|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'506'133
Articles rated: 2609
26 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Lambda(1405) in a baryon-meson scattering with a bound state embedded in the continuum | | Sachiko Takeuchi
; Kiyotaka Shimizu
; | | Date: |
13 Dec 2008 | | Abstract: | We investigate Lambda(1405) as a resonance in a coupled channel baryon-meson
scattering with a ’bound state embedded in the continuum’(BSEC). This BSEC is
introduced by hand, as a state not originated from simple baryon-meson systems.
We assume it comes from the three-quark state.
There appears a resonance in the Sigma pi scattering below the N Kbar
threshold when the N Kbar channel is taken to be strongly attractive. It occurs
without introducing a BSEC, just like the chiral unitary approach. When a BSEC
is introduced, a resonance also appears with a weaker baryon-meson interaction.
The corresponding peak also has a large width, and the N Kbar scattering length
is reproduced well. The interaction whose channel dependence is the same as the
one originated from the color-magnetic interaction, where no N Kbar attraction
exists, also gives a broad peak like Lambda(1405) with help of a BSEC.
It is found that the BSEC coupling which does not vanish at the zero momentum
transfer give a larger width. In order to reproduce the observed N Kbar
scattering length, introducing a BSEC seems preferable. In our calculation, a
model gives an appropriate value when the BSEC contribution to the resonance is
roughly half of that of the N Kbar in size. | | Source: | arXiv, 0812.2526 | | 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