Theoretical study of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>d</mml:mi><mml:mo>*</mml:mo></mml:msup><mml:mrow><mml:mo>(</mml:mo><mml:mn>2380</mml:mn><mml:mo>)</mml:mo></mml:mrow><mml:mo>→</mml:mo><mml:mi>d</mml:mi><mml:mi>π</mml:mi><mml:mi>π</mml:mi></mml:mrow></mml:math>decay width

Dong, Yubing; Shen, Peng-Nian; Huang, Fei; Zhang, Z. Y.

doi:10.1103/physrevc.91.064002

Cited by 55 publications

(54 citation statements)

References 29 publications

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“…This is in accordance with meanwhile numerous theoretical work about this resonance [29][30][31][32][33][34][35][36][37][38][39]. It also is in agreement with the measured branchings of the d * decay into the diverse N N ππ channels [40].…”

Section: Hypotheses For Its Explanationsupporting

confidence: 78%

Examination of the nature of the ABC effect

2017

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Recently it has been shown by exclusive and kinematically complete experiments that the appearance of a narrow resonance structure in double-pionic fusion reactions is strictly correlated with the appearance of the so-called ABC effect, which denotes a pronounced low-mass enhancement in the ππ-invariant mass spectrum. Whereas the resonance structure got its explanation by the d * (2380) dibaryonic resonance, a satisfactory explanation for the ABC effect is still pending. In this paper we discuss possible explanations of the ABC effect and their consequences for the internal structure of the d * dibaryon. To this end we examine and review a variety of proposed explanations for the ABC effect, add a new hypothesis and confront all of them with the experimental results for the np → dπ 0 π 0 and np → npπ 0 π 0 reactions, which are the most challenging ones for this topic.

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Section: Hypotheses For Its Explanationsupporting

confidence: 78%

Examination of the nature of the ABC effect

2017

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“…It provides a chance to naturally explain that d * , although located above the thresholds of the ΔNπ and NNππ channels, has a relatively narrow width since its dominated CC components cannot be subject to a direct break-up decay. A detailed calculation of the partial decay widths of d * → dπ + π − and d * → dπ 0 π 0 [31] will be present in the next section, where we will see that apart from the mass, the picture we proposed here for d * also results in a good agreement of the decay width compared with the data reported by WASA-at-COSY Collaboration.…”

Section: Energy and Structure Of D *supporting

confidence: 64%

“…This Hamiltonian density gives the qqπ vertex as shown in Figure 2. Further by using the relative wave functions for ΔΔ in d * and NN in d, the transition amplitude M f i of the decay process d * → dππ can be obtained straightforwardly [31], and the partial decay width of this reaction can then be evaluated by…”

Section: Decay Width Of D *mentioning

confidence: 99%

Understanding the structure of d*(2380) in chiral quark model

Huang

Shen

Dong

et al. 2016

Sci. China Phys. Mech. Astron.

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The structure and decay properties of d * have been detailedly investigated in both the chiral SU(3) quark model and the extended chiral SU(3) quark model that describe the energies of baryon ground states and the nucleon-nucleon (NN) scattering data satisfactorily. By performing a dynamical coupled-channels study of the system of ΔΔ and hidden-color channel (CC) with quantum numbers I(J P ) = 0(3 + ) in the framework of the resonating group method (RGM), we find that the d * has a mass of about 2.38-2.42 GeV and a root-mean-square radius (RMS) of about 0.76-0.88 fm. The channel wave function is extracted by a projection of the RGM wave function onto the physical basis, and the fraction of CC component in the d * is found to be about 66%-68%, which indicates that the d * is a hexaquark-dominated exotic state. Based on this scenario the partial decay widths of d * → dπ 0 π 0 and d * → dπ + π − are further explicitly evaluated and the total width is then obtained by use of the branching ratios extracted from the measured cross sections of other possible decay channels. Both the mass and the decay width of d * calculated in this work are compatible with the data (M ≈ 2380 MeV, Γ ≈ 70 MeV) reported by WASA-at-COSY Collaboration. hexaquark state, d * (2380), quark model, hidden-color channel PACS number(s): 14.20.Pt, 13.75.Cs, 12.39.Jh, 13.30.Eg Citation:

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“…Consequently, the electromagnetic form factors might also be discriminating quantities for studying the inner structure of the higher spin particle. In particular, for the d Ã state, if there is a considerably large hidden color component (HCC) in it, we found that, although such a component does not contribute to its hadronic strong decay in the leading-order calculation, it can play a rather important role in the charge distribution calculation [12][13][14]39]. The resultant charge distribution of d Ã with a compact 6-quark structure is quite different from that having a D 12 π (or ΔπN) structure [39].…”

Section: Introductionmentioning

confidence: 99%

Form factors of the d*(2380) resonance

2018

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In order to explore the possible physical quantities for judging different structures of the newly observed resonance d Ã ð2380Þ, we study its electromagnetic form factors. In addition to the electric charge monopole C0, we calculate its electric quadrupole E2, magnetic dipole M1, and magnetic octupole M3 form factors on the base of the realistic coupled ΔΔ þ C 8 C 8 channel dÃ wave function with both the S-and D-partial waves. The results show that the magnetic dipole moment and electric quadrupole deformation of d Ã are 7.602 and 2.53 × 10 −2 fm 2 , respectively. The calculated magnetic dipole moment in the naive constituent quark model is also compared with the result of D 12 π picture. By comparing with partial results where the d Ã state is considered with a single ΔΔ and with a D 12 π structures, we find that in addition to the charge distribution of d Ã , the magnetic dipole moment and magnetic radius can be used to discriminate different structures of d Ã . Moreover, a quite small electric quadrupole deformation indicates that d Ã is more inclined to a slightly oblate shape due to our compact hexaquark dominated structure of d Ã .

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Theoretical study of thed*(2380)→dππdecay width

Cited by 55 publications

References 29 publications

Examination of the nature of the ABC effect

Examination of the nature of the ABC effect

Understanding the structure of d*(2380) in chiral quark model

Form factors of the d*(2380) resonance

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