QCD axial anomaly enhances the $ηη^\prime$ decay of the hybrid candidate $η_1(1855)$

Chen, Hua-Xing; Su, Niu; Zhu, Shi-Lin

doi:10.48550/arxiv.2202.04918

Cited by 6 publications

(12 citation statements)

References 66 publications

(86 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the K K1 (1400) molecular of η 1 (1835) has been successfully explained theoretically, the internal structure of η 1 (1855) is still controversial. The QCD axial anomaly support the interpretation of the η 1 (1855) as the ssg hybrid meson [28]. Their results indicate that ηη ′ decay mode to be a characteristic signal of the hybrid nature of the η 1 (1855).…”

Section: Introductionsupporting

confidence: 62%

“…The experimental measurements for such a strong decay process could be crucial to test the nature of the η 1 (1855). Because the ηη ′ decay channel play the dominant role when the η 1 (1855) is explained as the ssg hybrid meson [28]. The partial width for η 1 (1855) → γφ can reach up to 10.16 +0.19 −0.35 KeV, which can be detected in many experiment.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the $η_1(1855)$ as a $K\bar{K}_1(1400)$ molecular state

Feng¹,

Yin²

2022

Preprint

View full text Add to dashboard Cite

In this work, we study the radiative and strong decay of S -wave K K1 (1400) molecular state within the effective Lagrangians approach and find the relation between the K K1 (1400) molecular state and the newly observed η 1 (1855) state by comparing with the BESIII observation. The prediction indicates that the decay width depends on the model parameter can reach up to 197.27 +1.64 −1.22 MeV, which can be confronted with the experimental data. If the η 1 (1855) could be S -wave K K1 (1400) molecular state, the K K * π three-body decay provides the dominant contribution, not the ηη ′ channel found in the experiment. In addition, the partial width for η 1 (1855) → γφ can reach up to 10.16 +0.19 −0.35 KeV. Those results can be measured in future experiments and can be used to test the nature of the η 1 (1855).

show abstract

Section: Introductionsupporting

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Analysis of the $η_1(1855)$ as a $K\bar{K}_1(1400)$ molecular state

Feng¹,

Yin²

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The η 1 (1855) is the first observed candidate of isoscalar 1 −+ hybrid [38,39,61,62]. Further studies with more production mechanisms and decay modes will help clarify the nature of the η 1 (1855).…”

Section: B Gluonic Excitationsmentioning

confidence: 98%

Hadron spectroscopy at STCF

Guo¹,

Peng²,

Xie³

et al. 2022

Preprint

View full text Add to dashboard Cite

I. INTRODUCTIONDespite that quantum chromodynamics (QCD), the theory of strong interaction, has colorful quarks and gluons as its basic degrees of freedom, all fundamental particles participating the strong interaction that can be directly detected in experiments are colorless or color-singlet hadrons. This phenomenon is called color confinement. Because of that, the study of hadron spectroscopy is essential in improving our understanding of the nonperturbative regime of QCD and to reveal the mechanism of color confinement. The high-luminosity electron-positron collision machine under discussion, Super τ -Charm Facility (STCF), can play an essential role in hadron spectroscopy by discovering new hadron resonances and measuring properties of known hadrons with an unprecedented precision. In the following, we will discuss briefly the topics on hadron spectroscopy that will be investigated at STCF. II. PHYSICS LANDSCAPE A. Highly excited charmonia and charmonium-like statesCharmonium states being bound states of a charm and an anticharm quark were supposed to be well described by nonrelativistic potential quark models [1,2]. This was the case before 2003.Since the discovery of the X(3872), also known as χ c1 (3872), by Belle in 2003 [3], there have been a large number of new resonance(-like) structures observed in the charmonium mass region by various experiments, including BESIII, BaBar, Belle, CDF, D0, ATLAS, CMS and LHCb (see e.g.

show abstract

“…In the light quark sector two potential hybrid states, the isovector π 1 (1600) [2] and the very recently observed isoscalar η 1 (1855) [3], have been identified as states with quantum numbers J PC = 1 −+ . The observation of the hybrid isoscalar has piqued the interests of the community [4][5][6], since it may provide important guidance for high-quality predictions of masses and decay widths of the missing members of the J PC = 1 −+ -nonet. The members of (light) hybrid nonet are the subject matter of the present study.…”

Section: Introductionmentioning

confidence: 99%

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

Shastry¹,

Fischer²,

Giacosa³

2022

Preprint

View full text Add to dashboard Cite

We study the decays of the J PC = 1 −+ hybrid nonet using a Lagrangian invariant under the flavor symmetry, parity reversal, and charge conjugation. We use the available experimental data, the lattice predictions, and the flavor constraints to evaluate the coupling strengths of the π 1 (1600) to various two-body mesonic states. Using these coupling constants, we estimate the partial widths of the two-body decays of the hybrid pion, kaon and the isoscalars. We find that the hybrid kaon can be nearly as broad as the π 1 (1600). Quite remarkably, we find also that the light isoscalar must be significantly narrow while the width of the heavy isoscalar can be matched to the recently observed η 1 (1855).

show abstract

QCD axial anomaly enhances the $ηη^\prime$ decay of the hybrid candidate $η_1(1855)$

Cited by 6 publications

References 66 publications

Analysis of the $η_1(1855)$ as a $K\bar{K}_1(1400)$ molecular state

Analysis of the $η_1(1855)$ as a $K\bar{K}_1(1400)$ molecular state

Hadron spectroscopy at STCF

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

Contact Info

Product

Resources

About