Investigation of a (K π) mass enhancement near 1870 MeV in the reaction K -p → K -π+n at 10 and 16 GeV/ c
Abstract
An enhancement in the (K -π+) mass distribution at 1871 ± 10 MeV with full width of 285 ± 40 MeV is observed in the charge-exchange reaction K -p → K -π+n at 10 and 16 GeV/ c. The energy dependence of its cross section, the shape of the differential cross section d σ/d t and the decay angular distributions are consistent with a production mechanism by pion exchange. No significant enhancement at the same mass is seen in the non-charge exchange reaction K -p → (K π) -p. The experimental evidence is reviewed and it is suggested that there may be more than one K ∗ enhancement in the 1700-1900 mass region.
- Publication:
-
Nuclear Physics B
- Pub Date:
- July 1977
- DOI:
- 10.1016/0550-3213(77)90401-1
- Bibcode:
- 1977NuPhB.125..189G