[Clas_hadron] Abstract for April APS meeting

[Diane Schott]

Dear Everyone,

I am planning on submitting an abstract to for the April APS meeting after
winter break. My abstract is pasted below. Please send comments to
"clas_hadron at jlab.org".

-- Diane Schott



Exotic mesons have been produced using hadron beams with varying
conclusions. The lighter of these states is the π1(1400) decaying to
ηπ−,
this was observed in E852 at Brookhaven. Photoproduction is predicted to
favor exotic meson production and increase the ratio of the π1 to a2
mesons.
The reaction γp → ∆++ X → pπ+ π−
(η) was analyzed using the ∆++ is used as a filter the probable
states of X. The Partial Wave Analysis have shown the final spectra of the
resonance decaying to ηπ− to be dominated by the quantum
state of JPC |m| = 2++ 1 corresponding to the presence of the a2(1320).
The JPC |m| = 1−+ 1 state, shows no structure in the intensity
distribution that would be conclusive with the presence of a
π1(1400). The phase difference between the JPC |m| = 1−+ 1 and
JPC |m| = 2++ 1 amplitudes show the interference between the two waves.
The data trends, along with the mass independent and dependent fits of the
resonance, will be shown.