[Clas_hadron] NSTAR 2015 abstract revised

[Tsuneo Kageya]

Hi, 

 Thank you for your comments on my abstract for NSTAR2015.


Ciao Annalisa,

 The following is the final version of my abstract to NSTAR2015.
 If you add this to the CSC site, you are appreciated.

   Ciao, Tsuneo Kageya.

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 Measurements of spin observables in single pion photo-production from
polarized neutrons in solid HD

  Tsuneo Kageya 

 (Thomas Jefferson National Accelerator Facility, Newport News, VA 23606)

Recent Lattice QCD calculations have supported the long standing quark model
expectation of many more excited states of the nucleon than have been
experimentally observed. Searches for such "missing states" require detailed
partial wave analyses of many polarization observables. Furthermore, the
separation of isoscalar and isovector couplings to isospin 1/2 resonances
requires information from both proton and neutron reactions. The present
data base of neutron reactions is very sparse. To address this shortfall,
the Jlab g14/E06-101 experiment collected data during 2011-2012 using the
CLAS with circularly and linearly polarized photons incident on
longitudinally polarized Deuterons in frozen-spin targets of solid
Hydrogen-Deuteride (HD). Studies of experimental and theoretical methods
that infer "free neutron" spin observables from deuteron data are ongoing.
Preliminary results for the single pion channel,  γ + n (p) → π− +  p (p),
will be discussed. Beam-target helicity asymmetries (E) have been extracted
from data with circularly polarized photons, and these reveal distinctively
different features from the corresponding reactions on polarized protons.
The linearly polarized beam asymmetry (Ʃ) and the double-polarization
asymmetry (G) for the pi- p channel are also under study.