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Electroweak properties of kaons in a nuclear medium
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abstract
Kaon electroweak properties in symmetric nuclear matter are studied in the Nambu--Jona-Lasinio model using the proper-time regularization. The valence quark properties in symmetric nuclear matter are calculated in the quark-meson coupling model, and they are used as inputs for studying the in-medium kaon properties in the NJL model. We evaluate the kaon decay constant, kaon-quark coupling constant, and $K^+$ electromagnetic form factor by two different approaches. Namely, by two different ways of calculating the in-medium constituent quark masses of the light quarks. We predict that, in both approaches, the kaon decay constant and kaon-quark coupling constant decrease as nuclear density increases, while the $K^+$ charge radius increases by 20-25\% at normal nuclear density.
Forward citations
Cited by 3 Pith papers
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In-medium electromagnetic form factors of pseudoscalar mesons from the quark model
A hybrid light-front quark model plus quark-meson coupling calculation predicts that in nuclear matter the charge radii of pseudoscalar mesons grow, driven mainly by the light quark sector.
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Kaon structure modifications in strange hadronic matter
Using two quark models, the authors predict that in dense strange matter the kaon's form factors shrink and its strange-antiquark charge density moves away from the center.
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Valence quark properties of charged kaons in symmetric nuclear matter
Charged kaon valence-quark TMDs and GPDs are computed with the light-cone quark model using in-medium quark masses from the chiral SU(3) quark mean field model, producing density-dependent form factors and charge radii.
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