  The excitations of the 7/3 fractional Hall state, one of the most prominent
states in the second Landau level, are not understood. We study the effect of
screening by composite fermion excitons and find that it causes a strong
renormalization at 7/3, thanks to a relatively small exciton gap and a
relatively large residual interaction between composite fermions. The
excitations of the 7/3 state are to be viewed as composite fermions dressed by
a large exciton cloud. Their wide extent has implications for experiments as
well as for analysis of finite system exact diagonalization studies.

Strongly Correlated Electrons