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

[Tanja Horn]

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://indico.mit.edu/event/538/). 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.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/nps/attachments/20220916/12c41dae/attachment.html>