+)-pi(0) scattering at low energies pi-N charge exchange and pi(+)-pi(0) scattering at low energies

1997-06-30

arxiv.org/abs/hep-ph/9706553v1

Nucl.Phys. A629 (1998) 201c-204c

Physics

High Energy Physics

High Energy Physics - Phenomenology

Talk given by D. Pocanic at QULEN97, Osaka, 20-23 May 1997; 4 pages, 2 PostScript figures, writen in LaTeX 2e, uses packages "

Scientific paper

pi-N and pi-pi interactions near threshold are uniquely sensitive to the chiral symmetry breaking part of the strong interaction. The pi-N sigma-term value with its implications for nucleon quark structure and the recent controversy concerning the size of the scalar quark condensate have renewed the experimental interest in these two fundamental systems. We report new differential cross sections for the reaction $pi^-p \to \pi^0n$ at 27.5 MeV pion incident kinetic energy, measured between $\theta_{CM} = 0^\circ$ and $55^\circ$. Our results are in excellent agreement with the existing comprehensive pi-N phase shift analysis. We also report on a Chew-Low analysis of exclusive $\pi^+ p \to \pi^+\pi^0p$ data at 260 MeV pion incident energy.

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