The discussion revolves around the concept of oniums, particularly focusing on their existence as particles that possess their own antiparticles. Participants are exploring the implications of this property and questioning how oniums can exist without immediate annihilation.
The discussion is active, with participants sharing insights about the short lifetimes of oniums and raising further questions about their assembly and existence. There is a recognition of the brief nature of these particles, yet uncertainty remains regarding their formation and the terminology used to describe them.
Participants are operating under the assumption that oniums are inherently unstable due to their particle-antiparticle nature, leading to discussions about their lifetimes and the conditions under which they might be observed.
I've not been able to find any evidence for stable onium. But since it's an particle withit's own anti-particle it shouldn't be able to exist at all.gneill said:What does your research on the topic suggest? Have you found evidence of a stable onium?
I understand that have very short lifetimes. But how are they able to assemble at all? Or is -onium just an expression for the state just before a particle and it's antiparticle annihilate each other?gneill said:I think you'll find that all -oniums have very short half lives. The charged pions in particular have a mean lifetime of about 26 nanoseconds, while the neutral pion's (##\pi^0##) is really short at about 8 x 10-17 seconds.
So you might think of them as particles that are assembled and then live very briefly.
Well, where/how are -oniums found? Maybe do a bit of research on their discoveries?Mathilda said:I understand that have very short lifetimes. But how are they able to assemble at all? Or is -onium just an expression for the state just before a particle and it's antiparticle annihilate each other?