[G14_run] Tsuneo's draft abstract for SPIN2016

[Tsuneo Kageya]

Dear,

 I would like to present our results at SPIN2016 in September this year.
I would like to show pi-p E asymmetries (which is supposed to be final)
and G and Ʃ ones which have been progressed by Haiyun.

 The following is a draft abstract for this.
 Comments are welcome.

   Regards, Tsuneo Kageya.


Double-spin observables in charged pion photo-production from
polarized neutrons in solid HD using the CLAS at Jefferson Lab.

  Tsuneo Kageya 

 (Physics Division, 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. Detailed partial-wave analyses (PWA) fit to many
polarization observables are required to searches for such "missing states”.
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
issue, the Jlab g14/E06-101 experiment was performed 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. Data with linearly polarized
photons have been used to extract the beam asymmetry  , along with the
beam-target asymmetry G. The preliminary results for the E, Ʃ and G
asymmetries will be compared to existing PWA predictions.