|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'585
Articles rated: 2609
24 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Some properties of the newly observed X(1835) state at BES | | Xiao-Gang He
; Xue-Qian Li
; Xiang Liu
; J.P. Ma
; | | Date: |
14 Sep 2005 | | Subject: | hep-ph | | Abstract: | Recently the BES collaboration has announced observation of a resonant state in the $pi^+pi^- eta’$ spectrum in $J/psi o gamma pi^+pi^-eta’$ decay. Fitting the data with a $0^{-+}$ state, the mass is determined to be 1833.7 MeV with $7.7sigma$ statistic significance. This state is consistent with the one extracted from previously reported $p ar p$ threshold enhancement data in $J/psi o gamma p ar p$. We study the properties of this state using QCD anomaly and QCD sum rules assuming X(1835) is a pseudoscalar . We find that this state has a sizeable matrix element $<0|G ilde G|G_p>$ leading to branching ratios of $(2.61sim 7.37) imes 10^{-3}$ and $(2.21sim 10.61) imes 10^{-2}$ for $J/psi o gamma G_p$ and for $G_p o pi^+pi^- eta’$, respectively. We also determine the coupling for $G_p- p-ar p$ interaction. Assuming further that the resonance is an SU(3) singlet, we finally study branching ratios of other decay modes. We find that $J/psi o gamma G_p o gamma (pi^+pi^- eta, K K pi^0)$ can provide useful tests for the mechanism proposed. | | Source: | arXiv, hep-ph/0509140 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
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 Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER