University of Washington
Carlos Munoz Camacho
Agenda: 3-dimensional parton
structure of the nucleon encoded
in GPDs and TMDs
Agenda: dedicated workshop:
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The Jefferson Laboratory Upgrade to 12 GeV|
September 14 - October 16 & October 26 - November 20
The goal of this program is to bring experimentalists and theorists together
to explore important aspects of the exciting physics program which
will be enabled by the
Jefferson Laboratory 12 GeV Upgrade.
This upgrade provides a unique opportunity
through its combination of luminosity,
duty factor and kinematic reach to make profound contributions
to the study of hadronic matter.
Through its unprecedented polarized beam capabilities, JLab at 12 GeV
allows detailed studies of both the spin and angular momentum distributions
of quarks in nucleons, and low-energy weak neutral current processes through
parity-violating electron scattering.
Researchers will be able to obtain detailed maps of the distribution of
valence quarks in both coordinate and momentum space.
between coordinate space and momentum space maps will provide "3D" images of the
substructure of the nucleons.
Measurements using nuclear targets will
provide unprecedented access to the role of valence quarks in nuclei,
and the dynamical process by which such quarks propagate through the
nuclear medium and form hadrons. The EMC discovered
some 25 years ago that the momentum distribution of
quarks inside the nuclei was found to differ, notably in the valence
region, from that of quarks in a free nucleon. While there are hundreds
of papers on this subject, there is no universally accepted explanation.
The valence quark region can be accessed in multiple ways using the high
luminosity at 12 GeV, which would allow experimentalists and theorists
The effects of color transparency and short-range nucleon-nucleon correlations
are closely related to these topics and form focus points of the program.
A new generation of hadron spectroscopy experiments and theoretical
investigations will allow the search for exotic hadrons and investigate
various puzzles involving mesonic and baryonic spectra. Finding exotic hadrons and
determining their spectrum underline the role of gluon self-interactions
in hadrons, and provide the basis for understanding the confinement mechanism
that eternally locks quarks and gluons in hadrons. It is vital that theorists
concerned with the physics of reaction mechanisms work with experimentalists
to understand the relevant energy-dependent physics backgrounds that could
mimic potential signals of a resonant state.
We organize this broad thrust into three categories:
**There is a mandatory workshop registration fee of $85, due at the time of registration.
|9/14-18:||3-dimensional parton structure of the nucleon encoded in GPDs and TMDs|
|9/14-10/16:||Pdfs, gpds, tmds, valence quarks |
|**11/9-11/13:||dedicated workshop: Hadron Spectroscopy|
|11/9-11/20:||Search for exotics |
Determining the spin and flavor dependence of the
parton distribution functions, the generalized parton
distributions and the transverse momentum distributions, of
the valence quarks that reside in the nucleon. This would culminate in
nucleon tomography measurements to discover the true three-dimensional
structure of nucleons. Topics will include i) the control of the necessary
resummation, target and quark mass, and higher-twist effects in the region
of valence quarks, and how they can be disentangled from symmetry breaking
effects; ii) linking form factor and valence quark measurements to nucleon
models and Lattice QCD calculations; and iii) linking the roadmaps towards
angular and orbital momentum of valence quarks that can come from form
factor and quark longitudinal and transverse momentum distributions. Relevant
symmetries will also be studies. This activity
would occur during the period of 9/14 to 10/16, including a dedicated one-week
workshop during the first week. The workshop held 9/14-18 will be organized by Harut Avakian, Delia Hasch, Charles Hyde, Andreas Metz, and Christian Weiss.
Accurate studies that allow researchers to disentangle
origin of the "nuclear EMC effect" in the valence quark region. This requires
shedding light on the role valence quarks play in the deep structure
and properties of atomic nuclei and how they interact with a dense nuclear
medium. Topics will include the effect of the nuclear medium on valence
and sea quark distributions, the interactions of quarks and gluons
with the vacuum and the nuclear medium and any reaction involving a nuclear
target. This activity would occur during the period
The search for exotic mesons using high energy photon-proton
collisions. The fluctuations of the gluonic vacuum are an unavoidable
part of the structure of mesons. The refinement of experimental and theoretical
tools to establish such exotic mesons and make general progress in spectroscopy
will be the topic of a dedicated
workshop to be held Nov. 9-13, followed by another week of intense work.