[Triumf-seminars] TRIUMF Colloquium today at 10:00

[postmaster at admin.triumf.ca]

Date/Time: Fri 2009-02-20 at 10:00

Location:  Auditorium          

Speaker:   Lucas Platter (Ohio State University)

Title:     Novel Methods in Nuclear Few- and Many-Body Physics

Abstract: Future efforts in theoretical nuclear physics should provide accurate and model-independent predictions.  Effective field theories (EFTs) offer a framework that guarantees not only model-independence but also a prescription to increase the accuracy of calculations systematically. I will outline how an EFT built up from contact interactions alone can be used to calculate properties of weakly-bound nuclei with A=2-4 and will address how the same framework is applied to halo systems and alpha clusters.

For heavy nuclei a direct calculation of observables in a field theoretical framework is not feasible. Modern potentials derived from chiral effective theory provide a Hamiltonian respecting the underlying symmetries of QCD. However, although they provide an excellent description of few-nucleon data, their singular nature renders them inappropriate for calculations of larger systems. I will discuss how new approaches to density functional theory in combination with modern renormalization group techniques promise to relate the properties of heavy nuclei to such microscopic interactions.


Stimulants will be available 15 minutes before the talk.

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