| Autor: |
A. V. Sarantsev, N. Djaoshvili, B.S. Zou, A. V. Anisovich, D.V. Bugg, C. Hodd, L. Montanet, Jan Kisiel |
| Rok vydání: |
2001 |
| Předmět: |
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| Zdroj: |
Nuclear Physics A. 690:567-594 |
| ISSN: |
0375-9474 |
| DOI: |
10.1016/s0375-9474(01)00349-9 |
| Popis: |
Data on p p→ηπ + π − π + π − at rest show two resonant processes: (a) f 0 (1370)η,f 0 (1370)→σσ and ρρ , (b) η(1440)σ , η(1440)→ηπ + π − . The branching ratio BR[f 0 (1370)→ρρ]/BR[f 0 (1370)→σσ]=0.98±0.25 in the mass range available here. Using data on p p→ηπ 0 π 0 , the ratio Γ 4π /Γ 2π ⩾5 for f 0 (1370) . The effects of the strongly s -dependent width of f 0 (1370) are discussed in some detail. The η(1440) is observed decaying to ησ and a 0 (980)π , with strong destructive interference between them. In its decay to a 0 (980)π , a narrow peak appears in the ηπ mass spectrum, but 30–50 MeV above that usually attributed to a 0 (980) and significantly above the KK threshold. This effect is explained naturally by a two-step process: η(1440)→K ∗ (890)K followed by rescattering of the two kaons through a 0 (980) to ηπ above the KK threshold. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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