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

Journal Article · · European Physical Journal. A
 [1];  [2];  [3];  [4];  [5];  [1];  [3];  [1];  [3];  [6];  [7]
  1. Univ. of Bonn (Germany); Particle and Nuclear Physics Inst., Gatchina (Russia)
  2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  3. Univ. of Tuzla (Bosnia and Herzegovina)
  4. Univ. of Glasgow, Scotland (United Kingdom)
  5. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Univ. of Bonn (Germany)
  6. Rudjer Boskovic Inst., Zagreb (Croatia)
  7. 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 $J^P = 1/2^+$, $3/2^+, 1/2^-, 3/2^-, 5/2^-$.

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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Cited By (3)

Decay patterns of low-lying N s s ¯ states via strangeness channels journal October 2018
Towards the minimal spectrum of excited baryons journal January 2019
The impact of $K^{+}\Lambda$ K + Λ photoproduction on the resonance spectrum journal June 2018

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