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Dear spectroscopysts,<br>
here below a message from Irene Zonta. Please send your comments
directly to Irene.<br>
Cheers<br>
Marco<br>
<i><br>
</i><i>Dear All,
</i><i><br>
</i><i>The following abstract has been submitted and approved by the
NSTAR 2015 Organization Committee.
</i><i><br>
</i><i>I am preparing the slides which I will send for approval.
</i><i><br>
</i><i>
Sincerely
</i><i><br>
</i><i>
Irene Zonta
</i><i><br>
</i><i>
The text may be found below:
</i><i><br>
</i><i>
Constituent Quark Models and recent Lattice QCD calculations
predict an excited baryon spectrum much richer than the one
experimentally observed, the so-called missing resonances problem.
These missing states may be revealed by partial wave analysis of
not yet measured polarization observables. The CLAS g14/E06-101
(HDice) experiment is part of the N∗ spectroscopy program at
Jefferson Laboratory: it has taken photoproduction data using both
circularly- and linearly- polarized photons in the photon energy
range up to 2.5 GeV impinging on a longitudinally-polarized
Hydrogen-Deuteride (HD) frozen spin target, where both the proton
and the neutron are polarized. We present results on the
beam-helicity asymmetry I⊙, for the double charged pion
photoproduction on both proton and neutron targets and the
helicity difference P⊙z on the proton target. Preliminary results
on the double polarization observable E for the photoproduction of
the ρ vector meson on the proton will be also discussed.
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