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I'm trying to compute an EoS to walecka model of barion interaction, but i'm having trouble to solve this equation by bisection.

M*=M-gs²*nb/ms²

where nb= (M*)*( kf*Ef- (M*)²* ln (kf+Ef)/M*) , using Ef= sqrt( kf²+(M*)²)

and Cs²= gs² M² / ms² = 267.1

I'm using J. D. Walecka as my reference for obvious reasons, but the graph of M*/M is not matching with the reference.

May any of you can help me to solve this equation by bisection ?

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# A Walecka mean field theory, Help to find its M*

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