A symmetry breaking mechanism by parity assignment in the noncommutative Higgs model

We apply the orbifold grand unified theory (GUT) mechanism to the noncommutative Higgs model. An assignment of [Formula: see text] parity to the “constituent fields” induces parity assignments of both the gauge and Higgs bosons, because these bosons are treated as some kind of composite fields in this formalism.

SYSTEMATIC STUDY OF THE MANY-PARTICLE AND MANY-HOLE STATES IN AND AROUND THE ISLAND OF INVERSION

Deformation and many particle and many hole configurations in the island of inversion are investigated with Antisymmetrized Molecular Dynamics (AMD). The result suggests the coexistence of many particle and many hole configurations with different deformation at small excitation energy. In the case of 33 Mg , we suggest the negative-parity assignment for the ground state. Other particle hole configurations are predicted as the excited states.

MESONIC WEAK DECAY OF Λ–HYPERNUCLEI: A NEW TOOL FOR HYPERNUCLEAR SPECTROSCOPY

The FINUDA experiment has performed a systematic study of the Mesonic Weak Decay (MWD) of Λ hypernuclei by analyzing all the data collected from 2003 up to 2007. Negatively charged pion spectra from mesonic decay were measured with magnetic analysis for the first time for [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text]. Branching ratio Γπ-/Γtot were derived from the measured spectra. Based on these measurements, the spin-parity assignment 1/2+ for [Formula: see text] and 5/2+ for [Formula: see text] ground-state are confirmed and a spin-parity 3/2+ for [Formula: see text] ground-state is assigned for the first time. Ideas for precision measurements of MWD at the J-PARC accelerator's complex are finally presented.