The phenomenology of the exotic hybrid nonet with $π_1(1600)$ and $η_1(1855)$

Shastry, Vanamali; Fischer, Christian; Giacosa, Francesco

doi:10.48550/arxiv.2203.04327

Cited by 3 publications

(5 citation statements)

References 49 publications

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“…Possible channels for detecting the missing states were suggested. In a recent study [1059], the authors studied the decays of this hybrid nonet using a Lagrangian invariant under the flavor symmetry, parity reversal, and charge conjugation. Their results suggest that the light isoscalar is significantly narrow, while the width of the heavy isoscalar can be matched to the recently observed η 1 (1855).…”

Section: Light Hybrid Mesonsmentioning

confidence: 99%

An updated review of the new hadron states

Chen¹,

Chen²,

Liu³

et al. 2022

Preprint

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The past decades witnessed the golden era of hadron physics. Many excited open heavy flavor mesons and baryons have been observed since 2017. We shall provide an updated review of the recent experimental and theoretical progresses in this active field. Besides the conventional heavy hadrons, we shall also review the recently observed open heavy flavor tetraquark states X(2900) and T + cc (3875) as well as the hidden heavy flavor multiquark states X(6900), P cs (4459) 0 , Z cs (3985) − , Z cs (4000) + , and Z cs (4220) + . We will also cover the recent progresses on the glueballs and light hybrid mesons, which are the direct manifestations of the non-Abelian SU (3) gauge interaction of the Quantum Chromodynamics in the low-energy region.

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Section: Light Hybrid Mesonsmentioning

confidence: 99%

An updated review of the new hadron states

Chen¹,

Chen²,

Liu³

et al. 2022

Preprint

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“…Recently, the BESIII Collaboration observed η 1 (1855) in the J/ψ → γηη ′ decay [2]. Since the η 1 (1855) is an isoscalar resonance with exotic J PC = 1 −+ quantum numbers, different explanations of exotic states like hybrid [4][5][6], the K K1 (1400) molecular state [7,8], and tetraquark state [9] were proposed, which shows that this observation attracted theorist's attention in the past months. Besides decoding the nature of the observed η 1 (1855), establishing the η 1 (1855) in experiment is also crucial.…”

Section: Discussionmentioning

confidence: 99%

“…respectively. Obviously, the observed η 1 (1855) cannot be grouped into the conventional hadron, which is a good candidate of exotic states as indicated by some theoretical groups, where the η 1 (1855) was interpreted as a hybrid state [4][5][6], a molecular state [7,8], and a tetraquark state [9]. At present, the η 1 (1855) was only observed in the radiative decay J/ψ → γηη ′ , confirming this observation by others processes is an interesting experimental topic, which will be helpful to establish this exotic state in experiment and may provide some valuable information to reflect its inner structure.…”

Section: Introductionmentioning

confidence: 99%

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Production of the $η_{1}(1855)$ through kaon induced reactions under the assumptions that it is a molecular or a hybrid state

Wang¹,

Zeng²,

Liu³

2022

Preprint

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By the reaction of kaon interacting with a proton, we investigate the production of the newly observed η 1 (1855) and its C-parity partner η ′ 1 (1855) predicted in the picture of the K K1 (1400) molecular state. The total and differential cross sections of the concrete K − p → η 1 (1855)Λ and η ′ 1 (1855)Λ reactions are obtained. At the center of mass energies about 3.4∼3.6 GeV, the minimum cross-section of η 1 (1855) and and η ′ 1 (1855) production via the K − p reaction are about 0.59 nb and 19.2 nb, respectively. The differential cross sections for both reactions at the different center of mass energies are also available. Furthermore, we present the Dalitz processes of 2 → 3 and 2 → 4, and initially discuss the feasibility of finding out the η 1 (1855) and η ′ 1 (1855) in experiments like J-PARC.

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“…In the literature, the hybrid explanation of η 1 (1855) was proposed [16][17][18]. In physics, in fact the exotic quantum number J P C = 1 −+ can also be assigned to a tetraquark state.…”

Section: Introductionmentioning

confidence: 99%

A possible structure of newly found exotic state $η_1(1855)$

Wan¹,

Zhang²,

Qiao³

2022

Preprint

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Recently, a hadronic state, named η 1 (1855), about 1.86 GeV was observed in BESIII experiment. This finding has a peculiar interest due to its exotic quantum number J P C = 1 −+ . In this paper, we examine the tetraquark interpretation for the structure of η 1 (1855) in the configurations of [1 c ] ss ⊗[1 c ] qq and [1 c ] sq ⊗ [1 c ] sq , and perform a mass spectrum calculation in the framework of QCD sum rules. The results show that the observed η 1 (1855) could be embedded into the [1 c ] ss ⊗ [1 c ] qq configuration.The possible tetraquark and hybrid decay modes are analyzed, which are critical in decoding its inner structure. By the same way, we evaluate as well the ssss molecular state with 1 −+ quantum number and find that there might exist two such ground states.

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The phenomenology of the exotic hybrid nonet with $π_1(1600)$ and $η_1(1855)$

Cited by 3 publications

References 49 publications

An updated review of the new hadron states

An updated review of the new hadron states

Production of the $η_{1}(1855)$ through kaon induced reactions under the assumptions that it is a molecular or a hybrid state

A possible structure of newly found exotic state $η_1(1855)$

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