[Triumf-seminars] TRIUMF Theory Seminar today at 13:00

[TRIUMF Seminars]

Date/Time: Tue 2014-07-29 at 13:00

Location:  Theory Room         

Speaker:   Elena Litvinova (Western Michigan University)

Title:     Nuclear field theory in a relativistic framework: recent developments and applications

Abstract: During the last decade, considerable progress of self-consistent nuclear structure theories based on the density functional concept has shown that they represent a successful strategy toward a universal and precise description of low-energy nuclear dynamics. Driven by fast progressing disciplines like astrophysics, experimental studies of exotic nuclei and synthesis of superheavy elements, such theories have achieved a level of sophistication which permits a description of a wide range of properties for arbitrarily heavy nuclei including those at neutron and proton drip lines. 

The objective of the presented work is to find self-consistent high-precision solutions of the nuclear many-body problem, where masses, matter and charge distributions, spectra, decay and reaction rates can be calculated within the same covariant framework at zero and finite temperatures. The mathematical apparatus of the nuclear field theory is advanced beyond the previously existing formulation by means of the Green's function technique, involving extra dimensions accounting for nuclear superfluidity effects. The effects of coupling between single-particle and emergent collective degrees of freedom, coupling to the continuum and the formation of bubbles, skins and other exotic geometries are included on equal footing. The theory allows for delicate interplay of various correlations while the Lorentz invariance puts stringent restrictions on the number of parameters in the underlying functional without reducing the quality of agreement with experimental data. A wide range of nuclear structure phenomena in medium-mass and heavy nuclei, including exotic ones, is described very successfully. In this talk, recent developments and perspectives of the covariant nuclear field theory are discussed in light of its applications to present and future research topics at radioactive beam facilities and to astrophysics. 




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