[Deeppwg] talk at IoP conference

Daria Sokhan daria at jlab.org
Mon Apr 1 08:42:05 EDT 2013


Dear everyone,

Apologies for the lateness, but I've been invited to give a talk at
the UK Institute of Physics (IoP) Nuclear Physics Conference in York,
UK, on the 8th of April. They asked me to talk about my recent results
in hadron physics and I'd like to present my tentative studies of
neutron-DVCS from the eg1-dvcs experiment and talk about the
neutron-DVCS proposal and Central Neutron Detector for CLAS12. The
conference has a very large PhD student contingent so the talk won't
be too technical, and I won't present anything that I haven't already
shown previously -- for example at SPIN-2012 in Dubna.

The title and abstract are as follows:

"Neutrons in a Spin -- Nucleon Structure at Jefferson Lab.

The nucleon is the most familiar state of quark confinement,
manifesting QCD across scales at which it cannot be calculated
directly. The experimental study of the nucleon reveals a rich and
complex structure, but raises many questions which are as yet
unanswered. One of these is the nucleon spin puzzle: it is known that
the intrinsic spin of quarks contributes only ~30% to nucleon spin,
but what is responsible for the rest? A very effective method of
probing the nucleon is via the electromagnetic interaction and
Jefferson Laboratory (JLab) in Virginia, USA,
is dedicated to the study of hadron structure with high energy
electron and photon beams. The facility is currently undergoing an
upgrade to double its maximum energy of operation to 12 GeV, which
will allow the nucleon to be probed at a much deeper scale. It is
precisely in this regime that Deeply Virtual Compton Scattering (DVCS)
off a neutron is particularly sensitive, via determination of
Generalised Parton Distributions, to the contribution of the total
angular momentum of quarks to nucleon spin. A dedicated experiment,
which will make use of the CLAS12 detectors at JLab, is currently in
preparation and involves the construction of a specially-designed
neutron detector. Additionally, a preliminary study of neutron-DVCS
from a past experiment using the CLAS detectors is nearing
completion."

Please let me know if anyone has any comments,

Many thanks,
Daria



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