Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'487'895
Articles rated: 2609

28 March 2024
 
  » arxiv » 2009.07795

 Article overview


Coupled-channel interpretation of the LHCb double-$J/ψ$ spectrum and hints of a new state near $J/ψJ/ψ$ threshold
Xiang-Kun Dong ; Vadim Baru ; Feng-Kun Guo ; Christoph Hanhart ; Alexey Nefediev ;
Date 16 Sep 2020
AbstractRecently, the LHCb Collaboration reported pronounced structures in the invariant mass spectrum of $J/psi$-pairs produced in proton-proton collisions at the Large Hadron Collider. In this Letter, we argue that the data can be very well described within two variants of a unitary coupled-channel approach: (i) with just two channels, $J/psi J/psi$ and $psi(2S)J/psi$, as long as energy-dependent interactions in these channels are allowed, or (ii) with three channels $J/psi J/psi$, $psi(2S)J/psi$ and $psi(3770)J/psi$ with just constant contact interactions. Both formulations hint at the existence of a near-threshold state in the $J/psi J/psi$ system with the quantum numbers $J^{PC}=0^{++}$ or $2^{++}$, which we refer to as $X(6200)$. We suggest experimental tests to check the existence of this state and discuss what additional channels need to be studied experimentally to allow for distinctive tests between the two mechanisms proposed. If the molecular nature of the $X(6200)$, as hinted by the three-channel approach, were confirmed, many other double-quarkonium states should exist driven by the same binding mechanisms.
Source arXiv, 2009.07795
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser claudebot






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica