[Triumf-seminars] TRIUMF Nuclear Physics Seminar today at 15:30

[TRIUMF Seminars]

Date/Time: Mon 2015-11-09 at 15:30

Location:  Auditorium          

Speaker:   Angelo Calci (TRIUMF)

Title:     Chiral Hamiltonians in p-shell spectroscopy: Uncertainties, correlations, and predictions

Abstract: Based on the fundamental symmetries of QCD, chiral effective field theory (EFT) provides two- (NN), three- (3N), and many-nucleon interactions in a consistent and systematic improvable scheme. 
Recent developments to construct chiral NN+3N interactions enable exciting nuclear structure investigations as well as the quantification of fundamental uncertainties resulting from the chiral expansion and regularization. 
Due to the simplicity and flexibility of the Similarity Renormalization Group (SRG) this unitary transformation is commonly used to soften chiral interactions in nuclear structure and reaction physics.
The development of a consistent SRG evolution beyond the two-body level lead to successful applications of chiral NN+3N interactions with various many-body methods.

In this talk the ab initio importance truncated no-core shell is used to perform a first analysis of several available chiral NN+3N Hamiltonians in spectroscopy for 6Li, 10B, and 12C.
The theoretical predictions are confronted with experiment and a first step towards a reliable uncertainty quantification of chiral EFT is presented.
Finally, the investigation is extended to electric quadruple and magnetic dipole observables, whose ab initio descriptions are generally challenging. 
It will be illustrated that distinct and robust correlations can be identified in microscopic calculations, that provide insight into the structure of the nuclear state. Moreover, these correlations can be used for precise predictions, e.g., of electric quadruple moments, to provide guidance for future experiments.



______________________________

General TRIUMF seminar information available at http://www.triumf.ca/home/upcoming-events/about-seminars-lectures