Doubly Coherent Production of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span> by <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">He</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>3</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> Ions of 910 MeV

E. Aslanides; P. Fassnacht; F. Hibou; E. Chiavassa; G. Dellacasa; M. Gallio; A. Musso; T. Bressani; G. Puddu

doi:10.1103/PhysRevLett.43.1466

Doubly Coherent Production of $π^{-}$ by ${}^{3}{He}$ Ions of 910 MeV

E. Aslanides, P. Fassnacht, F. Hibou, E. Chiavassa, G. Dellacasa, M. Gallio, A. Musso, T. Bressani, and G. Puddu

Phys. Rev. Lett. 43, 1466 – Published 12 November 1979; Erratum Phys. Rev. Lett. 45, 1738 (1980)

Abstract

The inclusive pion spectrum from the reaction ${}^{3}{He}$ + ${}^{6}{Li}$ → $π^{-} + X$ at 910 MeV was measured at 0° with moderate resolution up to the kinematic limit of the two-body final-state reaction. A first analysis shows that the production of high-energy pions cannot be explained by the $NN \to NN π$ process using conventional nucleon momentum distributions. At the end of the spectrum a clear deviation from the general falloff slope is observed and attributed to the doubly coherent reaction ${}^{3}{He}$ + ${}^{6}{Li}$ → ${}^{9}C$ + $π^{-}$ .