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Title: Hyperon III: $$K^{-}p - \pi \varSigma $$ coupled-channel dynamics in the $$\varLambda (1405)$$ mass region

Abstract

Abstract Low-energy data on the three charge states in $$\gamma p \rightarrow K^+(\varSigma \pi )$$ γ p K + ( Σ π ) from CLAS at JLab, on $$K^-p\rightarrow \pi ^0\pi ^0\varLambda $$ K - p π 0 π 0 Λ and $$\pi ^0\pi ^0\varSigma $$ π 0 π 0 Σ from the Crystal Ball at BNL, bubble chamber data on $$K^-p\rightarrow \pi ^-\pi ^+\pi ^{\pm }\varSigma ^{\mp }$$ K - p π - π + π ± Σ , low-energy total cross sections on $$K^-$$ K - induced reactions, and data on the $$K^-p$$ K - p atom are fitted with the BnGa partial-wave-analysis program. We find that the data can be fitted well with just one isoscalar spin-1/2 negative-parity pole, the $$\varLambda (1405)$$ Λ ( 1405 ) , and background contributions. In a fit with one isocsalar state, the $$\varLambda (1405)$$ Λ ( 1405 ) structure can be determined as a dominantly SU(3) singlet state. A fit with two isoscalar singlet states, with imposed properties of the low-mass state, is, however, also not incompatible with data.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1783419
Alternate Identifier(s):
OSTI ID: 1646614
Report Number(s):
JLAB-PHY-20-3218; DOE/OR-23177-5019
Journal ID: ISSN 1434-6001; 139; PII: 142
Grant/Contract Number:  
AC05-06OR23177; FG02-87ER40315; RSF 16-12-10267; SFB/TR110
Resource Type:
Published Article
Journal Name:
European Physical Journal. A
Additional Journal Information:
Journal Name: European Physical Journal. A Journal Volume: 56 Journal Issue: 5; Journal ID: ISSN 1434-6001
Publisher:
Springer Science + Business Media
Country of Publication:
Germany
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Anisovich, A. V., Sarantsev, A. V., Nikonov, V. A., Burkert, V., Schumacher, R. A., Thoma, U., and Klempt, E. Hyperon III: $$K^{-}p - \pi \varSigma $$ coupled-channel dynamics in the $$\varLambda (1405)$$ mass region. Germany: N. p., 2020. Web. doi:10.1140/epja/s10050-020-00142-8.
Anisovich, A. V., Sarantsev, A. V., Nikonov, V. A., Burkert, V., Schumacher, R. A., Thoma, U., & Klempt, E. Hyperon III: $$K^{-}p - \pi \varSigma $$ coupled-channel dynamics in the $$\varLambda (1405)$$ mass region. Germany. https://doi.org/10.1140/epja/s10050-020-00142-8
Anisovich, A. V., Sarantsev, A. V., Nikonov, V. A., Burkert, V., Schumacher, R. A., Thoma, U., and Klempt, E. Tue . "Hyperon III: $$K^{-}p - \pi \varSigma $$ coupled-channel dynamics in the $$\varLambda (1405)$$ mass region". Germany. https://doi.org/10.1140/epja/s10050-020-00142-8.
@article{osti_1783419,
title = {Hyperon III: $$K^{-}p - \pi \varSigma $$ coupled-channel dynamics in the $$\varLambda (1405)$$ mass region},
author = {Anisovich, A. V. and Sarantsev, A. V. and Nikonov, V. A. and Burkert, V. and Schumacher, R. A. and Thoma, U. and Klempt, E.},
abstractNote = {Abstract Low-energy data on the three charge states in $$\gamma p \rightarrow K^+(\varSigma \pi )$$ γ p → K + ( Σ π ) from CLAS at JLab, on $$K^-p\rightarrow \pi ^0\pi ^0\varLambda $$ K - p → π 0 π 0 Λ and $$\pi ^0\pi ^0\varSigma $$ π 0 π 0 Σ from the Crystal Ball at BNL, bubble chamber data on $$K^-p\rightarrow \pi ^-\pi ^+\pi ^{\pm }\varSigma ^{\mp }$$ K - p → π - π + π ± Σ ∓ , low-energy total cross sections on $$K^-$$ K - induced reactions, and data on the $$K^-p$$ K - p atom are fitted with the BnGa partial-wave-analysis program. We find that the data can be fitted well with just one isoscalar spin-1/2 negative-parity pole, the $$\varLambda (1405)$$ Λ ( 1405 ) , and background contributions. In a fit with one isocsalar state, the $$\varLambda (1405)$$ Λ ( 1405 ) structure can be determined as a dominantly SU(3) singlet state. A fit with two isoscalar singlet states, with imposed properties of the low-mass state, is, however, also not incompatible with data.},
doi = {10.1140/epja/s10050-020-00142-8},
journal = {European Physical Journal. A},
number = 5,
volume = 56,
place = {Germany},
year = {2020},
month = {5}
}

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