I=0, s-wave pi + pi ---> k + anti-k interaction near threshold

Hoang, T.F.

doi:10.1007/BF02824563

I=0, s-wave pi + pi ---> k + anti-k interaction near threshold

T.F. Hoang
(
- Argonne
)

1969

20 pages

Published in:

Nuovo Cim.A 64 (1969) 55-74

DOI:

10.1007/BF02824563

reference search5 citations

Citations per year

Abstract: (Springer)

An analysis of theI=0,S-wave

\pi \pi\to {\rm K}\overline {\rm K}

interaction near threshold has been carried out using a complex effective-range model. The absolute cross-sections of

\pi \pi\to {\rm K}\overline {\rm K}

are extracted from CERN and Argonne experiments on π−+p→K1+K1+n. Least-squares fits to

\sigma _{\pi \pi\to {\rm K}\overline {\rm K} }

yield two solutions of comparable χ2. Solution I leads to a bound state of ∼0.957 GeV with a ππ decay width of ∼ 8 MeV. Solution II gives rise to a virtual state with a complex mass: (0.929−i0.090) GeV. Argand diagrams of both solutions do not exhibit the characteristics of a resonance. The scattering length considered as a special case of the present method has also been re-evaluated: the real and imaginary parts are found to be |a|=(0.72±0.15) andb=(0.085±0.011) fm, respectively. Comparison with Argand diagrams of solutions I and II indicates:a<0. A discussion on other related effects is presented.

pion-pion: interaction
interaction: pion-pion
final state
kaon: antikaon
kaon: pair production
pair production: kaon
pion minus-proton: interaction
interaction: pion minus-proton
2 kaons: neutron
model: effective-range

References(0)

Figures(0)

0 References