1. BELLE Results on Heavy Spectroscopy
V.Balagura, ITEP
10 Apr, Frascati
PHI PSI 08
1. Charged charmonium-like state Z(4430)+
2. Results on DsJ mesons
3. Search for states produced together with J/y: e+e-→ X(3940, 4160) J/y
and decaying to D(*)D(*)
4. Search for 1-- resonances decaying to y(1,2S)p+p- via e+e-→ gISR [y(1,2S)p+p-]
5. First observation of signals similar to Y(4260) in the bottomonium sector:
surprisingly large U(1S,2S)p+p- (and evidence of  U(3S)p+p-, U(1S)K+K-)
transitions near the U(5S) resonance
6. Conclusions

2. Summer 2007, Belle-CONF-0711: first observation of B0→K0SX(3872)
Results which will not be covered in this talk
Exp
M, MeV
G, MeV
JPC
Production
Decay
X(3872)
Belle, CDF, D0, CLEO, BaBar
3871.4±0.6
<2.3
1++, 2-+
from B, pp
p+p-J/y, p+p-p0 J/y, gJ/y
Belle,
BaBar
3875.4± ±0.9
±0.5
±0.9 B
D0D0p0
Z(3930)
Belle
3929±5±2
29±10±2
2++ gg
D0D0, D+D-
Y(3940)
3943±11±13
±1.9
87 ±22 ±26 ±5
J++
wJ/y
B0→K0SX(3872)
B+→K+X(3872)
Summer 2007, Belle-CONF-0711: first observation of B0→K0SX(3872)
DM=0.22±0.90±0.27 MeV (tetraquark: DM=(8±3) MeV, PRD71, ),
B(B0) / B(B+) = 0.94±0.24± (contradicts to PRD71, : <0.1)
6.5s

3. B→ Z(4430)+ K → y(2S) p+ K: charged state → not cc!
K*(890) K*(1430)
J/ +-, +-, e+e-
PRL100, , arXiv: , 605 fb-1
M(y’p+), GeV
S-wave D*D1(2420) thresh. effect PRD76,114002
[cu][cd] tetraquark hep-ph/
D*D1(2420) molecule , ,
M2(y’p+), GeV2
veto
veto
M2(K-/K0S p+), GeV2
non-B bgr. from DE sidebands
veto
veto
S-wave BW + ph. space-like bgr:
121±30 ev., 6.5s significance
M = 4433±4±2 MeV
G = MeV → narrow
→ cannot be explained by interf. in Kp channel
Kp mass from ±30 MeV Z(4433)+ window

4. B+→ DsJ (2700)+ D0 → D0K+D0: new cs state
PRL 100, , 414 fb-1
y(3770)
68±15ev., 5.5s
M=3776±5±4 MeV
G=27±10±5 MeV
B=(2.2±0.5±0.3)∙10-4 q D0 K+
DsJ
DsJ(2700)+
182±30ev., 8.4s
M=2708± MeV
G=108± MeV
B=(11.3± )∙10-4
23S1, e.g. PLB
Chiral doublet state to Ds1(2536), hep-ph/ JP 0-
1- (preferred) 2-
c2/ndf
112/5
11/5
146/5

5. PWA of Ds1(2536)+→D*+K0S: Ds1(2460)-Ds1(2536) mixing
PR D , 462 fb-1
HQET: D (S)-wave for j=L+Ss=3/2 (1/2)
HQET not exact: Ds1(2536)+ contains small admixture of j=1/2
Energy release is small → D-wave is suppressed
→ S wave due to j=1/2 can be visible
Ds1(2536)+ from e+e- continuum
xP>0.8
5673±81 ev. almost no bgr.!
Ds1(2536)+ is slightly polarized in e+e- → Ds1(2536)+X
3D angular fit (a,b,g)
to helicity formalism formula:
gives complex ratio of amplitudes and polarization
projections
S-wave dominates
for xp>0.8
c2 corresponds to prob. 60%

6. J/y reconstr. instead of D(*) Bgr. (histograms) – from D(*) sidebands
C=+1 states: e+e- →X(3940, 4160) J/y → D*D(*) J/y
arXiv: , 693 fb-1
Surprisingly large double charmonium production, hc, cc0, hc(2S), X(3940) observed in recoil to J/y
not enough stat. D D*
D*D* reflect.
J/y
Unreconstr. recoil = D or D* e+
e -
D0, D+ or D*+→D0p+
hc(3S)?
X(3940) update
(5±3)ev s
s M= ±6 MeV G= ±8 MeV
J/y reconstr. instead of D(*) D D*
ev s
M= ±15 MeV
G= ±21 MeV
New state X(4160)
cc0(3P)? hc(4S)?
Bgr. (histograms) – from D(*) sidebands

7. Search for 1-- states: e+e- →gISRY(4260) → gISR J/y p+ p-
PRL 99, , 548 fb-1
BaBar observation
125±23 ev. M=4259± 8± G=88± s 2 6
Y(4260)
y’ for calibration
New structure M=4008
No enhancement in D(*) D(*): PRL 98, ?
PRL 95, , 233 fb-1 MC
theor. review: PR 429, 243
11s
Cleo confirmation
5.1s
√s=4.26 GeV
3.7s
PRL 96, , 13.2 pb-1
√s≈10GeV using gISR
5.4s
MeV
MeV
PR D74, (R), 13.3 fb-1 eV
MeV
MeV
BES e+e- →hadrons: B(Y→ J/yp+p-) > 90% CL eV
2 solutions with con/di-structive interf.
PRL 84, 594; 88,

8. Search for 1-- states in e+e- →gISR y(2S) p+ p-
PRL 99, , 673 fb-1
BaBar observation
Y(4260)-can not be ruled out
New structure M=4660, 5.8s
BaBar’s peak, 8s
new res.?
M=4324± 24 G=172±33
PRL 98, , 298 fb-1
Two y(2S)p+p- structures are distinct from J/yp+p- ones
MeV
MeV
43S1, 53S1, 33D1, exotics ? eV
MeV
MeV eV
Two solutions with con/di-structive interf.

9. Is there a corresponding bb state Ub → U(1S) p+ p- ?
Search for Y(4260) analogue in the bottomonium sector
Y(4260) → J/y p+ p-
Is there a corresponding bb state Ub → U(1S) p+ p- ?
“Searching for the bottom counterparts of X(3872) and Y(4260) via p+p-U”, Wei-Shu Hou, PR D74, (2006) → measure p+p-U(1S) cross section
Resonance structure is rather complicated above BB threshold.
E.g. Y(10860) is commonly assumed to be a bottomonium Y(5S) state, but we do not really know that.
World wide Y(10860) data:
1985 CLEO /fb
2003 CLEO III /fb
2005 Belle /fb
2006 Belle /fb
Total cross-section
Collected mainly for Bs physics, ≈105 Bs / fb
Use it to measure p+p-U(1,2,3S) cross section at U(10860) and below via ISR

10. Anomalous U(1,2,3S) p+p-, U(1S) K+K- cross sections at U(5S)
PRL 100, , 21.7 fb-1
Final state
U(3S)
U(2S)
20s
U(1S)
Initial state
Gtot MeV
GU(1S)p+p- keV
U(2S)
0.032 6
U(3S)
0.020 9
U(4S)
20.5 19
U(10860)
110
U(10860)
4.9s
U(3S)
U(2S)
U(1S)
U(10860) decay or decay of overlapping new state Yb? Energy scan (7.9 / fb) around U(10860) has been performed to compare U(1S) p+p- and total hadronic cross sections. Answer will be ready soon.
U(10860)
U(1S)

11. V.Balagura, 10 Apr 2008, Frascati
Conclusions
e+e- →X J/y → D*D(*) J/y
Belle new
4660
(4415)
M(MeV)
e+e- → y’p+p- gISR
Y(4320)
4360
X(4160)
Z(4430)+
(4160)
4250
Y(4260)
B→ y’p+K
e+e- → J/y’p+p- gISR
cc2’
gg → cc2’ → DD
4010
(4040)
X(3872)
Y(3940)
X(3940)
X(3872) DD
B→ J/ywK
(3770) ’
h’c
cc2
cc1 hc
cc0
J/ hc
V.Balagura, 10 Apr 2008, Frascati
PHI PSI 08

12. V.Balagura, 10 Apr 2008, Frascati
Conclusions
New cs state in B+→ DsJ (2700)+ D0 → D0K+D0.
PWA of Ds1(2536)+→D*+K0S reveals dominance of S-wave. Conrtary to HQET expectations GS/Gtotal=0.72±0.05.
First result in the bottomonium sector:
anomalously high U(1,2,3S)p+p-, U(1S)K+K- cross sections at U(5S) energy (analogous to J/y pp/K+K-, y’ p+p- cross sections around Y(4260)).
Analysis of the energy scan around U(5S) is under way.
F Y
U ?
V.Balagura, 10 Apr 2008, Frascati
PHI PSI 08