Excited baryon could decay into photon and ground state baryon,but could it decay into omega meson and ground state baryon?Could you introduce me some articles about it,experimental or theoretical?
There are excited baryons that can undergo several decays....
If the conservation laws are satisfied then the decay can exist...
Take for example the [itex]\Delta^+[/itex] baryon which is an excited proton, and it decays to proton via:
[itex] \Delta^+ \rightarrow p + \pi^0 [/itex]
So I don't see why there can't be an omega-meson participating in such processes. The only problem of omega, in comparison to pions, is its large mass...
The N(1875), provided that it is real, has a 20% branching fraction to omega + N.
Then I'd say omega meson is not a favorite decay mode, due to its large mass (small phase space relative to others).
Or are you refering to the Delta+ decay I wrote? Then it's 1 of the 2 most common decays of the Delta+ baryon , and the one that results in a proton [un-excited state] product...
There are multiple mesons called ##\omega##. I guess we are talking about the lightest one at 782 MeV.
You can look through the decay modes of http://pdg8.lbl.gov/rpp2014v1/pdgLive/Viewer.action [Broken]. You'll see that a large variety of baryons has reasonable branching ratios with an omega meson. Most of those particles are so short-living that their widths overlap, and you cannot clearly identify the origin of each omega meson individually.
##\Lambda_c^+## has a 1.2% chance to decay to ##\Lambda \pi^+ \omega##. While this might be a rare production mode, the long lifetime of the mother particle can be interesting.
What do you want to do/know?
The mechanism is weak interaction? Maybe, to research the hadron decay ,one always has to treate weak interaction,perhaps it implies the connection between Strong and Weak interaction.
If you expect us to have a discussion on this, it would be helpful to know who this "somebody" is, and where it was published.
I'd not post a copyrighted paper in a publicly available forum. I'm not sure, whether the APS is strict about this, but it can get expensive. In HEP that's not necessary anyway, because usually everything is also posted to arXiv, and that's the case also here: