Strong decays of charmonium-like state Y(4230) and radiative transitions of low-lying charmoniums
Семинары
Семинар «Физика адронов»
Дата и время: пятница, 10 марта 2023 г., в 11:00
Место: Онлайн конференция в Zoom, аудитория им. Блохинцева (4-й этаж), Лаборатория теоретической физики им. Н. Н. Боголюбова
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Тема семинара: «Strong decays of charmonium-like state Y(4230) and radiative transitions of low-lying charmoniums»
Докладчик: Гурджав Ганболд
Аннотация:
Strong hidden-charm decays of the charmonium-like state Y(4320) as well as the dominant radiative transitions of the charmonium low-lying states have been studied in the framework of the covariant confined quark model.
The resonance Y has been interpreted as a four-quark state of the molecular type. The strong decay modes Y→π+π−J/Ψ and Y→K+K−J/Ψ have been studied by involving the scalar resonance state f0(980). We have calculated the fractal widths of the related strong decays and the branching ratio B(Y→K+K−J/Ψ) / B(Y→π+π−J/Ψ), recently determined by the BESIII collaboration.
The gauge-invariant transition amplitudes have been expressed by either using the conventional Lorentz structures or the helicity amplitudes, when it was effective, by investigating the main radiative transitions of the charmonium S- and P-wave states. Only one adjustable parameter common to all six charmonium states has been introduced to describe the quark distribution inside the hadron. For the states J/Ψ(3S1), χc0(3P0), χc1(3P1), hc(1P1) and χc2(3P2), we calculated the fractional widths of one-photon radiative decays.
Estimated results are in good agreement with the latest experimental data.