Comment on the hadronic decay of excited heavy quarkonia

Yan, Mu‐Lin; Wei, Yi; Zhuang, Ting-Liang

doi:10.1007/s100520050384

Cited by 3 publications

(5 citation statements)

References 3 publications

(11 reference statements)

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“…In Refs. [5,6,8,9], the coupling constant g 3 associates with the small m 2 π is neglected. In this article, we retain the coupling constant g 3 and fit the parameters to the experimental data in four cases: 2CC, 3CC, 2CC + FSI and 3CC + FSI, respectively, where the 2CC denotes the two coupling constants g 1 and g 2 , the 3CC denotes the three coupling constants g 1 , g 2 and g 3 , the FSI denotes the final-state interactions.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…In Ref. [6], Yan, Wei and Zhuang observe that there are Dwave contributions besides the S-wave contributions, although the D-wave contributions are very small. The D-wave contributions were firstly predicted by the Novikov-Shifman model based on the multipole expansion in QCD combined with the chiral symmetry, current algebra and partially conserved axial-vector current [7].…”

Section: Introductionmentioning

confidence: 99%

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The Efficacy of Using Liulishuo for Spoken English Ability—Taking the Practice of Liulishuo in North China Electric Power University (Baoding) as an Example

Yang¹,

Yang²,

Xu³

2019

IES

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In this article, we study the axialvector-diquark-scalar-diquark-antiquark type charmed pentaquark states with J P = 3 2 ± with the QCD sum rules by carrying out the operator product expansion up to the vacuum condensates of dimension 13 in a consistent way. In calculations, we separate the contributions of the negative parity and positive parity pentaquark states unambiguously, and choose three sets input parameters to study the masses and pole residues of the charmed pentaquark states uuucū and ssscs in details. Then we estimate the masses of the charmed pentaquark states ssucū, suscū, ssdcd and sdscd with J P = 3 2 − to be 3.15 ± 0.13 GeV according to the SU (3) breaking effects, which is compatible with the Ω c (3050), Ω c (3066), Ω c (3090), Ω c (3119).

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Efficacy of Using Liulishuo for Spoken English Ability—Taking the Practice of Liulishuo in North China Electric Power University (Baoding) as an Example

Yang¹,

Yang²,

Xu³

2019

IES

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“…[2]. This gave a good description of the width spectrum, and also of the pion helicity angle distribution [3,4].…”

Section: Introductionmentioning

confidence: 85%

Novel implementation of the multipole expansion to quarkonium hadronic transitions

Pineda

Castellà

2019

Phys. Rev. D

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We compute hadronic transitions between heavy quarkonium states with two, or one, pion/eta particles in the final state. We use the multipole expansion but not the twist expansion. The latter cannot be justified for the energy release of hadronic transitions between heavy quarkonium states with different principal quantum numbers. Instead, we use a counting based on the dimension of the interpolating field of the hybrid. This alternative counting allows us to still use chiral low-energy theorems to compute the pion production by local gluonic operators. We explore the phenomenological impact of this counting. Remarkably enough, for the two-pion transitions, we obtain the same predictions for the normalized differential decay rate as those obtained assuming the twist expansion. We implement this computational scheme using the hadronic representation of the effective theory potential NRQCD. We assume that the inverse Bohr radius of the heavy quarkonium is much larger than Λ QCD but do not impose any constraint on the relative size of Λ QCD and the typical kinetic energy of the bound state.

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“…It is noted that the D wave component exists in the g 2 term [10,12]. Under Lorentz transformation, p 0 1 and p 0 2 can be expressed as the functions of the momenta of pions in the center of mass (c.m.)…”

Section: Brief Formalismmentioning

confidence: 99%

“…It seems unnatural. Moreover, M.-L. Yan et al [12] pointed out that the parametrization of the S-wave FSI there was not properly carried out because in the g 2 term in the amplitude, there are also D wave components. In Ref.…”

Section: Introductionmentioning

confidence: 99%

HEAVY QUARKONIUM π⁺π^- TRANSITIONS AND A POSSIBLE $b\bar{b}q\bar{q}$ STATE

Guo

Shen

Chiang

et al. 2005

Int. J. Mod. Phys. A

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π + π − transitions of heavy quarkonia, especially the Υ(3S) → Υ(1S)π + π − decay process, are revisited. In the framework of the Chiral Unitary Theory (ChUT), the S wave ππ final state interaction (FSI) is included. It is found that when an additional intermediate state with J P = 1 + and I = 1 is introduced, not only the ππ invariant mass spectrum and the cosθ * π distribution in the Υ(3S) → Υ(1S)π + π − process can simultaneously be well-explained, but also a consistent description for other bottomonia π + π − transitions can be obtained.As a consequence, the mass and the width of the intermediate state are predicted.From the quark content analysis, this state should be a bbqq state.

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Comment on the hadronic decay of excited heavy quarkonia

Cited by 3 publications

References 3 publications

The Efficacy of Using Liulishuo for Spoken English Ability—Taking the Practice of Liulishuo in North China Electric Power University (Baoding) as an Example

The Efficacy of Using Liulishuo for Spoken English Ability—Taking the Practice of Liulishuo in North China Electric Power University (Baoding) as an Example

Novel implementation of the multipole expansion to quarkonium hadronic transitions

HEAVY QUARKONIUM π⁺π^- TRANSITIONS AND A POSSIBLE $b\bar{b}q\bar{q}$ STATE

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Comment on the hadronic decay of excited heavy quarkonia

Cited by 3 publications

References 3 publications

The Efficacy of Using Liulishuo for Spoken English Ability—Taking the Practice of Liulishuo in North China Electric Power University (Baoding) as an Example

The Efficacy of Using Liulishuo for Spoken English Ability—Taking the Practice of Liulishuo in North China Electric Power University (Baoding) as an Example

Novel implementation of the multipole expansion to quarkonium hadronic transitions

HEAVY QUARKONIUM π+π- TRANSITIONS AND A POSSIBLE $b\bar{b}q\bar{q}$ STATE

Contact Info

Product

Resources

About

HEAVY QUARKONIUM π⁺π^- TRANSITIONS AND A POSSIBLE $b\bar{b}q\bar{q}$ STATE