BELLE Results on Heavy Spectroscopy

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 ee-? X(3940, 4160)
J/y and decaying to D()D() 4. Search for
1-- resonances decaying to y(1,2S)pp- via ee-?
gISR y(1,2S)pp- 5. First observation of
signals similar to Y(4260) in the bottomonium
sector surprisingly large U(1S,2S)pp-
(and evidence of  U(3S)pp-, U(1S)KK-)
transitions near the U(5S) resonance 6.
Conclusions
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Results which will not be covered in this talk
Exp M, MeV G, MeV JPC Production Decay
X(3872) Belle, CDF, D0, CLEO, BaBar 3871.40.6 lt2.3 1, 2- from B, pp pp-J/y, pp-p0 J/y, gJ/y
X(3872) Belle, BaBar 3875.40.70.4-1.7 0.9 3875.10.7-0.50.5 3.01.9-1.4 0.9 1, 2- B D0D0p0
Z(3930) Belle 392952 29102 2 gg D0D0, DD-
Y(3940) Belle, BaBar 39431113 3914.63.8-3.41.9 87 22 26 3312-8 5 J B wJ/y
B0?K0SX(3872)
B?KX(3872)
Summer 2007, Belle-CONF-0711
first observation of
B0?K0SX(3872) DM0.220.900.27 MeV
(tetraquark DM(83) MeV,
PRD71, 014028), B(B0) / B(B) 0.940.240.10
(contradicts to PRD71,
074005 lt0.1)
6.5s
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B? Z(4430) K ? y(2S) p K charged state ?
not cc!

• J/? ??-, ??-, ee-

PRL100, 142001, arXiv0708.1790, 605 fb-1
K(890) K(1430)
S-wave DD1(2420) thresh. effect
PRD76,114002 cucd tetraquark
hep-ph/0708.3997 DD1(2420) molecule
0708.4222,0710.1029, 0711.0494
M2(yp), GeV2
veto
veto
M2(K-/K0S p), GeV2
non-B bgr. from DE sidebands
veto
veto

• S-wave BW ph. space-like bgr
• 12130 ev., 6.5s significance
• M 443342 MeV
• G 4518-1330-13 MeV ? narrow
• ? cannot be explained by interf. in Kp channel

Kp mass from 30 MeV Z(4433) window
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B? DsJ (2700) D0 ? D0KD0 new cs state
PRL 100, 092001, 414 fb-1
y(3770) 6815ev., 5.5s M377654 MeV G27105
MeV B(2.20.50.3)10-4
DsJ(2700) 18230ev., 8.4s M2708911-10
MeV G1082336-31 MeV B(11.32.21.4-2.8)10-4
23S1, e.g. PLB 647 159 Chiral doublet state to
Ds1(2536), hep-ph/0307102
JP 0- 1- (preferred) 2-
c2/ndf 112/5 11/5 146/5
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PWA of Ds1(2536)?DK0S Ds1(2460)-Ds1(2536)
mixing
PR D77 032001 , 462 fb-1

• HQET D (S)-wave for jLSs3/2 (1/2)
• HQET not exact Ds1(2536) contains small
  admixture of j1/2
• Energy release is small ? D-wave is suppressed
• ? S wave due to j1/2 can be visible

Ds1(2536) from ee- continuum
xPgt0.8
567381 ev. almost no bgr.!
Ds1(2536) is slightly polarized in ee- ?
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 xpgt0.8
c2 corresponds to prob. 60
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C1 states ee- ?X(3940, 4160) J/y ? DD() J/y
arXiv0708.3812 , 693 fb-1
not enough stat.
Surprisingly large double charmonium production,
hc, cc0, hc(2S),
X(3940) observed in recoil to J/y
D
D
hc(3S)?
X(3940) update
J/y reconstr. instead of D()
D
D
2412-8ev. 5.1s M415625-2015
MeV G139111-6121 MeV
New state X(4160)
cc0(3P)? hc(4S)?
Bgr. (histograms) from D() sidebands
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Search for 1-- states ee- ?gISRY(4260) ? gISR
J/y p p-
PRL 99, 182004 , 548 fb-1
BaBar observation
12523 ev. M4259 8 G8823 8s
2
6
Y(4260)
y for calibration
New structure M4008
No enhancement in D() D() PRL 98, 092001
?
PRL 95, 142001, 233 fb-1
MC
theor. review PR 429, 243
11s
Cleo confirmation
5.1s
vs4.26 GeV
3.7s
PRL 96, 162003, 13.2 pb-1
5.4s
vs10GeV using gISR
MeV
MeV
PR D74, 091104(R), 13.3 fb-1
eV
MeV
MeV
BES ee- ?hadrons B(Y? J/ypp-) gt
1.3 _at_ 90 CL
eV
2 solutions with con/di-structive interf.
PRL 84, 594 88, 101802
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Search for 1-- states in ee- ?gISR y(2S) p p-
PRL 99, 142002, 673 fb-1
BaBar observation
Y(4260)-can not be ruled out
New structure M4660, 5.8s
BaBars peak, 8s
new res.?
M4324 24 G17233
PRL 98, 212001, 298 fb-1
Two y(2S)pp- structures are distinct from
J/ypp- ones
MeV
MeV
43S1, 53S1, 33D1, exotics ?
eV
MeV
MeV
eV
Two solutions with con/di-structive interf.
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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 pp-U, Wei-Shu Hou, PR D74,
017504 (2006)
? measure
pp-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
0.1/fb 2003 CLEO III 0.43/fb 2005 Belle
1.9/fb 2006 Belle 21.7/fb
Total cross-section
Collected mainly for Bs physics, 105 Bs / fb
Use it to measure pp-U(1,2,3S) cross section at
U(10860) and below via ISR
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Anomalous U(1,2,3S) pp-, U(1S) KK- cross
sections at U(5S)
3.2s
PRL 100, 112001, 21.7 fb-1
14s
Final state
U(3S)
U(2S)
20s
Initial state
U(1S)
Gtot MeV GU(1S)pp- 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)
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) pp- and total hadronic cross sections.
Answer will be ready soon.
U(1S)
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Conclusions
ee- ?X J/y ? DD() J/y
Belle new
4660
?(4415)
M(MeV)
ee- ? ypp- gISR
Y(4320)
4360
Z(4430)
X(4160)
?(4160)
Y(4260)
4250
B? ypK
ee- ? J/ypp- gISR
cc2
4010
gg ? cc2 ? DD
Y(3940)
X(3872)
?(4040)
X(3940)
X(3872)
DD
B? J/ywK
?(3770)
?
hc
cc2
cc1
hc
cc0
J/?
hc
V.Balagura, 10 Apr 2008, Frascati
PHI PSI 08
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Conclusions
New cs state in B? DsJ (2700) D0 ? D0KD0.
PWA of Ds1(2536)?DK0S reveals dominance of
S-wave. Conrtary to HQET expectations
GS/Gtotal0.720.05.
First result in the bottomonium sector
anomalously high U(1,2,3S)pp-, U(1S)KK- cross
sections at U(5S) energy (analogous to J/y
pp/KK-, y pp- 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