[Clas_hadron] Abstract for Phi to Psi 2013

[dan watts]

Hi All,

Please find below an abstract for a talk I plan to give at Phi to Psi 
2103 in Rome.

Any comments or suggestions would be much appreciated.

The conference website is

http://www.roma1.infn.it/phipsi13/

I would plan to send the abstract on Wednesday.

Many thanks,
Dan



Talk title: Meson photoproduction from the nucleon at CLAS

An extensive measurement programme of meson photoproduction from the 
nucleon has been obtained exploiting the CLAS
detector in Hall-B of Jefferson Lab. The main aim of the
programme is to provide high quality experimental data to constrain 
partial wave analyses and reaction models used to determine the spectrum 
and properties of nucleon resonances. Obtaining accurate and detailed 
information on this spectrum would provide valuable insights regarding 
the dynamics and interactions of the nucleon's constituents. Theoretical 
predictions of the resonance spectrum can be
obtained from a range of approaches including constituent quark models
and more recently from Lattice QCD. Despite these exciting advances in 
theory the properties and even existence of many nucleon resonances are 
poorly established experimentally.

The programme of measurements at CLAS will provide new, quality data on 
  single and multiple meson photoproduction from the nucleon to better 
constrain the extraction of the spectrum. The experiments utilised 
linearly and circularly polarised photon beams on longitudinally and 
transversely polarised nucleon targets. The centre of mass energy, W, of 
the data set is 1.2 - 2.25 GeV, covering a large fraction of the 
resonance region. The Frozen spin target (FROST) and polarised H-D 
target used in the experiments will be discussed. Preliminary results 
for a range of single- and double- polarisation observables in meson 
photoproduction will also be presented.



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