Radiative production and decays of the exotic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msubsup><mml:mrow><mml:mi>η</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn></mml:mrow><mml:mrow><mml:mo>′</mml:mo></mml:mrow></mml:msubsup><mml:mo stretchy="false">(</mml:mo><mml:mn>1855</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> and its siblings

Shastry, Vanamali; Giacosa, Francesco

doi:10.1016/j.nuclphysa.2023.122683

Cited by 6 publications

(4 citation statements)

References 78 publications

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“…Table 2. Radiative decay width (in units of KeV) of the η 1 (1855) for two values of isoscalar mixing angle θ (see [29,43]).…”

Section: 529mentioning

confidence: 99%

“…The only difference is the partial widths for the η 1 (1855) → γω, γρ, and γf decay channels. By assuming the η 1 (1855) as a hybrid meson, the radiative decay width of the η 1 (1855) was estimated [43] and collected in table 2. With the helping of the equation (4), the values of the coupling constants h g g V…”

Section: Decay Widthmentioning

confidence: 99%

“…for two different θ are evaluated and can be found in table 2. Please note that the θ is the mixing angle of nonstrange and strange components in a physical hybrid isoscalar mesons [29,43]. It can be obtained by fitting the experimental data and an example can be found in [44].…”

Section: Decay Widthmentioning

confidence: 99%

“…It can be obtained by fitting the experimental data and an example can be found in [44]. Here, θ = 15o and 0 o are used because these two values can give a better description of the η 1 (1855) [29,43].…”

Section: Decay Widthmentioning

confidence: 99%

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Revealing the inner structure of the newly observed η ₁(1855) via photoproduction

Huang

Zhu

2023

J. Phys. G: Nucl. Part. Phys.

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Very recently, a new hadronic exotic state $\eta_1(1855)$ at the invariant mass spectrum of $\eta\eta^{'}$ was observed by the BESIII Collaboration.According to its properties, such as the mass and decay width, the $\eta_1(1855)$ have been suggested to be a compact multi-quark state, a hadronmolecule, or a hybrid meson. In order to distinguish the various interpretations of the $\eta_1(1855)$, a Reggeized model combined with the vectordominance model for $\eta_1(1855)$ photoproduction on the proton target is presented. The $\eta_1(1855)$ photoproduction is dominated by the $t$-channelvector mesons $\rho$, $\omega$, and $\phi$ exchange. If the $\eta_1(1855)$ is a $s\bar{s}g$ hybrid meson, the Primakoff effect also should be included.Our calculations show that the total cross section of the $\eta_1(1855)$ production via $\gamma{}p$ reaction can reach up to 0.276 pb for $\theta=15^{\circ}$or 0.119 pb for $\theta=0^{\circ}$, about 0.0297$\%$ or 0.0128$\%$ of the total cross section obtained by considering the$\eta_1(1855)$ as an $S$-wave $K\bar{K}_1(1400)$ molecule. We also find their line shapes are sizably different. If the $\eta_1(1855)$ is a molecular state,the photoproduction of $\eta_1(1855)$ near the threshold offers a nice place to test its molecular nature. However, it should be better to take high energy,at least above $E_{\gamma}=16.97$ GeV, to observe the production of $\eta_1(1855)$ if $\eta_1(1855)$ is a $s\bar{s}g$ hybrid meson. These results can be measuredin the GlueX experiment or Electron-Ion Collider in China to test the nature of the $\eta_1(1855)$.

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“…Table 2. Radiative decay width (in units of KeV) of the η 1 (1855) for two values of isoscalar mixing angle θ (see [29,43]).…”

Section: 529mentioning

confidence: 99%

Section: Decay Widthmentioning

confidence: 99%

Section: Decay Widthmentioning

confidence: 99%

Section: Decay Widthmentioning

confidence: 99%

See 2 more Smart Citations

Revealing the inner structure of the newly observed η ₁(1855) via photoproduction

Huang

Zhu

2023

J. Phys. G: Nucl. Part. Phys.

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Revisit the heavy quarkonium double-gluon hybrid mesons with exotic quantum numbers

Lian,

Wang,

Chen

et al. 2024

J. High Energ. Phys.

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We revisit the masses of heavy quarkonium double-gluon hybrid mesons with exotic quantum numbers JPC = 1−+ and 2+− in the framework of the QCD sum rules. Considering the double-gluon hybrid meson operators in the octet-octet color structure, we have constructed two independent interpolating currents with JPC = 1−+ and five independent currents with JPC = 2+−. For the interpolating currents with antisymmetric glueball operator, there exist non-local divergences in one kind of additional Feynman diagrams of the tri-gluon condensate, which will give important contributions to the sum rule stabilities and mass predictions. We use the diagrammatic renormalization to cancel out such divergences. At the leading order of αs, the two-point correlation functions and spectral densities can be expressed in the analytic form of the generalized hypergeometric functions and Meijer’s G-functions. After performing the numerical analysis, we predict the masses of the 1−+ and 2+− charmonium double-gluon hybrid mesons to be around 6.1 − 7.2 GeV and 6.3 − 6.4 GeV, respectively. For the bottomonium systems, their masses are predicted to be 13.7 − 14.3 GeV and 12.6 − 13.3 GeV for the 1−+ and 2+− channels, respectively. Besides, it is possible to hunt for these charmonium hybrids in the radiative decays of bottomonium mesons in BelleII experiment. Further investigations on these hybrid states in various theoretical and phenomenological methods are also anticipated in the future.

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Constructing the JP(C)=1−(+) light flavor hybrid nonet with the newly observed
Chen,
Luo,
Liu
2023
Phys. Rev. D
4
0
0
0
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Radiative production and decays of the exotic η1′(1855) and its siblings

Cited by 6 publications

References 78 publications

Revealing the inner structure of the newly observed η ₁(1855) via photoproduction

Revealing the inner structure of the newly observed η ₁(1855) via photoproduction

Revisit the heavy quarkonium double-gluon hybrid mesons with exotic quantum numbers

Constructing the JP(C)=1−(+) light flavor hybrid nonet with the newly observed
Chen,
Luo,
Liu
2023
Phys. Rev. D
4
0
0
0
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Radiative production and decays of the exotic η1′(1855) and its siblings

Cited by 6 publications

References 78 publications

Revealing the inner structure of the newly observed η 1(1855) via photoproduction

Revealing the inner structure of the newly observed η 1(1855) via photoproduction

Revisit the heavy quarkonium double-gluon hybrid mesons with exotic quantum numbers

Constructing the JP(C)=1−(+) light flavor hybrid nonet with the newly observed Chen, Luo, Liu 2023Phys. Rev. D4000View full textAdd to dashboardCite

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Revealing the inner structure of the newly observed η ₁(1855) via photoproduction

Revealing the inner structure of the newly observed η ₁(1855) via photoproduction

Constructing the JP(C)=1−(+) light flavor hybrid nonet with the newly observed
Chen,
Luo,
Liu
2023
Phys. Rev. D
4
0
0
0
View full text Add to dashboard Cite