The spin parity of $Z_c^-$(4100), $Z_1^+$(4050) and $Z_2^+$(4250)

Cao, Xu; Dai, Jian-Ping

doi:10.48550/arxiv.1811.06434

Cited by 7 publications

(11 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The spin-parity assignments J P = 0 + and 1 − are both consistent with the experimental data [13]. Is it a candidate for a scalar tetraquark state [12,14,15], hadrocharmonium [16], D * D * molecular state [17], or charge conjugation of the Z + c (4050) [18] ? In Refs.…”

Section: Introductionsupporting

confidence: 69%

“…The larger uncertainties +0. 18 −0.17 GeV and +0.19 −0.18 GeV (compared to the uncertainties ±0.05 GeV, ±0.10 GeV and +0.08 −0.09 GeV) in the ground state masses originate from the QCD sum rules, where both the ground state and the first radial excited state are taken into account at the hadron side. If only the ground states are taken into account in the QCD sum rules, the uncertainties |δM | ≤ 0.10 GeV, so the uncertainties +0.…”

Section: Introductionmentioning

confidence: 94%

See 1 more Smart Citation

Scalar or Vector Tetraquark State Candidate: Z_c(4100)*

Wang¹

2019

Commun. Theor. Phys.

View full text Add to dashboard Cite

In this article, we separate the vector and axialvector components of the tensor diquark operators explicitly, construct the axialvector-axialvector type and vector-vector type scalar tetraquark currents and scalar-tensor type tensor tetraquark current to study the scalar, vector and axialvector tetraquark states with the QCD sum rules in a consistent way. The present calculations do not favor assigning the Zc(4100) to be a scalar or vector tetraquark state. If the Zc(4100) is a scalar tetraquark state without mixing effects, it should have a mass about 3.9 GeV or 4.0 GeV rather than 4.1 GeV; on the other hand, if the Zc(4100) is a vector tetraquark state, it should have a mass about 4.2 GeV rather than 4.1 GeV. However, if we introduce mixing, a mixing scalar tetraquark state can have a mass about 4.1 GeV. As a byproduct, we obtain an axialvector tetraquark candidate for the Zc(4020).

show abstract

Section: Introductionsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 94%

Scalar or Vector Tetraquark State Candidate: Z_c(4100)*

Wang¹

2019

Commun. Theor. Phys.

View full text Add to dashboard Cite

show abstract

“…In Ref. [810], Cao and Dai discussed possible J P assignments for the Z c (4100), Z 1 (4050) [called Z c (4050) in PDG [35]], and Z 2 (4250) and proposed that the Z c (4100) observed in η c π by LHCb [67] and the Z 1 (4050) observed in χ c1 π by Belle [811] correspond to the same state. They suggested that the Z 2 (4250) should be a 1 + or 1 − state, while the Z c (4100)/Z 1 (4050) could be a 0 + or 1 − state.…”

Section: The Y Statesmentioning

confidence: 99%

Pentaquark and Tetraquark states

Liu,

Chen,

Chen

et al. 2019

Preprint

View full text Add to dashboard Cite

The past seventeen years have witnessed tremendous progress on the experimental and theoretical explorations of the multiquark states. The hidden-charm and hidden-bottom multiquark systems were reviewed extensively in Ref. [1]. In this article, we shall update the experimental and theoretical efforts on the hidden heavy flavor multiquark systems in the past three years. Especially the LHCb collaboration not only confirmed the existence of the hidden-charm pentaquarks but also provided strong evidence of the molecular picture. Besides the well-known XY Z and P c states, we shall discuss more interesting tetraquark and pentaquark systems either with one, two, three or even four heavy quarks. Some very intriguing states include the fully heavy exotic tetraquark states QQ Q Q and doubly heavy tetraquark states QQq q, where Q is a heavy quark. The QQ Q Q states may be produced at LHC while the QQq q system may be searched for at BelleII and LHCb. Moreover, we shall pay special attention to various theoretical schemes such as the chromomagnetic interaction (CMI), constituent quark model, meson exchange model, heavy quark and heavy diquark symmetry, QCD sum rules, Faddeev equation for the three body systems, Skyrme model and the chiral quark-soliton model, and the lattice QCD simulations. We shall emphasize the model-independent predictions of various models which are truly/closely related to Quantum Chromodynamics (QCD). For example, the chromomagnetic interaction arises from the gluon exchange which is fundamental and universal in QCD and responsible for the mixing and mass splitting of the conventional mesons and baryons within the same multiplet. The same CMI

show abstract

“…In this case, the Z cs (4220) would be an excited state of Z cs (3985). If considering them as two different states, the Z cs (3985) → J/ψ K decay is suppressed in the limit of the HQSS [47], and the Z cs (4220) at LHCb would be the expected axial-vector (4220) at LHCb, is predicted by HQSS within hadroquarkonium framework [13] together with another Z cs (4350) as the respective partners of Z c (4100) [48] and Z c (4200) [49] (for a discussion of their spin-parity see [50]).…”

Section: Introductionmentioning

confidence: 99%

Hunting for the heavy quark spin symmetry partner of $$Z_{cs}$$

Cao

Yang

2022

Eur. Phys. J. C

Self Cite

View full text Add to dashboard Cite

The discovery of a charged strange hidden-charm state $$Z_{cs}$$ Z cs (3985) implies another higher $$Z^*_{cs}$$ Z cs ∗ state coupling to $${\bar{D}}_s^{*-}D^{*0} + c.c$$ D ¯ s ∗ - D ∗ 0 + c . c under the heavy quark spin symmetry. In this paper we discuss a possible hunt for it with data taken at existing facilities. We point out a hint for $$Z^*_{cs}$$ Z cs ∗ in the data of $${\bar{B}}_s^0 \rightarrow J/\psi K^- K^+$$ B ¯ s 0 → J / ψ K - K + at LHCb, though weak, in line with the production mechanism of pentaquark $$P_c$$ P c . We also study the triangular singularity which would possibly enhance the production of $$Z^*_{cs}$$ Z cs ∗ in electron-positron collision. Surprisingly, the production rate of $$Z^*_{cs}$$ Z cs ∗ is expected to be maximum at the $$e^+ e^-$$ e + e - center of mass energy of 4.648 GeV, which is lower than 4.681 GeV for $$Z_{cs}$$ Z cs due to the inverted coupling hierarchy of $$D_{s1}{\bar{D}}^* K$$ D s 1 D ¯ ∗ K and $$D_{s2}{\bar{D}}K$$ D s 2 D ¯ K in the triangle diagrams. Their bottom analogue under heavy quark flavor symmetry is also discussed. Our theoretical analysis would confront with future experiment of LHCb, BESIII, and Bell II.

show abstract

The spin parity of $Z_c^-$(4100), $Z_1^+$(4050) and $Z_2^+$(4250)

Cited by 7 publications

References 38 publications

Scalar or Vector Tetraquark State Candidate: Z_c(4100)*

Scalar or Vector Tetraquark State Candidate: Z_c(4100)*

Pentaquark and Tetraquark states

Hunting for the heavy quark spin symmetry partner of $$Z_{cs}$$

Contact Info

Product

Resources

About

The spin parity of $Z_c^-$(4100), $Z_1^+$(4050) and $Z_2^+$(4250)

Cited by 7 publications

References 38 publications

Scalar or Vector Tetraquark State Candidate: Zc(4100)*

Scalar or Vector Tetraquark State Candidate: Zc(4100)*

Pentaquark and Tetraquark states

Hunting for the heavy quark spin symmetry partner of $$Z_{cs}$$

Contact Info

Product

Resources

About

Scalar or Vector Tetraquark State Candidate: Z_c(4100)*

Scalar or Vector Tetraquark State Candidate: Z_c(4100)*