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0-+ Klempt. No eta(1295) eta(1440;1780) =2S; G>2GeV to be found. Why 1440 so big in psi radiative?. 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... - PowerPoint PPT Presentation
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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