https://doi.org/10.1140/epjc/s10052-022-10333-w
Regular Article - Theoretical Physics
Spectroscopic parameters and electromagnetic form factor of kaon in vacuum and a dense medium
1
Department of Physics, Bolu Abant İzzet Baysal University, Gölköy Kampüsü, 14030, Bolu, Turkey
2
Department of Physics, University of Tehran, North Karegar Ave., 14395-547, Tehran, Iran
3
Department of Physics, Doǧuş University, Dudullu-Ümraniye, 34775, Istanbul, Turkey
Received:
22
March
2022
Accepted:
14
April
2022
Published online:
3
May
2022
The spectroscopic parameters as well as electromagnetic form factor of the strange particle kaon are investigated in vacuum and a medium with finite density. The obtained vacuum mass and decay constant, which are consistent with the existing experimental results, are used to extract the 
dependence of the kaon electromagnetic form factor in the interval 
GeV
in vacuum. The obtained results at lower and intermediate values of are consistent with the existing experimental data within the presented uncertainties. The behavior of the electromagnetic form factor of kaon in vacuum and in the interval 
GeV is in a nice agreement with the existing predictions of the Lattice QCD and the solution of the Bethe–Salpeter equation for the model of Nambu and Jona-Lasinio (NJL) with proper-time regularization, as well. The obtained vacuum radius for kaon is also in a nice agreement with the world’s average experimental result. We extend the analyses to a medium with higher densities and obtain the behavior of the mass, decay constant, electromagnetic form factor and radius with respect to density. The obtained results for some of the parameters are compared with the existing predictions of other models and approaches. The results obtained in the present study can be useful for future experimental and theoretical studies both in vacuum and a dense medium.
© The Author(s) 2022
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