Speaker
Frank Lee
(George Washington University)
Description
We explore a general method based on four-point functions in lattice QCD. The electric polarizability ($\alpha_E$) of a charged pion has been determined from the method in a previous simulation. Here we focus on the magnetic polarizability ($\beta_M$) using the same quenched Wilson action on a $24^3\times 48$ lattice at $\beta=6.0$ with pion mass from 1100 to 370 MeV. The results from the connected diagrams show a large cancellation between the elastic and inelastic contributions, leading to a relatively small and negative value for $\beta_M$ consistent with chiral perturbation theory.
| Topical area | Structure of Hadrons and Nuclei |
|---|
Primary author
Frank Lee
(George Washington University)
Co-authors
Walter Wilcox
(Baylor University)
Andrei Alexandru
(George Washington University, University of Maryland)
Christopher Culver
(University of Liverpool)