[Clas_hadron] [EXTERNAL] Re: APS April Meeting abstract

[Viktor Mokeev]

 Hi Igor' and Astrid,
When Astrid write inclusive structure function or inclusive electron scattering that means sum over ALL inclusive channels. I can not see need for further clarification of this point.

Astrid was saying on the mass range for the resonances which were included into evaluation of the resonant contribution. Mass of the resonance is well defined quantity listed in PDG.  She never saying about W. However, it may be usefull to say  that we are analyzing inclusive electron scattering observables at W<2.0 GeV and Q^2 from 1.0 to 5.0 GeV^2.

   Best Regards,
                                 Victor
________________________________
From: Clas_hadron <clas_hadron-bounces at jlab.org> on behalf of Astrid Hiller Blin <ahblin at jlab.org>
Sent: Wednesday, December 15, 2021 12:18 PM
To: igor at gwu.edu <igor at gwu.edu>
Cc: CLAS Hadron Spectroscopy <clas_hadron at jlab.org>
Subject: Re: [Clas_hadron] [EXTERNAL] Re: APS April Meeting abstract

Hi Igor,

It's W = 1.75 - I will specify that in the abstract to APS. I am more interested in N* and Delta resonances; indirectly I'm using pion, two-pion and eta production data for N* and Delta electrocouplings: do you think this should be specified in the abstract?

Thank you!
Astrid

On Wed, Dec 15, 2021 at 12:15 PM Igor Strakovsky <igor at gwu.edu<mailto:igor at gwu.edu>> wrote:
Dear Astrid,

One small question is - your energy 1.75 GeV is Eg or W? Then what mesons you are going to talk - pions, eta, eta', kaons?

Cheers, Igor

-----
Igor Strakovsky, SAID INS The George Washington University
VSTC: 571-553-8344, Cell: 703-728-5627, Skype: igors1945_2
Emails: igor at gwu.edu<mailto:igor at gwu.edu>, igor at jlab.org<mailto:igor at jlab.org>


On Wed, Dec 15, 2021 at 12:09 PM Astrid Hiller Blin <ahblin at jlab.org<mailto:ahblin at jlab.org>> wrote:
Hello!

Please find my abstract for the APS April meeting, session E11, appended below.

All the best,
Astrid

Polarized and unpolarized proton structure in the resonance region: exclusive data-driven insights
Nucleon resonance contributions to the inclusive proton structure functions are computed from resonance electroexcitation amplitudes in the mass range up to 1.75 GeV extracted from CLAS exclusive meson electroproduction data. Taking into account interference effects between nucleon resonances, the resonant contributions are compared with inclusive proton structure functions evaluated from the available data in the resonance region. Resonance contributions remain substantial over the entire range of photon virtualities < 4 GeV^2 where electroexcitation amplitudes have been obtained. Their Q^2 evolution displays pronounced differences in the first, second and third resonance regions. We compare the structure functions in the resonance region with those computed from parton distributions fitted to deep-inelastic scattering data, and extrapolated to the resonance region, providing new quantitative assessments of quark-hadron duality in inclusive electron-proton scattering. Ultimately, this paves the path to a physically founded combined description of the connection between the low and high-energy regimes.

----------------------------------------------
Astrid Hiller Blin (PhD)
Postdoctoral fellow
Thomas Jefferson National
Accelerator Facility (Jefferson Lab)
12000 Jefferson Ave
Newport News, VA 23606, USA
Phone: +1 (757) 291 6890
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