[Theory-seminars] Theory seminars next week

[vguzey at jlab.org]

Dear all,

We have two seminars next week:
* Monday (1pm, Nov 29th): Barry Holstein (University of Massachusetts
Amherst)
* Wednesday (2pm, Dec 1st) cake seminar: Vadim Guzey
Titles, abstracts and more details below.

A complete list of upcoming theory seminars and talks from previous
seminars are available from:
http://www.jlab.org/~thomasc/seminars/

 -----
 Monday, Nov 29th
 1pm (coffee at 12:45)
 Room L104

Hadronic Parity Violation

Barry Holstein (University of Massachusetts Amherst)

The subject of parity violation in strong and electromagnetic interactions
due to the presence of the weak force has been studied now for more than
fifty years. However, despite a great deal of experimental and theoretical
effort in this regard, our understanding of such effects remains cloudy.
There are a number of reasons for this. One is that in contrast to the
parity-conserving situation, where there are only two fundamental
constants (scattering lengths) which describe the NN interaction, in the
parity-violating case there are five. Also, for the past thirty years
nearly all such processes have been described within the model-dependent
DDH meson-exchange model. Recently effective field theoretic techniques
have been developed in order to ameliorate the latter problem and a series
of high precision experiments has been undertaken in order to address the
former. A review of both the experimental and theoretical situations will
be presented.

 -----
 Cake Seminar
 Wednesday, Dec 1st
 2pm
 Room L104

Leading twist nuclear shadowing and quark and gluon distributions in nuclei

Vadim Guzey (Jefferson Lab)

Nuclear shadowing is a high-energy (small Bjorken x)
coherent phenomenon that suppresses nuclear structure functions and
parton distributions accessed in various hard processes with nuclei
compared to those in the free proton case.
I will present our approach to nuclear shadowing
which we call the leading twist theory of nuclear shadowing and
discuss its important predictions for the usual, diffractive,
and generalized parton distributions in nuclei at small x.

 Vadim, Christopher, and Hiroyuki
 JLab Theory Seminar Organizers
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