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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The pion polarizability is investigated in the Nambu- Jona - Lasinio model at finite
temperature. The quark and pion loops, scalar and vector intermediate resonanses were
considered. We have shown that the polarizabilities of charge and neutral pions have a
very different behavior near the critical temperature if we consider the Compton effect
off the pion. The charged pion polarizability is positive, decreases very quickly in the
region where T > 200MeV and has no contributiolls from meson clouds. The neutral
pion polarizability is negative and monotonically increases in absolute value with T
together with contributions of pion clouds.