π π- coincidence measurement in the 4He(π , π π-) reaction at Tπ = 280 MeV

D Vetterli; RR Johnson; O Meirav; ME Sevior; V Sossi; P Weber; P Camerini; N Grion; R Rui; FM Rozon; P Amaudruz; D Ottewell; G Sheffer; GR Smith; NR Stevenson; MJ Vicente-Vacas

Journal article

π π- coincidence measurement in the 4He(π , π π-) reaction at Tπ = 280 MeV

D Vetterli, RR Johnson, O Meirav, ME Sevior, V Sossi, P Weber, P Camerini, N Grion, R Rui, FM Rozon, P Amaudruz, D Ottewell, G Sheffer, GR Smith, NR Stevenson, MJ Vicente-Vacas

Nuclear Physics Section A | ELSEVIER SCIENCE BV | Published : 1992

DOI: 10.1016/0375-9474(92)90641-V

Abstract

The pion-induced pion-production reaction (π+, π+π-) on 4He has been studied at an incident pion kinetic energy of 280 MeV. The outgoing pions were detected in coincidence and the measured four-fold differential cross sections are compared with a quasifree πN → ππN microscopic model. Finally, the results are directly compared with recent data from the 16O(π+, π+π-) and2H(π+, π+π-)pp reaction at the same incident energy. © 1992.