Study of the reaction $π^{-} p \to n K_{S}^{0} K_{S}^{0}$ at 6.0 and 7.0 GeV/c

1 March 1979

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 19 (5) , 1317-1335
https://doi.org/10.1103/physrevd.19.1317

Abstract

The

K_{S}^{0} K_{S}^{0}

system produced in the reaction

π^{-} p \to n K_{S}^{0} K_{S}^{0}

at 6.0 and 7 0 GeV/c has been studied utilizing the ANL 1.5-m streamer-chamber facility. A 400 000-photograph exposure yielded 5096 unweighted

n K_{S}^{0} K_{S}^{0}

events. The cross section for this reaction was determined to be 9.6 ± 1.3 μb at 6.0 GeV/c and 8.7 ± 1.1 μb at 7.0 GeV/c. The decay angular distributions were parametrized in terms of moments of the spherical harmonics. The

〈 Y_{4}^{0} 〉

moment was fitted to interfering Breit-Wigner amplitudes for the

f

and

f^{'}

mesons. Using this fit, the branching ratio

R = \frac{Γ (f \to K \bar{K})}{Γ (f \to all)}

was found to be (2.3 ± 0.8)%. An energy-independent production-amplitude analysis revealed an enhancement in the

S

-wave amplitude near 1300 MeV. The properties of the

S

-wave enhancement are discussed and compared with those observed in other recent experiments. Extrapolated cross sections for the reaction

π π \to K_{S}^{0} K_{S}^{0}

are presented. We find a cross section considerably below the

S

-wave unitarity limit in the

S^{*}

region.

Keywords

This publication has 26 references indexed in Scilit:

Measurement of the $π^{+} π^{-} \to {K_{s}}^{0} {K_{s}}^{0}$ Scattering Cross Section
Physical Review Letters, 1978
Observation of a New Scalar Meson
Physical Review Letters, 1976
A new upper limit for the decay rate Γ(f′ → ππ)
Physics Letters B, 1975
Measurement of the cross section for the reactionπ−p→(allneutrals)from 4.0 to 8.0 GeV/c
Physical Review D, 1975
$K_{1}^{0} K_{1}^{0}$ Threshold Enhancement in $π^{-} p \to K_{1}^{0} K_{1}^{0} n$ at 4 and 5 GeV/c
Physical Review Letters, 1968
Strange-Particle Production in $π^{-} p$ Interactions from $1.5 to 4.2 \frac{BeV}{c}$ . I. Three-and-More-Body Final States
Physical Review B, 1967
Observation of resonance in the KO1KO1 system
Physics Letters B, 1967
Observation of an Enhancement in the $I = 0$ ${K_{1}}^{0} {K_{1}}^{0}$ System at 1068 MeV
Physical Review Letters, 1966
Final-State Interactions in the $π^{-} + p \to K + \bar{K} + N$ Reaction
Physical Review Letters, 1962
Experimental Cross Section for $π π \to K \bar{K}$
Physical Review Letters, 1962

Study of the reactionπ−p→nKS0KS0at 6.0 and 7.0 GeV/c

Abstract

Keywords

Study of the reaction $π^{-} p \to n K_{S}^{0} K_{S}^{0}$ at 6.0 and 7.0 GeV/c