P-wave resonant state of the HeΣ4 hypernucleus in the He4(K−,π−) reaction
We theoretically investigate a possible existence of a p-wave HeΣ4 resonant state with Jπ=1−, T≃1/2 above the Σ threshold, using a coupled (3N–Λ)+(3N–Σ) model with a spreading potential. We calculate inclusive and Σ–Λ conversion π− spectra in a He4(K−,π−) reaction at 1.5 GeV/c, θlab=4–12° by the Gre...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269314008673 |
| _version_ | 1819176494555987968 |
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| author | Toru Harada Yoshiharu Hirabayashi |
| author_facet | Toru Harada Yoshiharu Hirabayashi |
| author_sort | Toru Harada |
| collection | DOAJ |
| description | We theoretically investigate a possible existence of a p-wave HeΣ4 resonant state with Jπ=1−, T≃1/2 above the Σ threshold, using a coupled (3N–Λ)+(3N–Σ) model with a spreading potential. We calculate inclusive and Σ–Λ conversion π− spectra in a He4(K−,π−) reaction at 1.5 GeV/c, θlab=4–12° by the Green's function method in a distorted-wave impulse approximation. The pole position for the p-wave Σ resonant state in HeΣ4 is determined on the Riemann sheets in the complex E plane. The result shows that a peak of the HeΣ4 resonant state is clearly obtained in the conversion spectra above the Σ threshold, and that the angular distributions of these spectra enable extraction of the contribution of the resonant state from the π− spectra. Effects of the Σ-nucleus potential and the interference between Λ and Σ on the spectra are also discussed. Keywords: Hypernuclei, Resonant state, Sigma-nucleus potential |
| first_indexed | 2024-12-22T21:11:39Z |
| format | Article |
| id | doaj.art-a803b676b1e94ba585d8f61c96e5a85a |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-22T21:11:39Z |
| publishDate | 2015-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-a803b676b1e94ba585d8f61c96e5a85a2022-12-21T18:12:30ZengElsevierPhysics Letters B0370-26932015-01-01740312316P-wave resonant state of the HeΣ4 hypernucleus in the He4(K−,π−) reactionToru Harada0Yoshiharu Hirabayashi1Research Center for Physics and Mathematics, Osaka Electro-Communication University, Neyagawa, Osaka, 572-8530, Japan; Corresponding author.Information Initiative Center, Hokkaido University, Sapporo, 060-0811, JapanWe theoretically investigate a possible existence of a p-wave HeΣ4 resonant state with Jπ=1−, T≃1/2 above the Σ threshold, using a coupled (3N–Λ)+(3N–Σ) model with a spreading potential. We calculate inclusive and Σ–Λ conversion π− spectra in a He4(K−,π−) reaction at 1.5 GeV/c, θlab=4–12° by the Green's function method in a distorted-wave impulse approximation. The pole position for the p-wave Σ resonant state in HeΣ4 is determined on the Riemann sheets in the complex E plane. The result shows that a peak of the HeΣ4 resonant state is clearly obtained in the conversion spectra above the Σ threshold, and that the angular distributions of these spectra enable extraction of the contribution of the resonant state from the π− spectra. Effects of the Σ-nucleus potential and the interference between Λ and Σ on the spectra are also discussed. Keywords: Hypernuclei, Resonant state, Sigma-nucleus potentialhttp://www.sciencedirect.com/science/article/pii/S0370269314008673 |
| spellingShingle | Toru Harada Yoshiharu Hirabayashi P-wave resonant state of the HeΣ4 hypernucleus in the He4(K−,π−) reaction Physics Letters B |
| title | P-wave resonant state of the HeΣ4 hypernucleus in the He4(K−,π−) reaction |
| title_full | P-wave resonant state of the HeΣ4 hypernucleus in the He4(K−,π−) reaction |
| title_fullStr | P-wave resonant state of the HeΣ4 hypernucleus in the He4(K−,π−) reaction |
| title_full_unstemmed | P-wave resonant state of the HeΣ4 hypernucleus in the He4(K−,π−) reaction |
| title_short | P-wave resonant state of the HeΣ4 hypernucleus in the He4(K−,π−) reaction |
| title_sort | p wave resonant state of the heς4 hypernucleus in the he4 k π reaction |
| url | http://www.sciencedirect.com/science/article/pii/S0370269314008673 |
| work_keys_str_mv | AT toruharada pwaveresonantstateofthehes4hypernucleusinthehe4kpreaction AT yoshiharuhirabayashi pwaveresonantstateofthehes4hypernucleusinthehe4kpreaction |