3,330 research outputs found
Magnetic Properties of Precession Modes Built on High-K Multi-quasiparticle States in ^{178}W
We present an example that shows that the random phase approximation
performed on high-K multi-quasiparticle configurations leads to a rotor picture
by calculating excitation energies and magnetic properties of ^{178}W. Then we
deduce the effective g_R of the high-K rotors and compare it with that of the
low-K one.Comment: 6 pages, 3 figures, Prog. Theor. Phys., accepte
Wobbling motion in triaxial superdeformed nuclei
We discuss some characteristic features of the wobbling motion excited on the
triaxial superdeformed Lu nucleus. We show how these features are connected to
the moments of inertia microscopically calculated by means of the quasiparticle
RPA in the rotating frame.Comment: 6 pages, 7 figures, Proc. 6th China-Japan Joint Nuclear Physics
Symposium, Shanghai, China, 2006, Ed. Y.-G. Ma and A.Ozaw
Nuclear Wobbling Motion and Electromagnetic Transitions
The nuclear wobbling motion is studied from a microscopic viewpoint. It is
shown that the expressions not only of the excitation energy but also of the
electromagnetic transition rate in the microscopic RPA framework can be cast
into the corresponding forms of the macroscopic rotor model. Criteria to
identify the rotational band associated with the wobbling motion are given,
based on which examples of realistic calculations are investigated and some
theoretical predictions are presented.Comment: 39 pages, plain TeX, figures not included, available via conventional
mai
High-K Precession modes: Axially symmetric limit of wobbling motion
The rotational band built on the high-K multi-quasiparticle state can be
interpreted as a multi-phonon band of the precession mode, which represents the
precessional rotation about the axis perpendicular to the direction of the
intrinsic angular momentum. By using the axially symmetric limit of the
random-phase-approximation (RPA) formalism developed for the nuclear wobbling
motion, we study the properties of the precession modes in W; the
excitation energies, B(E2) and B(M1) values. We show that the excitations of
such a specific type of rotation can be well described by the RPA formalism,
which gives a new insight to understand the wobbling motion in the triaxial
superdeformed nuclei from a microscopic view point.Comment: 14 pages, 8 figures (Spelling of the authors name was wrong at the
first upload, so it is corrected
The Three Site Model at One-Loop
In this paper we compute the one-loop chiral logarithmic corrections to all
O(p^4) counterterms in the three site Higgsless model. The calculation is
performed using the background field method for both the chiral- and
gauge-fields, and using Landau gauge for the quantum fluctuations of the gauge
fields. The results agree with our previous calculations of the
chiral-logarithmic corrections to the S and T parameters in 't Hooft-Feynman
gauge. The work reported here includes a complete evaluation of all one-loop
divergences in an SU(2) x U(1) nonlinear sigma model, corresponding to an
electroweak effective Lagrangian in the absence of custodial symmetry.Comment: 40 pages, nine included eps figures. Minor corrections mad
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