On the Renormalization of the Susceptibility of a Fermi Liquid

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Abstract
It is shown that the susceptibility of a normal Fermi liquid can be renormalized without using Ward identities for the derivatives of the mass operator with respect to the magnetic field. The procedure is completely analogous to the renormalization of the compressibility. The result which expresses the susceptibility in terms of Landau parameters is correct only to lowest order in temperature. The behavior of higher‐order terms in temperature is discussed.