[Jef] [EXTERNAL] abstract to APS april meeting

[Shepherd, Matthew]

Hi Liping,

You write:

"The QCD symmetries at low energies are manifested in the most unambiguous form in  η and η'. Thus, the precision measurement of their properties will yield light on our understanding of the symmetry structure, as well as the origin and dynamics of the confinement QCD."

What symmetry structure are you referring to?  Also, what precision properties of the eta and eta' will be measured with JEF and how will they tell us about the origin and dynamics of confinement in QCD?

Finally, why is it relevant that the eta and eta' have "quantum numbers of the vacuum (except parity)" ?  What about mesons that really have quantum numbers of the vacuum?  Or mesons like the f1 that have quantum numbers of the vacuum except spin?  Are they more or less useful than the eta and eta'?  Seems like forbidden strong decays is the key thing rather than quantum numbers?

Cheers,

Matt




> On Jan 5, 2024, at 10:16 AM, Gan, Liping via Jef <jef at jlab.org> wrote:
> 
> Dear colleagues,
> 
> I will submit an abstract on the JEF physics (https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=6308) later today to APS April meeting. I would appreciate very much if you could send me your comments as soon as possible. Thanks!
> 
> Best,
> Liping
> 
> _______________________________________________
> Jef mailing list
> Jef at jlab.org
> https://mailman.jlab.org/mailman/listinfo/jef