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Euclidean $SU(2)$ gauge theory is studied in a nonlinear gauge. In thistheory, ghost condensation happens and gauge fields acquire tachyonic masses.It is shown that these tachyonic masses are removed by a gauge field condensate$\langle A_{\mu}^+A_{\mu}^-\rangle$. Because of the ghost condensation,monopole solutions are included naturally. We find the condensate $\langleA_{\mu}^+A_{\mu}^-\rangle$ makes the magnetic potential massive.

Condensate $\langle A_{\mu}^+A_{\mu}^-\rangle$ and massive magnetic potential in Euclidean gauge theories