Bulletin of the American Physical Society
APS April Meeting 2017
Volume 62, Number 1
Saturday–Tuesday, January 28–31, 2017; Washington, DC
Session R15: The Future of Nucleon-Nucleon InteractionInvited
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Sponsoring Units: GFB DNP Chair: Matthias Schindler, University of South Carolina Room: Washington 2 |
Monday, January 30, 2017 10:45AM - 11:21AM |
R15.00001: Historical perspective and future prospects for nuclear interactions Invited Speaker: Ruprecht Machleidt The nuclear force is the heart of nuclear physics and, thus, the significance of this force for all of nuclear physics can hardly be overstated. Research on this crucial force has by now spanned eight decades and we are still not done. I will review the rich history of hope and desperation, which had spin-off far beyond just nuclear physics. After a summary of the current status in the field, I will also take a look at the future: Where will we stand 50 years from now? Will there ever be closure? [Preview Abstract] |
Monday, January 30, 2017 11:21AM - 11:57AM |
R15.00002: (Im)precise nuclear forces: From experiment to model Invited Speaker: Rodrigo Navarro Perez The nuclear force is the most fundamental building block in nuclear science. It is the cornerstone of every nuclear application from nuclear reactors to the production of heavy elements in supernovae. Despite being rigorously derived from the Standard Model, the actual determination of the nuclear force requires adjusting a set of parameters to reproduce experimental data. This introduces uncertainties that need to be quantified and propagated into all nuclear applications. I'll review a series of works on the determination of the Nucleon-Nucleon interaction from a collection of over 8000 elastic scattering data. Statistical tools used on the selection of data and the propagation of statistical uncertainties will be presented. The implications for charge independence of the pion-nucleon coupling constant and the predictive power of chiral interactions will be discussed. Although this is not the final word on theoretical nuclear uncertainties, as other sources of errors should be explored, this series of works allow to set the foundations for a new era for uncertainty quantification in nuclear applications. [Preview Abstract] |
Monday, January 30, 2017 11:57AM - 12:33PM |
R15.00003: Local chiral potentials with $\Delta$-intermediate states and the structure of light nuclei Invited Speaker: Maria Piarulli We present a fully local nucleon-nucleon potential in chiral effective field theory ($\chi$EFT) retaining pions, nucleons and $\Delta$-isobars as explicit degrees of freedom, and use it in hypersperical-harmonics and quantum Monte Carlo calculations of ground and excited states of $^3$H, $^3$He, $^4$He, $^6$He, and $^6$Li nuclei. The calculation of the potential is carried out by including one- and two-pion-exchange contributions up to next-to-next-to-leading order (N2LO) and contact interactions up to next-to-next-to-next-to-leading order (N3LO). The low-energy constants multiplying these contact interactions are fitted to the 2013 Granada database in two different ranges of laboratory energies, either 0--125 MeV or 0--200 MeV, and to the deuteron binding energy and $nn$ singlet scattering length. Fits to these data are performed for three models characterized by long- and short-range cutoffs, $R_{\rm L}$ and $R_{\rm S}$ respectively, ranging from $(R_{\rm L},R_{\rm S})=(1.2,0.8)$ fm down to $(0.8,0.6)$ fm. The long-range (short-range) cutoff regularizes the one- and two-pion exchange (contact) part of the potential. [Preview Abstract] |
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