Abstract
The nature of Λ (1405) hyperon is yet unresolved for distinction among three-quark state, meson-baryon molecular state, or any other new form of hadronic matter. Recent theoretical works predict its lineshape to be different in terms of the πΣ isospin channels in the context of chiral dynamics. We have measured the lineshape of Λ (1405) in charged πΣ channels through p (γ, K+ π) Σ reaction at 1.5-2.4 GeV. The observed lineshapes are different in terms of π- Σ+ and π+ Σ- channels, and depends largely on the angular coverage for pions from the Λ (1405) decay. The cross section for Λ (1405) photoproduction integrated over the angular region 0.8 < cos θK+* < 1.0 was found to be 0.43μb in the energy range from 1.5 to 2.0 GeV and 0.072μb in the energy range from 2.0 to 2.4 GeV.
| Original language | English |
|---|---|
| Pages (from-to) | 329-332 |
| Number of pages | 4 |
| Journal | Nuclear Physics A |
| Volume | 835 |
| Issue number | 1-4 |
| DOIs | |
| Publication status | Published - 2010 Apr 1 |
| Externally published | Yes |
Fingerprint
Keywords
- Λ (1405)
- hyperons
- photoproduction
- SPring-8
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
The Nature of the Λ(1405) from Photoproduction at SPring-8/LEPS. / Ahn, Jung Keun.
In: Nuclear Physics A, Vol. 835, No. 1-4, 01.04.2010, p. 329-332.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The Nature of the Λ(1405) from Photoproduction at SPring-8/LEPS
AU - Ahn, Jung Keun
PY - 2010/4/1
Y1 - 2010/4/1
N2 - The nature of Λ (1405) hyperon is yet unresolved for distinction among three-quark state, meson-baryon molecular state, or any other new form of hadronic matter. Recent theoretical works predict its lineshape to be different in terms of the πΣ isospin channels in the context of chiral dynamics. We have measured the lineshape of Λ (1405) in charged πΣ channels through p (γ, K+ π) Σ reaction at 1.5-2.4 GeV. The observed lineshapes are different in terms of π- Σ+ and π+ Σ- channels, and depends largely on the angular coverage for pions from the Λ (1405) decay. The cross section for Λ (1405) photoproduction integrated over the angular region 0.8 < cos θK+* < 1.0 was found to be 0.43μb in the energy range from 1.5 to 2.0 GeV and 0.072μb in the energy range from 2.0 to 2.4 GeV.
AB - The nature of Λ (1405) hyperon is yet unresolved for distinction among three-quark state, meson-baryon molecular state, or any other new form of hadronic matter. Recent theoretical works predict its lineshape to be different in terms of the πΣ isospin channels in the context of chiral dynamics. We have measured the lineshape of Λ (1405) in charged πΣ channels through p (γ, K+ π) Σ reaction at 1.5-2.4 GeV. The observed lineshapes are different in terms of π- Σ+ and π+ Σ- channels, and depends largely on the angular coverage for pions from the Λ (1405) decay. The cross section for Λ (1405) photoproduction integrated over the angular region 0.8 < cos θK+* < 1.0 was found to be 0.43μb in the energy range from 1.5 to 2.0 GeV and 0.072μb in the energy range from 2.0 to 2.4 GeV.
KW - Λ (1405)
KW - hyperons
KW - photoproduction
KW - SPring-8
UR - http://www.scopus.com/inward/record.url?scp=77649302107&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77649302107&partnerID=8YFLogxK
U2 - 10.1016/j.nuclphysa.2010.01.211
DO - 10.1016/j.nuclphysa.2010.01.211
M3 - Article
AN - SCOPUS:77649302107
VL - 835
SP - 329
EP - 332
JO - Nuclear Physics A
JF - Nuclear Physics A
SN - 0375-9474
IS - 1-4
ER -