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Aceti, F; Liang, WH; Oset, E; Wu, JJ; Zou, BS; Aceti, F (reprint author), Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,Dept Fis Teor, Apartado 22085, Valencia 46071, Spain.
Isospin breaking and f(0)(980)-a(0)(980) mixing in the eta(1405) -> pi(0)f(0)(980) reaction
Source PublicationPHYSICAL REVIEW D
Language英语
KeywordChiral Perturbation-theory Partial-wave Analysis Meson-exchange Scalar Mesons Decays f(0)(980) Dynamics
AbstractWe make a theoretical study of the eta(1405) -> pi(0)f(0)(980) and eta(1405) -> pi(0)a(0)(980) reactions with an aim to determine the isospin violation and the mixing of the f(0)(980) and a(0)(980) resonances. We make use of the chiral unitary approach where these two resonances appear as composite states of two mesons, dynamically generated by the meson-meson interaction provided by chiral Lagrangians. We obtain a very narrow shape for the f(0)(980) production in agreement with a BES experiment. As to the amount of isospin violation, or f(0)(980) and a(0)(980) mixing, assuming constant vertices for the primary eta(1405) -> pi K-0 (K) over bar and eta(1405) -> pi(0)pi(0)eta production, we find results which are much smaller than found in the recent experimental BES paper, but consistent with results found in two other related BES experiments. We have tried to understand this anomaly by assuming an I = 1 mixture in the eta(1405) wave function, but this leads to a much bigger width of the f(0)(980) mass distribution than observed experimentally. The problem is solved by using the primary production driven by eta' -> K*(K) over bar followed by K* -> K pi, which induces an extra singularity in the loop functions needed to produce the f(0)(980) and a(0)(980) resonances. Improving upon earlier work along the same lines, and using the chiral unitary approach, we can now predict absolute values for the ratio Gamma(pi(0), pi(+)pi(-))/Gamma(pi(0), pi(0)eta) which are in fair agreement with experiment. We also show that the same results hold if we had the eta(1475) resonance or a mixture of these two states, as seems to be the case in the BES experiment.
2012
ISSN1550-7998
Volume86Issue:11Pages:114007
Subject AreaPhysics
Indexed BySCI
Funding OrganizationDGICYT [FIS2011-28853-C02-01]; Generalitat Valenciana in the program Prometeo [2009/090]; EU [283286]; National Natural Science Foundation of China [11035006, 11261130311, 11165005]; DFG [CRC110]; NSFC; Chinese Academy of Sciences [KJCX2-EW-N01]; Ministry of Science and Technology of China [2009CB825200]; U.S. Department of Energy, Office of Nuclear Physics Division [DE-AC02-06CH11357] ; DGICYT [FIS2011-28853-C02-01]; Generalitat Valenciana in the program Prometeo [2009/090]; EU [283286]; National Natural Science Foundation of China [11035006, 11261130311, 11165005]; DFG [CRC110]; NSFC; Chinese Academy of Sciences [KJCX2-EW-N01]; Ministry of Science and Technology of China [2009CB825200]; U.S. Department of Energy, Office of Nuclear Physics Division [DE-AC02-06CH11357] ; DGICYT [FIS2011-28853-C02-01]; Generalitat Valenciana in the program Prometeo [2009/090]; EU [283286]; National Natural Science Foundation of China [11035006, 11261130311, 11165005]; DFG [CRC110]; NSFC; Chinese Academy of Sciences [KJCX2-EW-N01]; Ministry of Science and Technology of China [2009CB825200]; U.S. Department of Energy, Office of Nuclear Physics Division [DE-AC02-06CH11357] ; DGICYT [FIS2011-28853-C02-01]; Generalitat Valenciana in the program Prometeo [2009/090]; EU [283286]; National Natural Science Foundation of China [11035006, 11261130311, 11165005]; DFG [CRC110]; NSFC; Chinese Academy of Sciences [KJCX2-EW-N01]; Ministry of Science and Technology of China [2009CB825200]; U.S. Department of Energy, Office of Nuclear Physics Division [DE-AC02-06CH11357]
Citation statistics
Cited Times:49[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/14960
Collection理论物理所科研产出_SCI论文
Corresponding AuthorAceti, F (reprint author), Univ Valencia, CSIC, Ctr Mixto, Inst Invest Paterna,Dept Fis Teor, Apartado 22085, Valencia 46071, Spain.
Recommended Citation
GB/T 7714
Aceti, F,Liang, WH,Oset, E,et al. Isospin breaking and f(0)(980)-a(0)(980) mixing in the eta(1405) -> pi(0)f(0)(980) reaction[J]. PHYSICAL REVIEW D,2012,86(11):114007.
APA Aceti, F,Liang, WH,Oset, E,Wu, JJ,Zou, BS,&Aceti, F .(2012).Isospin breaking and f(0)(980)-a(0)(980) mixing in the eta(1405) -> pi(0)f(0)(980) reaction.PHYSICAL REVIEW D,86(11),114007.
MLA Aceti, F,et al."Isospin breaking and f(0)(980)-a(0)(980) mixing in the eta(1405) -> pi(0)f(0)(980) reaction".PHYSICAL REVIEW D 86.11(2012):114007.
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