[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, April 28, 2014
1:00 p.m. (coffee at 12:45 p.m.)
CEBAF Center, Room L102

*Electromagnetic Form Factors of the Octet Baryons From Lattice QCD*   

Phiala Shanahan
Adelaide University

I will present the results of recent lattice simulations of the electromagnetic form factors
of the octet baryons from the CSSM/QCDSF/UKQCD collaborations. The focus will be on the analysis
of those results using techniques to approach the infinite volume limit and the physical pseudo-
scalar masses at non-zero momentum transfer. The extrapolated proton and neutron form factors are
found to be in excellent agreement with those extracted from experiment. Given the success of these
calculations, I will describe how the strange electromagnetic form factors may be estimated from
these results under the same assumption of charge symmetry used in experimental determinations of
those quantities. Motivated by the necessity of that assumption, I will explore a method for
determining the size of charge symmetry breaking effects using the same lattice results discussed
previously.

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