Journal
PHYSICAL REVIEW D
Volume 106, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.106.056001
Keywords
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Funding
- China Postdoctoral Science Foundation [2021M701086]
- Natural Science Foundation of Henan [212300410123, 222300420554]
- Project of Youth Backbone Teachers of Colleges and Universities of Henan Province [2020GGJS017]
- Youth Talent Support Project of Henan [2021HYTP002]
- Open Project of Guangxi Key Laboratory of Nuclear Physics and Nuclear Technology [NLK2021-08]
- National Natural Science Foundation of China [11735003, 11975041, 11961141004, 12075288, 11961141012]
- Youth Innovation Promotion Association CAS
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Recently, the Belle Collaboration has measured the lambda(+)(c) -> eta lambda pi(+ )decay and observed clear signals of the resonances A(1670) and E(1385). By reanalyzing the process and considering the S-wave eta A and eta pi+ final state interactions, researchers have obtained results that are consistent with the experimental measurements.
Recently, the Belle Collaboration has measured the lambda(+)(c) -> eta lambda pi(+ )decay and reported the eta A and lambda pi(+ )invariant mass distributions, which show the clear signals of the resonances A(1670) and E(1385), respectively. Based on our previous works [Eur. Phys. J. C 76, 496 (2016) and Phys. Rev. D 95, 074024 (2017)], we reanalyze this process by considering the S -wave eta A and eta pi+ final state interactions within the chiral unitary approach, which dynamically generate the A(1670) and a(0)(980), respectively. Our results are in agreement with the Belle measurements of the eta lambda and pi+lambda invariant mass distributions. In addition, the pi(+)eta invariant mass distribution is also calculated and a cusp structure of a(0)(980) is clearly shown around the K(K) over bar mass threshold.
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