Title
| Observation of narrow (3ππ)±± peaks in the δδ and A_1_1 regions in ¯pp¯¯¯pp annihilations at 5.7 GeV/c |
Author(s)
|
Atherton, Henry W ; Franek, B J ; French, Bernard R ; Ghidini, B ; Hilpert, H G ; Kinson, J B ; Mandelli, L ; Moebes, J P ; Myklebost, K ; Nellen, B ; Quercigh, Emanuele ; Simák, V Zeige alle 12 Autoren |
Affiliation
| (CERN) |
Publication
| 1973 |
In:
| Phys. Lett. B 43 (1973) 249-52 |
DOI
| 10.1016/0370-2693(73)90281-5
|
Subject category
| Particle Physics - Phenomenology |
Abstract
| In the pi /sup +/ pi /sup -/ pi /sup +or-/ systems of the reactions pp to KKm pi (m=4,5) two narrow peaks are observed at the positions of the delta and A/sub 1/ mesons. The measured masses and widths are: M= (956+or-7)MeV, Gamma =(46+or-22)MeV for the delta and M=(1076+or-5)Me V, Gamma =(36/sup +20//sub -15/)MeV, for the A/sub 1/. Their decay modes and spin-parities are shown to be mainly 3 pi , J/sup P/=0/sup - / and rho pi , J/sup P/=1/sup +/(D-wave) respectively. (8 refs). |