Strong Evidence for Nucleon Resonances near 1900 MeV
- 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+, M1-, 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 JP=1/2-, 1/2+, and 3/2+ in the region at about 1.9 GeV.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), 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
- Grant/Contract Number:
- SFB/TR110; SFB1044; ST/L005719/1; RSF 16-12-10267
- OSTI ID:
- 1390049
- Alternate ID(s):
- OSTI ID: 1375259
- Report Number(s):
- JLAB-PHY-17-2552; PRLTAO; TRN: US1702822
- Journal Information:
- Physical Review Letters, Vol. 119, Issue 6; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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