Resonance Multiplets in the Two
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Transcript Resonance Multiplets in the Two
Fachbereich Physik
CERN Courier September
2011
BLINDBILD
Resonance Multiplets in the Two-Baryon
System --- Dibaryons Revisited
MesonNet Meeting
Prague, June 17 - 19, 2013
Heinz Clement
Two-Baryon Scenario
Known knowns:
I (JP) = 0 (1+)
I (JP) = 1 (0+)
Are there six-quark bags (genuine dibaryons)?
Are there in general resonant states (molecular, dynamic) at all?
Recent experimental findings:
deuteron groundstate:
1S virtual state (NN FSI):
0
1
Known unknowns:
3S
resonance near the DN threshold:
ABC resonance structure much below the DD threshold:
1D
2
I (JP) = 1 (2+)
I (JP) = 0 (3+)
Are there more states?
Model predictions
Dyson‘s multiplet
H. Clement
Resonances in the Two-Baryon System
2
The
1D
2
Resonance
Best seen in pp dp+,
but also in pp pnp+ as well as pp and p+d scattering (phaseshift analyses)
stot (p+d pp)
Argand plot
R.A. Arndt et al., PRC 48 (1993) 1926
50 (1994) 1796
56 (1997) 635
N. Hoshizaki, PRC 45 (1992) R1424
Prog. Theor. Phys. 89 (1993) 245
251
563
569
I (JP) = 1 (2+)
M = 2144 MeV = mD + mN – 26 MeV
G = 110 MeV GD
Alternative dynamic description: Diss. C.A. Mosbacher, Bonn 1998
H. Clement
Resonances in the Two-Baryon System
3
The ABC Resonance I (JP) = 0 (3+)
M 2370 MeV
2mD – 90 MeV
Gresonance”
70 MeV
“ABC
≤ 1/3 GDD
Gintr50 MeV
See talk
M. Bashkanov
Phys.Rev.Lett.106, 242302 (2011)
H. Clement
Resonances in the Two-Baryon System
4
pn R DD dp0p0
p
model
n
Δ
π
π
Δ
I (JP) = 0 (3+)
Mdp0
M, G, Gi * Gf , F(qDD)
Phys.Rev.Lett.106, 242302 (2011)
Mpp
ABC effect
H. Clement
Resonances in the Two-Baryon System
Qd*
5
d
s(pN d p p )
I=0+1
I=
I=0
1
s(pn d p+p-)
2 s(pn d p0p0)
½ s(pp d p+p0)
COSY Annual Report 2012
Phys. Lett. B721 (2013) 229
H. Clement
Resonances in the Two-Baryon System
6
Status of the ABC Resonance
See talk
M. Bashkanov
decay channel
branching
status
-----------------------------------------------------------------------d p0p0
15 %
observed
d p+p25 %
observed
ppp0p7%
observed
npp0p0
(12 %, predicted*) data analysis WASA
npp+p(31 %, predicted*) data analysis HADES
np
(10 %, predicted) data analysis WASA
first results very
encouraging!
* Fäldt & Wilkin, PLB 701 (2011) 619
Albaladejo & Oset, arXiv:1304.7698 [nucl-theor]
H. Clement
Resonances in the Two-Baryon System
8
Comparison to predictions from
Quark Models
Experiment
E
Bag Model
QDCSM
ChQM
SU(6)
Dyson
Mulders et al.
Goldman, Ping et al.
Huang, Shen et al.
PRD 21 (1980) 2653
PRC 79 (2009) 024001
Mod.Phys.Lett.A25(2010)2155
PRL 13 (1964) 815
…
…
DD
3+
NN
1+ 0+
……
DN
2+
I= 0 1
H. Clement
0 1
0 1
Resonances in the Two-Baryon System
0 1
0 1
9
… inevitable dibaryon: unique symmetry!
H. Clement
Resonances in the Two-Baryon System
10
… inevitable dibaryon
I(JP) = 0(3+) state: totally symmetric in space, spin & color
antisymmetric in isospin
accessed via DD as doorway ?
N
N
DD
Np
H. Clement
d*
Np
Resonances in the Two-Baryon System
11
Dyson‘s Multiplet Prediction
H. Clement
Resonances in the Two-Baryon System
12
Dyson‘s Prediction
State
I
J
Asymptotic Configuration
mtheor [MeV]
mexp [MeV]
Gexp [MeV]
--------------------------------------------------------------------------------------------------------------------------------D01
0
1
Deuteron
1876
1876
D10
1
0
virtual 1S0
1876
1878
D12
1
2
2160
2144
D21
2
1
D03
0
3
D30
3
0
NN(1D2) DN NNp
DN NNp
NN(3D3) DD NNpp
DD NNpp
2160
2350
?
2370
2350
?
110
?
70
?
----------------------------------------------------------------------------------------------------------------------------- ----
H. Clement
Resonances in the Two-Baryon System
13
Dyson‘s Prediction
State
I
J
Asymptotic Configuration
mtheor [MeV]
mexp [MeV]
Gexp [MeV]
--------------------------------------------------------------------------------------------------------------------------------D01
0
1
Deuteron
1876
1876
D10
1
0
virtual 1S0
1876
1878
D12
1
2
2160
2144
D21
2
1
D03
0
3
D30
3
0
NN(1D2) DN NNp
DN NNp
NN(3D3) DD NNpp
DD NNpp
2160
2350
?
2370
2350
?
110
?
70
?
----------------------------------------------------------------------------------------------------------------------------- ----
H. Clement
Resonances in the Two-Baryon System
14
A hint for D21
P
I(J )
=
+
2(1 )
?
Pionic Double Charge Exchange in Nuclei:
non-analog transitions:
intermediate system:
(DN)I=2, JP=1+
M 2150 MeV
G 90 MeV
A. Wirzba et al., PRC 40 (1989) 2745
M.B. Johnson, L.S. Kisslinger, PLB 168 (1986) 26
J. Draeger et al., PRC 62 (2000) 064615
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Resonances in the Two-Baryon System
15
Conclusions
Non-Strange Two-Baryon Spectrum
3 established states: 3S1 deuteron groundstate
1S virtual state
0
1D resonance (DN)
2
1 new - possibly exotic - candidate:
ABC resonance (DD)
Are there more states?
E
NN-decoupled states with I = 2, 3?
Search in pp ppp+ pand in pp ppp+p+ p-p-
Dyson‘s
prediction
DD
0+
3+
DN
2+
NN
1+ 0+
1+
I= 0 1 2 3
H. Clement
Resonances in the Two-Baryon System
16
Comparison to predictions from
Quark Models
Experiment
E
Bag Model
QDCSM
ChQM
SU(6)
Dyson
Mulders et al.
Goldman, Ping et al.
Huang, Shen et al.
PRD 21 (1980) 2653
PRC 79 (2009) 024001
Mod.Phys.Lett.A25(2010)2155
PRL 13 (1964) 815
…
DD
3+
NN
1+ 0+
…
DN
2+
I= 0 1
H. Clement
0 1
0 1
Resonances in the Two-Baryon System
0 1
0 1
17