Revisiting radiative transitions of charmonium states in covariant confined quark model

2025/09/17 by Issadykov, Aidos, Ivanov, Mikhail A., Nguyen, Dang-Khoa N. +3 · 1 citation
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2509.13657

Abstract

We calculate the amplitudes and branching fractions of χ_cJ, h_c, J/ψ, and ψ(2S) radiative decays in the framework of the covariant confined quark model. First, we explicitly show that all calculated amplitudes are gauge invariant. Next, we use experimental data for three decay channels J/ψ→ η_cγ, χ_c0→ J/ψγ, and ψ(2S)→ χ_c0γ to fit the model parameters including the charm quark mass and the meson size parameter. Finally, we use the obtained parameters to predict the branching fractions of the decays h_c→η_cγ, χ_c1(c2)→ J/ψγ, and ψ(2S)→χ_c1(c2)γ. Our predictions agree well with experimental data.

Citations

• ArXiv

Cited by

• Selected decays of B_s meson in covariant confined quark model

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