Abstract
Using the CHAOS spectrometer at TRIUMF the total cross sections and outgoing pion momentum distributions for the 4He(π+,π-) reaction were measured for π+ kinetic energies from 70 to 130 MeV. At energies around 100 MeV the total cross sections show an excess by a factor 3 over conventional model calculations which could be ascribed to a contribution from a hypothetical d′ dibaryon.
Original language | English |
---|---|
Pages (from-to) | 37-42 |
Number of pages | 6 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 420 |
Issue number | 1-2 |
DOIs | |
State | Published - 19 Feb 1998 |
Keywords
- He target
- Dibaryon
- Pionic double charge exchange