Strong Evidence for Nucleon Resonances near 1900&nbsp;MeV

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

doi:10.1103/PhysRevLett.119.062004

Strong Evidence for Nucleon Resonances near 1900 MeV

Journal Article · Fri Aug 11 00:00:00 EDT 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.119.062004· OSTI ID:1390049

Anisovich, A. V. ^[1]; Burkert, V. ^[2]; Hadžimehmedović, M. ^[3]; Ireland, D. G. ^[4]; Klempt, E. ^[5]; Nikonov, V. A. ^[1]; Omerović, R. ^[6]; Osmanović, H. ^[6]; Sarantsev, A. V. ^[1]; Stahov, J. ^[6]; Švarc, A. ^[7]; Thoma, U. ^[8]

Univ. of Bonn (Germany). Helmholtz - institut fur Strahlen - und Kernphysik; Petersburg Nuclear Physics Inst., Gatchina (Russia). National Research Centre Kurchatov Inst.
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Univ. of Tuzla (Bosnia). Faculty of Natural Science and Mathematics
Univ. of Glasgow, Scotland (United Kingdom). School of Physics and Astronomy, Scottish Universities Physics Alliance (SUPA)
Univ. of Bonn (Germany). Helmholtz - institut fur Strahlen - und Kernphysik; Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Univ. of Tuzla (Bosnia). Faculty of Natural Science and Mathematics
Rudjer Boskovic Inst., Zagreb (Croatia)
Univ. of Bonn (Germany). Helmholtz - institut fur Strahlen - und Kernphysik

Data on the reaction yp→K⁺A from the CLAS experiments are used to derive the leading multipoles, E₀₊, M_1-, E₁₊, and M₁₊, from the production threshold to 2180 MeV in 24 slices of the invariant mass. The four multipoles are determined without any constraints. The multipoles are fitted using a multichannel L+P model that allows us to search for singularities and to extract the positions of poles on the complex energy plane in an almost model-independent method. The multipoles are also used as additional constraints in an energy-dependent analysis of a large body of pion and photoinduced reactions within the Bonn-Gatchina partial wave analysis. The study confirms the existence of poles due to nucleon resonances with spin parity J^P=1/2^-, 1/2⁺, and 3/2⁺ in the region at about 1.9 GeV.

View Accepted Manuscript (DOE)

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

Sponsoring Organization:: USDOE; Russian Science Foundation; German Research Foundation (DFG); National Science Foundation (NSF); UK Science and Technology Facilities Council

OSTI ID:: 1390049

Report Number(s):: JLAB-PHY--17-2552; JLAB-PHY--17-2552

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 119; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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