N* resonances from K $\Lambda$ Λ amplitudes in sliced bins in energy

Anisovich, A. V.; Burkert, V.; Hadžimehmedović, M.; Ireland, D. G.; Klempt, E.; Nikonov, V. A.; Omerović, R.; Sarantsev, A. V.; Stahov, J.; Švarc, A.; Thoma, U.

doi:10.1140/epja/i2017-12443-x

Title: N* resonances from K $$\Lambda$$ Λ amplitudes in sliced bins in energy

Journal Article · Fri Dec 22 04:00:00 UTC 2017 · European Physical Journal. A

DOI: https://doi.org/10.1140/epja/i2017-12443-x · OSTI ID:1417972

Anisovich, A. V. ^[1]; Burkert, V. ^[2]; Hadžimehmedović, M. ^[3]; Ireland, D. G. ^[4]; Klempt, E. ^[5]; Nikonov, V. A. ^[1]; Omerović, R. ^[3]; Sarantsev, A. V. ^[1]; Stahov, J. ^[3]; Švarc, A. ^[6]; Thoma, U. ^[7]

Univ. of Bonn (Germany); Particle and Nuclear Physics Inst., Gatchina (Russia)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Univ. of Tuzla (Bosnia and Herzegovina)
Univ. of Glasgow, Scotland (United Kingdom)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of Bonn (Germany)
Rudjer Boskovic Inst., Zagreb (Croatia)
Univ. of Bonn (Germany)

The two reactions $$\gamma p\to K^+\Lambda$$ and $$\pi^-p\to K^0\Lambda$$ are analyzed to determine the leading photoproduction multipoles and the pion-induced partial wave amplitudes in slices of the invariant mass. The multipoles and the partial-wave amplitudes are simultaneously fitted in a multichannel Laurent+Pietarinen model (L+P model), which determines the poles in the complex energy plane on the second Riemann sheet close to the physical axes. The results from the L+P fit are compared with the results of an energy-dependent fit based on the Bonn-Gatchina (BnGa) approach. The study confirms the existence of several poles due to nucleon resonances in the region at about 1.9\,GeV with quantum numbers $J^P = 1/2^+$, $3/2^+, 1/2^-, 3/2^-, 5/2^-$.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 1417972

Report Number(s):: JLAB--PHY-17-2568; DOE/OR--/23177-4329; arXiv:1712.07537; PII: 12443

Journal Information:: European Physical Journal. A, Journal Name: European Physical Journal. A Journal Issue: 12 Vol. 53; ISSN 1434-6001

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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