title: Evolution of nuclear shells due to the tensor force.
abstract: The monopole effect of the tensor force is presented, exhibiting how spherical single-particle energies are shifted as protons or neutrons occupy certain orbits. An analytic relation for such shifts is shown, and their general features are explained intuitively. Single-particle levels are shown to change in a systematic and robust way, by using the pi + rho meson exchange tensor potential, consistently with the chiral perturbation idea. Several examples are compared with experiments.
authors.affiliation: Department of Physics, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. otsuka@phys.s.u-tokyo.ac.jp
authors.forename: Takaharu
authors.initials: T
authors.lastname: Otsuka
authors.forename: Toshio
authors.initials: T
authors.lastname: Suzuki
authors.forename: Rintaro
authors.initials: R
authors.lastname: Fujimoto
authors.forename: Hubert
authors.initials: H
authors.lastname: Grawe
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Akaishi