<math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>ϕ</mi></math>-Meson Production in the Reactions <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>±</mo></mrow></msup></mrow><mi>N</mi><mo>→</mo><mrow><msup><mrow><mi>K</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow><mrow><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mi>N</mi></math> at 6 GeV/c

D. Cohen; D. S. Ayres; R. Diebold; S. L. Kramer; A. J. Pawlicki; A. B. Wicklund

doi:10.1103/PhysRevLett.38.269

$ϕ$ -Meson Production in the Reactions $π^{\pm} N \to K^{-} K^{+} N$ at 6 GeV/c

D. Cohen, D. S. Ayres, R. Diebold, S. L. Kramer, A. J. Pawlicki, and A. B. Wicklund

Phys. Rev. Lett. 38, 269 – Published 7 February 1977

Abstract

A sample of 1200 $ϕ$ mesons produced in the Zweig-rule-forbidden reactions $π^{\pm} N \to ϕ N$ shows a flat $t$ distribution (slope=1.7 ± 0.2 Ge $V^{- 2}$ ) and a cross section suppressed by 0.0032±0.0004 relative to $π^{-} p \to ω n$ . Natural-parity-exchange $ω$ and $ϕ$ production have similar $t$ dependences, while $ω$ and $ϕ$ production by unnatural-parity exchange differ markedly. Interference between the $ϕ$ and the underlying $\bar{K} K$ $S$ wave indicates substantial nucleon-spin incoherence between the amplitudes for $ϕ$ and $S$ -wave production.