| 000 | 03502nlm1a2200373 4500 | ||
|---|---|---|---|
| 001 | 668024 | ||
| 005 | 20231030042134.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\39235 | ||
| 035 | _aRU\TPU\network\6837 | ||
| 090 | _a668024 | ||
| 100 | _a20220530a2021 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 102 | _aUS | ||
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aRadiative transitions of charmonium states in the covariant confined quark model _fG. Ganbold, T. Gutsche, M. A. Ivanov, V. E. Lyubovitskiy (Lyubovitskij) |
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| 203 |
_aText _celectronic |
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| 300 | _aTitle screen | ||
| 320 | _a[References: 65 tit.] | ||
| 330 | _aWe have studied the dominant radiative transitions of the charmonium S- and P-wave states within the covariant confined quark model. The gauge invariant leading-order transition amplitudes have been expressed by using either the conventional Lorentz structures, or the helicity amplitudes, where it was effective. The renormalization couplings of the charmonium states have been strictly fixed by the compositeness conditions that excludes the constituent degrees of freedom from the space of physical states. We use the basic model parameters for the constituent c-quark mass mc=1.80 GeV and the global infrared cutoff λ=0.181 GeV. We additionally introduce only one adjustable parameter ϱ>0 common for the charmonium states ηc(1S0), J/ψ(3S1), χc0(3P0), χc1(3P1), hc(1P1), and χc2(3P2) to describe the quark distribution inside the hadron. This parameter describes the ratio between the charmonium “size” and its physical mass. The optimal value ϱ=0.485 has been fixed by fitting the latest data for the partial widths of the one-photon radiative decays of the triplet χcJ(3PJ),J={0,1,2}. Then, we calculate corresponding fractional widths for states J/ψ(3S1) and hc(1P1). Estimated results are in good agreement with the latest data. By using the fraction data from PDG2020 and our estimated partial decay width for hc(1P1) we recalculate the “theoretical full width” Γtheorhc≃(0.57±0.12) MeV in comparison with latest data Γexphc≃(0.7±0.4) MeV. We also repeated our calculations by gradually decreasing the global cutoff parameter and revealed that the results do not change for any λ<0.181 GeV up to the “deconfinement” limit. | ||
| 333 | _aРежим доступа: по договору с организацией-держателем ресурса | ||
| 461 |
_tPhysical Review D _ocovering particles, fields, gravitation, and cosmology |
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| 463 |
_tVol. 104, iss. 9 _v[094048, 15 p.] _d2021 |
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| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aтруды учёных ТПУ | |
| 701 | 1 |
_aGanbold _bG. _gGurjav |
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| 701 | 1 |
_aGutsche _bT. _gThomas |
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| 701 | 1 |
_aIvanov _bM. A. _gMikhail |
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| 701 | 1 |
_aLyubovitskiy (Lyubovitskij) _bV. E. _cphysicist _cProfessor of Tomsk Polytechnic University, Doctor of physical and mathematical sciences, Professor of the University of Tubingen (Germany) _f1963- _gValery Efimovich _2stltpush _3(RuTPU)RU\TPU\pers\33385 |
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| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет _bШкола базовой инженерной подготовки _bОтделение математики и информатики _h8031 _2stltpush _3(RuTPU)RU\TPU\col\23555 |
| 801 | 2 |
_aRU _b63413507 _c20220530 _gRCR |
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| 856 | 4 | _uhttps://doi.org/10.1103/PhysRevD.104.094048 | |
| 942 | _cCF | ||