'Target Mass' and 'Effective Target Mass'

摘要

The concept of 'Target Mass' and 'Effective Target Mass' is discussed. Evidence is presented which questions the validity of attempting to relate the 'Effective Target Mass' to the concept of a virtual pion surrounding the nucleon. Relations between the 4-momentum transfer, the quantity (E - P cos theta) of the recoil nucleon and the 'Effective Target Mass' are derived which show in conjunction with experimental data that the 'Effective Target Mass' of the order of a pion mass occurs accidentally. (Author)