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Su Houng Lee 1. L from pp at ALICE and H dibaryon 2. Exotics from HIC 3. Crypto-exotics from HIC
Few ideas on Hadronic Physics at RHIC/LHC
Acknowledgement: S. Cho, C.M. Ko, S. Yasui + ExHIC collabora-tion
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L from p-p ALICE and the H dibaryon
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L L measurement at KEK ( 안정근 E224, E522)
A continued search for H-dibaryon (K. Imai …)
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H –dibaryon Jaffe 77
u d 0+
) Oka (M. repulsion Instanton MeV 29Binding H
u s
H di-baryon could be bound
unfortunately not found in so far
d s
u d
s
u d
s
H di-baryon
CFL
2SC Phase
Phase of color superconductivity ?sd
B
su
B
u
Bqq mm
CmmC
mCV
43
43
43
2
22 43
43
u
B
u
Bqq m
CmCV
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Expectations for H and LL production in Pb Pb collision at LHC
Npart Pb+Pb: X 100More than 100 H dibaryon
Stat : H/ L = 10 -2
H
p p
L
p
p
L
L
If mH < 2 m L If mH > 2 m LCan be the first observation of real exotic and solution to a 30 year quest
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Exotics from HIC
SHL, S. Yasui : EPJC 64 283 (09)
SHL, S. Yasui, W. Liu, CM.Ko : EPJC 54 259 (08)
S. Cho et al. arXiv:1011.0852
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Babar: DSJ(2317) 0+ Puzzle in Constituent Quark Model(2400)
1. D0 K+ (2358) threshold effect
2. Chiral partner of (0- 1-)
3. Tetraquark
X(3872) , Y(4260), Z(4430) y’p Z(4051),Z(4248) cc1p
Must contain cc ?
Molecule ?
Recent Highlights in Hadron Physics – Heavy quark sector
D0 D* D11864 2007 2420
D0+D* D*+D* D+D1 D1+D*3871 4014 4284 4427
Tetraquark ?
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Scalar tetraquark (Jaffe 76)
Search for H dibaryon Search for Q+ pentaquark
Previous Work on Multiquark hadrons - Light quark sector
L(1405) (Weise, Oset, Jido, Sekihara..)
N K S p+Crypto-exotic : difficult to prove
Exotic : Not found so far
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Multiquark configuration:
Diquark attracation vs quark-antiquark
2121
1mm
ssCV Bqq
q3q1
q2
diquark picture: Yasui, Ko, Liu, Lee,.. (EJP08,EJP09)
Type of diquark and its q-q binding S=C=0 (ud) A S=-1, ms=5/3mu (us) 3/5 A (ds) 3/5 AC=1, mc=5mu (uc) 1/5 A (dc) 1/5 A (sc) 3/25 A
MeV 14543A 2
u
B
mC
3131
1mm
ssCV Mqq
BM CC 3
23 3 make mm
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Exotics 1: Tetra-quark - configurations
u d d u u dd u0+
boundnot since
BM CC
0- 0-
222 43
43
u
B
u
Bqq m
CmCV 22 4
3 432
u
M
u
Mqq m
CmCV
u d c b u dc b0+
MeV -21.25T of Binding 0
cb
0- 0-
bc
B
u
B
mmC
mC
43
43
2 bu
M
cu
M
mmC
mmC
43
43
2- light quark 2-light anitquark configuration
Scalar - Tetraquark p Meson p Meson
2- light quark 2-heavy anitquark configuration
Tcb0/D > O(10 -5 ) at LHC
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1+ u d c c u dc c 0- 1-
22 41
43
c
B
u
B
mC
mC
cu
M
cu
M
mmC
mmC
41
43
Tcc/D > O(10 -4 ) at LHC
MeV 79.3T of Binding 1
cc
pKDDD *0*1cc )( )cc(udT
Axial meson Tcc 2- light quark 2-heavy anitquark
Vertex detector: FAIR 104 D0 /month, LHC 105 D0/month
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Why Di-bayron
u d 0+
) Oka (M. repulsion Instanton MeV 29Binding H
u s
H di-baryon could be bound unfortunately not found in so far
d s
u d
s
u d
s
H di-baryon
su
B
u
B
mmC
mC
432
43
2
22 43
43
u
B
u
B
mC
mC
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A new Di-baryon : Hc
u d
0+
MeV 92 H of Binding c
u s
u c
u d
u
u
c
s
Hc di-baryon P Xc
cu
B
su
B
u
Bqq mm
CmmC
mCV
43
43
43
2
su
B
u
Bqq mm
CmCV
43
43
2
LX
SL
pp
pp
Kpp
ppK
c
c
)(
)( (udusuc)H 0c
Hc/D > O(10 -3 ) at LHC
Vertex detector: FAIR 104 D0 /month, LHC 105 D0/month
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Crypto Exotics from HIC (Multiquark configurations )
S. Cho (ExHIC collaboration) arXiv:1011.0852
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Normal meson
Tetraquark Molecule
Geometri-cal config-
uration
Flavor quantum number
ud ud ud
u uudu
d
uu
ud
Normal meson, Tetraquark and Molecule
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Freezeout points
Normal hadron yields
Statistical Model
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Suppression of p-wave resonance (Muller and Kadana En’yo) 1
)/)1520(()/)1520((
*
*
LL
LL
pp
AuAu
Coalescence model = Statistical model + overlap
Quark number scaling of v2 PT dependence of ratio v4
Ko et al
Ko et al
Ko et al
Success of Coalescence modelCoalescence model : for things with structures
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Production of multiquark states from HIC arXiv:1011.0852
1. Determine Coalescence parameter to yields of normal hadrons
at RHIC2. Using the coalescence model, calculate the yields of multiquark
candidates assuming they are normal hadron, multiquark, molecule
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Fachini [STAR]
S. Cho
0.2 x Stat
5 x Stat
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Expectations at RHIC and LHC
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u dd
u d
u
us
ds
c
c
d
u
d
u
us
d
s
cdud
u
c
u d
Pentaquark produc-tion through 5-body coalescence
Tetraquark produc-tion through 4-body coalescence
c
c
cu
D meson produc-tion through 2-body coalescence
d ud
ud
cu
d
d
c
u
Suppression of multi-quark states in HIC
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1. One can search for H dibaryon from pp at LHC in ALICE and later from Pb Pb collisions end the 30 year old search.
2. One could also search for exotic multiquark states: Tcc, Hc, Qc First step towards dense matter and phase diagram of QCD
Summary
3. By measuring yields for crypto- exotic states one can identify multiquark configuration
finally identify multiquark configuration
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Back up slides
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Collision system √sNN(TeV) L0 (cm-2s-1) Run time (s/year)
sgeom (b)
pp 14.0 1034 * 107 0.07PbPb 5.5 1027 106 ** 7.7
pPb 8.8 1029 106 1.9ArAr 6.3 1029 106 2.7
Running conditions at LHC
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Belle: PRL 98, 082001 (07)
e+ e- J/y + X(3904)
D D*
e+
e
c
c
SHL, S Yasui, W Liu, C Ko (08)
Can look for 1+ (Tcc)
Previous works on Tcc : Z. Zouzou, B. Silverstre-Brac, C. Gilgnooux, J Richard (86), D. Janc, M. Rosina (04), Y. Cui,
S. L. Zhu (07)QCD sum rules: F Navarra, M. Nielsen, SHLee, PLB 649, 166 (2007) simple diquark: SHL, S. Yasui, W.Liu, C Ko EPJ C54, 259 (2008), SHL, S. Yasui: EPJ C (09)
c
c
X
(3904) Tcc (3800)
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Tcc/D > 0.34 x 10 -4 RHIC > 0.8 x 10 -4 LHC
Hc/D > 0.8 x 10 -4 Hc/Ds > 0.25 x 10 -3
LX
SL
pp
pp
Kpp
ppK
c
c
)(
)( (udusuc)H 0c
Production ratios for predicted Multiquarks
Qc/D > 0.74 x 10 -4 Qc/Ds > 0.23 x 10 -3
Qc production at RHIC and LHC
Hc production at RHIC and LHC
Tcc production
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Ncoal/Nstat
Recent data from RHIC