We derive a mean-field model for a semiflexible chain using a functional integral approach. The resulting model satisfies the global constraint [u(2)(s)]=1 rather than the hard constraint that u(2)(s)=1 for all s. The function u(s) is the tangent vector partial derivative r/partial derivative s, where r(s) represents the conformation of the chain and s is the are length. (C) 1995 American Institute of Physics. [References: 26]
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