Pion Absorption on <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>T</mi><mo>=</mo><mn>1</mn><mn></mn></math></span> Nucleon Pairs at <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>T</mi></mrow><mrow><mi>π</mi></mrow></msub></mrow><mo>=</mo><mn>70</mn><mn></mn></math></span> MeV

H. Yokota; K. Nakayama; K. Ichimaru; T. Katsumi; T. Mori; S. Igarashi; K. Hama; R. Chiba; K. Nakai; J. Chiba; H. En'yo; S. Sasaki; T. Nagae; M. Sekimoto

doi:10.1103/PhysRevLett.57.807

Pion Absorption on $T = 1$ Nucleon Pairs at $T_{π} = 70$ MeV

H. Yokota, K. Nakayama, K. Ichimaru, T. Katsumi, T. Mori, S. Igarashi, K. Hama, R. Chiba, K. Nakai, J. Chiba, H. En'yo, S. Sasaki, T. Nagae, and M. Sekimoto

Phys. Rev. Lett. 57, 807 – Published 18 August 1986

Abstract

Angular correlations of the ${}^{6, 7}{Li} (π^{\pm}, p n)$ cross sections were measured in a wide angular range at $T_{π} = 70$ MeV. The components of the two-nucleon absorption processes were extracted, and the angular distributions of the cross sections were obtained. Strong asymmetries about 90° were observed for the reactions ${}^{6, 7}{Li} (π^{\pm}, p n)$ , and the cross sections were much larger than that of ${}^{3}{He}$ . These results show the importance of the $σ_{11}$ component in pion absorption on $T = 1$ nucleon pairs for $p$ -shell nuclei.

Received 25 September 1985

DOI:https://doi.org/10.1103/PhysRevLett.57.807

Authors & Affiliations

H. Yokota, K. Nakayama^*, K. Ichimaru^†, T. Katsumi, T. Mori, S. Igarashi, K. Hama, and R. Chiba

Department of Physics, Tokyo Institute of Technology, Ohokayama, Meguro-ku, Tokyo 152, Japan

K. Nakai^‡, J. Chiba^‡, H. En'yo, S. Sasaki, T. Nagae, and M. Sekimoto

Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan

^*Present address: Toshiba Corporation R&D Centre, 4-1 Ukishima, Kawasaki, Japan.
^†Present address: Texas Instruments, Hiji, Oita, Japan.
^‡Present address: National Laboratory for High-Energy Physics, Ibaraki, Japan.