[Theory-seminars] Theory Seminar today

[vguzey at jlab.org]

Dear all,

This is a reminder that we have the following Theory Seminar today,
Monday (March 8):


Theory Center Seminar
Monday, March 8, 2010
1:00 p.m.
CEBAF Center, Room L104
Coffee at 12:45 p.m.

*Baryon Chiral Perturbation Theory: One Loop and Beyond*

Matthias R. Schindler
George Washington University

For energies below 1 GeV, perturbative calculations in the strong
coupling of QCD are not meaningful. One of the theoretical tools to
explore this energy region is the use of an effective field theory, chiral
perturbation theory (ChPT). After giving an
introduction to the underlying ideas of ChPT I will focus on the
one-nucleon sector. With the development of new renormalization schemes
the evaluation of contributions beyond one-loop order has become possible
in a manifestly Lorentz-invariant formulation.
I will describe two different approaches to higher-order calculations:
the inclusion of additional degrees of freedom and the explicit
calculation of two-loop diagrams.
Results for the nucleon form factors and the nucleon mass will be
presented. I will also discuss the connection to lattice QCD.

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

                                 Best regards,
                                 Vadim, Christopher, Hiroyuki