[Clas_hadron] DNP 2013 abstract

[Viktor Mokeev]

 Hi Evan,

 Please find my suggestions:

 Third-resonance-region states are notoriously
difficult to extract in single- and double-pion production, even with
the discriminating power of exclusive measurements, due to overlapping
resonance widths and multi-channel couplings.----->

Third-resonance-region is composed by many overlapping N* states and strongly affected by the final state interaction between many open exclusive channels.
The information from different exclusive channels is of particular importance for reliable extraction of resonance parameters.



The omega reaction
channel, however, provides ---->

The exclusive omega electroproduction
provides


extracting corresponding transition form factors.----->
extracting gvNN* transition form factors at different photon virtualities 


 In this work,
preliminary results were obtained from data taken with the CLAS detector
at Jefferson Lab during run periods E1F and E16. 

I suggest you here list explicitly what was obtained.



   Best Regards,
                        Victor

----- Original Message -----
From: "Evan Phelps" <evan.phelps at gmail.com>
To: "clas hadron" <clas_hadron at jlab.org>
Sent: Tuesday, June 25, 2013 3:40:04 PM
Subject: [Clas_hadron] DNP 2013 abstract

I would greatly appreciate any suggestions regarding the following DNP
2013 abstract before submitting it.

Cheers,

Evan Phelps

********************

Omega electroproduction as a probe of high-lying resonances

Differential cross-sections of omega(783) electroproduction in the
exclusive three-pion reaction channel off the proton will be reported
over a kinematic range that includes the third resonance region,
specifically, from the production threshold to W = 3.0 GeV and from Q2
= 1.0 GeV2 to 5.5 GeV2.  Third-resonance-region states are notoriously
difficult to extract in single- and double-pion production, even with
the discriminating power of exclusive measurements, due to overlapping
resonance widths and multi-channel couplings. The omega reaction
channel, however, provides an excellent probe of these high-lying
resonances due to the narrow 9-MeV omega decay width and its isoscalar
nature that restricts it to isospin-1/2 resonance couplings.  Recent
omega photoproduction work[1] suggests contributions from several
near-threshold and high-lying resonances, including N5/2+(1680),
N3/2-(1700), and N7/2-(2190).  Extending our view of the omega channel
into the virtual photon domain, via exclusive electroproduction
measurements, provides an opportunity to further explore potential
resonance contributions and offers the natural next step toward
extracting corresponding transition form factors.  In this work,
prelimary results were obtained from data taken with the CLAS detector
at Jefferson Lab during run periods E1F and E16.  This is the
highest-statistics data sample of omega electroproduction below W of 3
GeV ever analyzed.
_______________________________________________
Clas_hadron mailing list
Clas_hadron at jlab.org
https://mailman.jlab.org/mailman/listinfo/clas_hadron