Contessi, Lorenzo (2017) *Pionless Effective Field Theory: Building the Bridge Between Lattice Quantum Chromodynamics and Nuclear Physics.* PhD thesis, University of Trento.

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## Abstract

We analyze ground state properties of few-nucleons systems and $^{16}$O using \eftnopi (Pionless Effective Field Theory) at \ac{LO}. This is the first time the theory is extended to many-body nuclear systems. The free constants of the interaction are fitted using both experimental data and \ac{LQCD} results. The nuclear many-body Schr\"odinger equation is solved by means of the Auxiliary Field Diffusion Monte Carlo method. A linear optimization procedure has been used to recover the correct structure of the ground state wavefunction. {\eftnopi} as revealed to be an appropriate theory to describe light nuclei both in nature, and in the case where heavier quarks are used in order to make \ac{LQCD} calculation feasible. Our results are in good agreement with experiments and \ac{LQCD} predictions. In our \ac{LO} calculation, $^{16}$O appears to be unstable against breakup into four $^4$He for the quark masses considered.

Item Type: | Doctoral Thesis (PhD) |
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Doctoral School: | Physics |

PhD Cycle: | 29 |

Subjects: | Area 02 - Scienze fisiche > FIS/02 FISICA TEORICA, MODELLI E METODI MATEMATICI Area 02 - Scienze fisiche > FIS/04 FISICA NUCLEARE E SUBNUCLEARE |

Repository Staff approval on: | 08 Jun 2017 09:31 |

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