1. The hidden-color component in d* dibaryon?
Jialun Ping, Hongxia Huang
Nanjing Normal University
Fan Wang
Nanjing University
2015强子物理与核物理前沿研讨会, 北京 ,11

2. Contents Motivation Physics basis and symmetry basis
Hidden-color channel
Numerical results
Summary
2015强子物理与核物理前沿研讨会, 北京 ,11

3. Motivation WASA-at-COSY experiments: “d* (IJP=03+) ”
PRL 102, (2009); M=2.36 GeV, Γ=80 MeV
PRL 106, (2011); M=2.37 GeV, Γ=70 MeV IJP=03+
PLB 721, 229 (2013); M=2.37 GeV, Γ=70 MeV
PRC 88, (2013); M=2.37 GeV, Γ=70 MeV
PRL 112, (2014); M=2.3800.010 GeV, Γ=405 MeV
2015强子物理与核物理前沿研讨会, 北京 ,11

4. narrow width Bashkanov-Brodsky-Clement: PLB 727(2013)438
2015强子物理与核物理前沿研讨会, 北京 ,11

5. Huang-Zhang-Shen-Wang: arXiv:1408.0458 CC channel: 66%--68%  70 MeV
Huang-Ping-Wang: PRC89(2014)034001
(rms: 1.2—1.3fm)
Juan-Diaz,T.S.H. Lee,
Matsuyama, Sato:
PRC76(2007)065201
2015强子物理与核物理前沿研讨会, 北京 ,11

6. Physical basis and symmetry basis
M. Harvey: NPA352(1981)301: SU(2)
J.Q. Chen: NPA393(1983)122
F.Wang, J.L.Ping, T. Goldman: PRC51(1995)1648: SU(3)
Physical basis:
Symmetry basis:
2015强子物理与核物理前沿研讨会, 北京 ,11

7. 2015强子物理与核物理前沿研讨会, 北京 ,11

8. hidden-color channel d* compact object -----
taking limit: six quarks in one bag
2015强子物理与核物理前沿研讨会, 北京 ,11

9. 6 quarks are in the same orbit: []=[6], [42] disappears
Symmetry basis: only [6][33][33] exists
------> number of physical basis: 1
 and CC are the same !
<  | CC > =1
2015强子物理与核物理前沿研讨会, 北京 ,11

10. numerical results Calculation method: RGM+GCM
2015强子物理与核物理前沿研讨会, 北京 ,11

11. +S/2, -S/2: the reference centers of baryons
S0, [6] exists, [42] disappears
<  | CC > =1
Continuity  <  | CC > approx. 1, when S is small.
S (fm) <  | CC > S (fm) <  | CC > x
~ 1
2015强子物理与核物理前沿研讨会, 北京 ,11

12. S (fm) <  |H|  > < CC |H|CC > <  | CC >
Matrix elements:
S (fm) <  |H|  > < CC |H|CC > <  | CC > ~0
2015强子物理与核物理前沿研讨会, 北京 ,11

13. d* in chiral quark model (two channels:  and CC)
S(fm)
E(MeV)
 (%)
CC(%)
Physical basis and symmetry basis: same results
2015强子物理与核物理前沿研讨会, 北京 ,11

14. Summary
For compact object, the color-singlet channel has a large overlap with hidden-color channel.
To explain the narrow width by using hidden-color channel is questionable.
How to calculate the decay width of bounded  is crucial for the explanation of the narrow width of d*.
The experimental searching of D30 is helpful to understand the structure of d*.
Thanks!!!
2015强子物理与核物理前沿研讨会, 北京 ,11