Journal Article

FZJ-2021-00914

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Hyperon electromagnetic form factors in the timelike region

Haidenbauer, J. (Corresponding author)FZJ* ; Meißner, U.-G.FZJ* ; Dai, L.-Y.

2021
Inst.812068 Melville, NY

This record in other databases:    

Please use a persistent id in citations: http://hdl.handle.net/2128/27645  doi:10.1103/PhysRevD.103.014028

Abstract: Electromagnetic form factors of hyperons (Λ, Σ, Ξ) in the timelike region, accessible in the reaction e+e−→¯YY, are studied. The focus is on energies close to the reaction thresholds, where the properties of these form factors are significantly influenced by the interaction in the final ¯YY system. This interaction is taken into account in the calculation, utilizing ¯YY potential models that have been constructed by the Jülich group for the analysis of data from the reaction ¯pp→¯YY in the past. The enhancement of the effective form factor for energies close to the threshold, seen in experiments of e+e−→¯ΛΛ and e+e−→¯Σ0Λ, is reproduced. With regard to the reactions e+e−→¯Σ−Σ+, ¯Σ0Σ0, ¯Σ+Σ− a delicate interplay between the three channels is observed in the results at low energies, caused by the ¯ΣΣ interaction. Predictions for the electromagnetic form factors GM and GE in the timelike region are presented for the Λ, Σ, and Ξ hyperons.

---

Contributing Institute(s):

1. Theorie der Starken Wechselwirkung (IAS-4)
2. Theorie der starken Wechselwirkung (IKP-3)

Research Program(s):

1. 5111 - Domain-Specific Simulation Data Life Cycle Labs (SDLs) and Research Groups (POF4-511) (POF4-511)
2. DFG project 196253076 - TRR 110: Symmetrien und Strukturbildung in der Quantenchromodynamik (196253076) (196253076)

Appears in the scientific report 2021

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

---