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If the comparator was not unitary, you could not expand it in terms of HermitianHermitean generators of $SU(2)$, which is required in order to construct the non-Abelian covariant derivative, as it is done in Peskin and Schroeder.
If the comparator was not unitary, you could not expand it in terms of Hermitian generators of $SU(2)$, which is required in order to construct the non-Abelian covariant derivative, as it is done in Peskin and Schroeder.
If the comparator was not unitary, you could not expand it in terms of Hermitean generators of $SU(2)$, which is required in order to construct the non-Abelian covariant derivative, as it is done in Peskin and Schroeder.
If the comparator was not unitary, you could not expand it in terms of Hermitian generators of $SU(2)$, which is required in order to construct the non-Abelian covariant derivative, as it is done in Peskin and Schroeder.
If the comparator was not unitary, you could not expand it in terms of Hermitian generators of $SU(2)$, which is required in order to construct the non-Abelian covariant derivative.
If the comparator was not unitary, you could not expand it in terms of Hermitian generators of $SU(2)$, which is required in order to construct the non-Abelian covariant derivative, as it is done in Peskin and Schroeder.
If the comparator was not unitary, you could not expand it in terms of Hermitian generators of $SU(2)$, which is required in order to construct the non-Abelian covariant derivative.
