0-+ Klempt No eta(1295)

eta(1440;1780) =2S; G>2GeV to be found

Why 1440 so big in psi radiative?

1-+ Eugenio

pi_1(1600) in rho pi OK; similar width to b1pi;f1pi

Hybrid character OK BUT…pi_1(1400): what is it? How many 1-+; Resonant? S-wave threshold effects; molecules...

Pi(1850): hybrid? K*K*? More than one??

PenningtonPwa ambiguities affect output.What/which are the real resonance states?Then consider what they are

ArndtBuccellaCarlsonDyakanovEllisFaberGianniniHuangInoueJaffeKarlinerLipkinMaltmanNussinovOhPolyakovQiangRosnerStechTrillingUVenezianoWilczekXiangYangZhu

If Theta doesn’t exist,then these (and many other theorists)should be congratulated on their creativity

FC Less optimistic

HERA Ksp if real could be conventional Sigma; is NOT support for Theta_5

Don’t fall into creationism trap: “if you cant explain then it proves I am right”….Null result that is “not inconsistent” with a signalis NOT support for the signal.

When appealing to models take account of ALL their implications e.g. of Sigma_5 narrowthat should also be produced.

Include zero sigma expts (many): start with thoseand then compare the claimed signals = psychological different conclusion

New Heavy MesonsName Mass

(MeV)

Width

(MeV)

comments

X(3872) 3871.90.6 narrow J/, D pair

X(3940) 39436 6 <52 Recoil mass

Large D pair B.R.J/ not seen

Y(3940) 39431113 872226

Y(4260) 42598 26 8823 6

4 J/,

D pair not seen

Z(3930) 393142 2083 D pair

What is it?

1++,?

c(3S)?

hybrid?

1--,?

’c2?

Lou; Maiani; Close

Belle e+e- to + X ???

Belle Inconsistent strengths?

big

?

radial

??thresholds

and1+

?

Claim of Hybrid Charmonium by BELLE

Is this the same as X(3940)?Is it hybrid charmonium as claimed? (See if is in psi rho as well)

New Heavy MesonsName Mass

(MeV)

Width

(MeV)

comments

X(3872) 3871.90.6 narrow J/, D pair

X(3940) 39436 6 <52 Recoil mass

Large D pair B.R.J/ not seen

Y(3940) 39431113 872226

Y(4260) 42598 26 8823 6

4 J/,

D pair not seen

Z(3930) 393142 2083 D pair

What is it?

1++,?

c(3S)?

hybrid?

1--,?

’c2?

Lou; Maiani; Close

e+e- \to psi pi pi BaBar sees new vector cc*

Y(4260)

BaBar B decay to Y(4260)

Y(4260) = Non resonant S-wave threshold

Y(4260) Three Possibilities

Probably not………….

Maiani

Close

Close

Lou

Is it really a resonance?

D

D_1 uu * pi pi

psi

e+e- DD_1 is first S-wave charm thresholdand occurs \sim 4.2 GeV !

e+e- Ds Ds_1 psi KK should show similar

Lou

f0(980)?Maybe; Confirm.

All consistent with predictions for hybrid charmoniumFC+Page 1995

This is a clear distinction with hybrid for which this is ~ zero

Maiani

Close

Psi polarisation testHQ symmetry would imply no psi; but also no 4260For m_c DD_1 threshold and below D*D_0

Y(4260) Two Possibilities

Maiani

Close

DD_1 and not DsDs for hybrid

DsDs and not DD_1 for tetraquark

Experimentcan decide