Is d<SUP>*</SUP> a candidate for a hexaquark-dominated exotic state?

HUANG Fei; ZHANG Zong-Ye; SHEN Peng-Nian; WANG Wen-Ling

doi:10.1088/1674-1137/39/7/071001

Chinese Physics C> 2015, Vol. 39> Issue(7) : 071001 DOI: 10.1088/1674-1137/39/7/071001

Is d^* a candidate for a hexaquark-dominated exotic state?

Abstract
HTML
Reference
Related

PDF

Abstract：
We confirm our previous prediction of a d* state with I(JP)=0(3+) [Phys. Rev. C 60, 045203 (1999)] and report for the first time based on a microscopic calculation that d* has about 2/3 hidden color (CC) configurations and thus is a hexaquark-dominated exotic state. By performing a more elaborate dynamical coupled-channels investigation of the ΔΔ-CC system within the framework of the resonating group method (RGM) in a chiral quark model, we find that the d* state has a mass of about 2.38--2.42 GeV, a root-mean-square radius (RMS) of 0.76--0.88 fm, and a CC fraction of 66%--68%. The last may cause a rather narrow width for the d* which, together with the quantum numbers and our calculated mass, is consistent with the newly observed resonance-like structure (M≈ 2380 MeV, Γ≈ 70 MeV) in double-pionic fusion reactions reported by the WASA-at-COSY Collaboration.

References

[1]

Booth N E et al. Phys. Rev. Lett., 1961, 7: 35[2] Bashkanov M et al. Phys. Rev. Lett., 2009, 102: 052301[3] Adlarson P et al. (WASA-at-COSY collaboration). Phys. Rev. Lett., 2011, 106: 242302[4] Adlarson P et al. (WASA-at-COSY collaboration SAID DAC). Phys. Rev. Lett., 2014, 112: 202301[5] Adlarson P et al. (WASA-at-COSY collaboration SAID DAC). Phys. Rev. C, 2014, 90: 035204[6] Adlarson P et al. (WASA-at-COSY collaboration). arXiv:1409.2659 [nucl-ex][7] Dyson F J, Xuong N H. Phys. Rev. Lett., 1964, 13: 815[8] Oka M, Yazaki K. Phys. Lett. B, 1980, 90: 41[9] ZHANG Z Y et al. Nucl. Phys. A, 1997, 625: 59[10] YUAN X Q et al. Phys. Rev. C, 1999, 60: 045203[11] LI Q B et al. Nucl. Phys. A, 2001, 683: 487[12] DAI L R et al. Nucl. Phys. A, 2003, 727: 321[13] Kusainov A M et al. Phys. Rev. C, 1991, 44: 2343[14] Glozman L Y, Neudatchin V G, Obukhovsky I T. Phys. Rev. C, 1993, 48: 389[15] Stancu F, Pepin S, Glozman L Y. Phys. Rev. C, 1997, 56: 2779[16] Bashkanov M, Brodsky S J, Clement H. Phys. Lett. B, 2013, 727: 438[17] HUANG H X et al. Phys. Rev. C, 2014, 89: 034001[18] Gal A et al. Phys. Rev. Lett., 2013, 111: 172301

Access

Get Citation

HUANG Fei, ZHANG Zong-Ye, SHEN Peng-Nian and WANG Wen-Ling. Is d^* a candidate for a hexaquark-dominated exotic state?[J]. Chinese Physics C, 2015, 39(7): 071001. doi: 10.1088/1674-1137/39/7/071001

HUANG Fei, ZHANG Zong-Ye, SHEN Peng-Nian and WANG Wen-Ling. Is d^* a candidate for a hexaquark-dominated exotic state?[J]. Chinese Physics C, 2015, 39(7): 071001. doi: 10.1088/1674-1137/39/7/071001 shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 2015-03-23
Revised: 1900-01-01

Article Metric

Article Views(2716)
PDF Downloads(242)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Is d^* a candidate for a hexaquark-dominated exotic state?

Received Date: 2015-03-23
Accepted Date: 1900-01-01
Available Online: 2015-07-05

Abstract: We confirm our previous prediction of a d* state with I(JP)=0(3+) [Phys. Rev. C 60, 045203 (1999)] and report for the first time based on a microscopic calculation that d* has about 2/3 hidden color (CC) configurations and thus is a hexaquark-dominated exotic state. By performing a more elaborate dynamical coupled-channels investigation of the ΔΔ-CC system within the framework of the resonating group method (RGM) in a chiral quark model, we find that the d* state has a mass of about 2.38--2.42 GeV, a root-mean-square radius (RMS) of 0.76--0.88 fm, and a CC fraction of 66%--68%. The last may cause a rather narrow width for the d* which, together with the quantum numbers and our calculated mass, is consistent with the newly observed resonance-like structure (M≈ 2380 MeV, Γ≈ 70 MeV) in double-pionic fusion reactions reported by the WASA-at-COSY Collaboration.