[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, Nov. 29, 2010
1:00 p.m. (coffee at 12:45)
CEBAF Center, Room L104

Barry Holstein
University of Massachusetts Amherst

*Hadronic Parity Violation*

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.

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