Speaker
Ms
Lena Heijkenskjöld
(Uppsala University)
Description
Studies of the decay reactions omega -> pi+ pi- pi0 and omega -> pi+ pi- will be presented. The data used for this study was collected by the WASA-at-COSY collaboration where the omega mesons were produced through the reaction p + d -> 3He + omega. These studies are part of an ongoing PhD project in the nuclear physics group at Uppsala university.
The decay mechanism for the omega -> pi+ pi- pi0 channel can be studied in detail through the doubly differential decay width distribution, also called a Dalitz plot. Previous measurements of such a plot are of limited statistics. A high-statistics Dalitz plot would allow for convincing tests of theoretical predictions of the decay mechanism and final state interactions.
The isospin breaking omega -> pi+ pi- decay can give insight into the behaviour of the rho-omega mixing. This channel has already been widely studied in e+e- collisions where the interference has been conclusively shown as destructive. Only a few measurements with limited statistics have been performed for hadronic production of the omega meson with hints of a possible constructive interference. The aim of this study is to investigate the structure of the omega -> pi+ pi- signal in proton on deuteron collisions.
Primary author
Ms
Lena Heijkenskjöld
(Uppsala University)
