Abstract
We present a calculation of hadron magnetic polarizability using the techniques of lattice QCD. This is carried out by introducing a uniform external magnetic field on the lattice and measuring the quadratic part of a hadron's mass shift. The calculation is performed on a 24{sup 4} lattice with standard Wilson actions at beta=6.0 (spacing a=0.1 fm) and pion mass down to about 500 MeV. Results are obtained for 30 particles covering the entire baryon octet (n, p, {sigma}{sup 0}, {sigma}{sup -}, {sigma}{sup +}, {xi}{sup -}, {xi}{sup 0}, {lambda}) and decuplet ({delta}{sup 0}, {delta}{sup -}, {delta}{sup +}, {delta}{sup ++}, {sigma}*{sup 0}, {sigma}*{sup -}, {sigma}*{sup +}, {xi}*{sup 0}, {xi}*{sup -}, {omega}{sup -}), plus selected mesons ({pi}{sup 0}, {pi}{sup +}, {pi}{sup -}, K{sup 0}, K{sup +}, K{sup -}, {rho}{sup 0}, {rho}{sup +}, {rho}{sup -}, K*{sup 0}, K*{sup +}, K*{sup -}). The results are compared with available values from experiments and other theoretical calculations.
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