[Nps] [EXTERNAL] NPS Open Mic contribution to QCD Town Meeting - Slides draft

[hamlet at jlab.org]

      Hi Tanja,

The slides are very compact and meaningful.
They reflect the NPS device and its related physical problems.
I liked them very much and I have no comments.
Thank you and good luck

       Hamlet.

> Hi everyone,
>
> Please see attached the draft slides for the Open Mic contribution at the
> QCD Town Meeting. The presentation is scheduled for Saturday morning and
> the slides should be uploaded on Friday by 9:00PM ET. Could you please
> take
> a look and send me any thoughts and/or updated plots to illustrate our NPS
> Science Program and future in the strongest possible way?
>
> Thanks!
>
> Best wishes,
> Tanja
>
> On Fri, Sep 16, 2022 at 11:15 AM Tanja Horn <hornt at jlab.org> wrote:
>
>> Hi everyone,
>>
>> Following up our discussion from yesterday's meeting I list below a
>> draft
>> for an Open Mic contribution to the US Long Range Plan QCD Town meeting
>> (
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__indico.mit.edu_event_538_&d=DwIBaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=GLZ1Uo9qDO03lszoD5gM3A&m=k4epBGlDc4v9k53hx_OwQKhRjHNyhjQw_wvaX9H5RxEWNm2PPG6jmSr8PJSvRFe3&s=U8Ym78ocNzGqAByxh7bhBEjuBRrHgj_xZdDEwYI6_W0&e=
>>  ). The submission deadline is on
>> September 19th. Please send any comments/suggestions etc. to my CUA
>> email
>> address: hornt at cua.edu (also listed in the CC line above).
>>
>> Thanks and best wishes,
>> Tanja
>>
>> >>>>
>> Contribution Title: The Neutral Particle Spectrometer Science Program in
>> Hall C
>>
>> Abstract:
>> The Neutral Particle Spectrometer (NPS) science program includes six
>> fully
>> approved experiments to date. The NPS was recently constructed by an
>> international collaboration and will see its first series of
>> experimental
>> runs in 2023. It offers unique scientific capabilities pushing the
>> energy
>> scale for studies of the transverse spatial and momentum structure of
>> the
>> nucleon through reactions with neutral particles requiring precision and
>> high luminosity. It enables precision measurements of the deeply-virtual
>> Compton scattering cross section at different beam energies to extract
>> the
>> real part of the Compton form factor without any assumptions. It allows
>> measurements to push the energy scale of real Compton scattering, the
>> process of choice to explore factorization in a whole class of
>> wide-angle
>> processes, and its extension to neutral pion photo-production. It
>> further
>> makes possible measurements of the basic semi-inclusive neutral-pion
>> cross
>> section in a kinematical region where the QCD factorization scheme is
>> expected to hold, which is crucial to validate the foundation of this
>> cornerstone of 3D transverse momentum imaging. Further extensions of the
>> NPS, including equipment upgrades, are under study to facilitate a
>> worldwide unique program of precision measurements of Compton Scattering
>> experiments, including time-like Compton scattering with a transverse
>> polarized target to test the universality of GPDs and to obtain useful
>> information to constrain them, in particular the GPD E, which is of
>> considerable interest due to its relation with partonic angular
>> momentum.
>>
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