[Halld-physics] [EXTERNAL] new exotic state from BESIII

[Curtis A. Meyer]

Hi Everyone

That is indeed an interesting paper. There is also a theoretical follow up today suggesting it is a K1 K molecule. It is hard to know a lot, but if it is one of the I=0 1-+ hybrid states, 
it could be the s-sbar like state which would likely be a few hundred MeV more massive than the pi(1600) as well as narrower than the other states in that nonet. 

Curtis


Curtis A. Meyer | MCS Associate Dean for Research 
The Otto Stern Professor of Physics 
cmeyer at cmu.edu <mailto:cmeyer at cmu.edu> | 412 260 6290

Carnegie Mellon University 
Department of Physics, Wean Hall 8410 
5000 Forbes Ave., Pittsburgh PA, 15213 
https://urldefense.proofpoint.com/v2/url?u=http-3A__www.curtismeyer.com&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=p3b5acpwYNkmZ3alLqoe1DpcHi6vq5JvK_7ohJe1WqI&m=ignBV95QrsRMFnxyXkGwBAzM7ANDpHB_KwWcOAVlIOjiSfRsKS7j1VnggGg5382Q&s=kQbfZEqyNxqBtEF5idVHB3Rj8ugGjSpeBMJJsjpEp4U&e=  <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.curtismeyer.com_&d=DwIFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=p3b5acpwYNkmZ3alLqoe1DpcHi6vq5JvK_7ohJe1WqI&m=ignBV95QrsRMFnxyXkGwBAzM7ANDpHB_KwWcOAVlIOjiSfRsKS7j1VnggGg5382Q&s=Ud_4FDWoLJYsWeZr2nChBpq4vVKnbxqKwPxFGcHtxZI&e= >







> On Feb 2, 2022, at 19:30, Shepherd, Matthew <mashephe at indiana.edu> wrote:
> 
> 
> Hi all,
> 
> Tonight on the arXiv is an interesting new result of relevance to GlueX:
> 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_2202.00621&d=DwIGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=p3b5acpwYNkmZ3alLqoe1DpcHi6vq5JvK_7ohJe1WqI&m=awYX0H9pabs1osN2z2e0FgFI3DSzDaCgyxGqwzQO1k4wp3Pyr1xL8b9VCHgRCWBq&s=NcE_wnz8qmlCU-GNnBK5MYsaKiG_ErOxVLxrpKiYRkg&e= 
> 
> "Observation of an isoscalar resonance with exotic JPC=1−+ quantum numbers in J/ψ→γηη′"
> 
> submitted to PRL, and the companion long article for PRD:
> 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__arxiv.org_abs_2202.00623&d=DwIGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=p3b5acpwYNkmZ3alLqoe1DpcHi6vq5JvK_7ohJe1WqI&m=awYX0H9pabs1osN2z2e0FgFI3DSzDaCgyxGqwzQO1k4wp3Pyr1xL8b9VCHgRCWBq&s=s58I4cXPOd8g7m4v_KVFzIpyiQwImEoW2u8cOBPa3-M&e= 
> 
> It is interesting that the state is relatively narrow (~200 MeV).
> 
> Happy Chinese New Year!
> 
> Matt
> 
> 
> 
> _______________________________________________
> Halld-physics mailing list
> Halld-physics at jlab.org
> https://mailman.jlab.org/mailman/listinfo/halld-physics

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/halld-physics/attachments/20220203/c150f0de/attachment.html>