Are Occupation Numbers Observable?

Abstract

The question of whether occupation numbers and momentum distributions of nucleons in nuclei are observables is considered from an effective field theory perspective. Field redefinitions lead to variations that imply the answer is negative, as illustrated in the interacting Fermi gas at low density. Implications for the interpretation of (e,e'p) experiments with nuclei are discussed.

8 pages, revtex4, 4 ps figures

References in corpus (3)

• What is Renormalization?
• Constructing Parton Convolution in Effective Field Theory
• Ambiguities in the implementation of the impulse approximation for the response of many-fermion systems

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