Strangeness in nuclei and neutron stars: A challenging puzzle

Lonardoni, Diego; Lovato, Alessandro; Gandolfi, Stefano; Pederiva, Francesco

doi:10.1051/epjconf/201611307006

Title: Strangeness in nuclei and neutron stars: A challenging puzzle

Full Record
Other Related Research

Abstract

The prediction of neutron stars properties is strictly connected to the employed nuclear interactions. The appearance of hyperons in the inner core of the star is strongly dependent on the details of the underlying hypernuclear force. Here, we summarize our recent quantum Monte Carlo results on the development of realistic two- and threebody hyperon-nucleon interactions based on the available experimental data for light- and medium-heavy hypernuclei.

Authors:

Lonardoni, Diego ^[1]; Lovato, Alessandro ^[2]; Gandolfi, Stefano ^[2]; Pederiva, Francesco ^[3]

Argonne National Lab. (ANL), Lemont, IL (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Trento, Trento (Italy); INFN-Trento Institute for Fundamental Physics and Application, Trento (Italy)

Publication Date:: Fri Mar 25 00:00:00 EDT 2016

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1329900

Report Number(s):: LA-UR-15-26432
Journal ID: ISSN 2100-014X

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: EPJ Web of Conferences

Additional Journal Information:: Journal Volume: 113; Journal ID: ISSN 2100-014X

Publisher:: EDP Sciences

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; atomic and nuclear physics

Citation Formats


                    Lonardoni, Diego, Lovato, Alessandro, Gandolfi, Stefano, and Pederiva, Francesco. Strangeness in nuclei and neutron stars: A challenging puzzle.  United States: N. p., 2016. 
Web.  doi:10.1051/epjconf/201611307006.

Copy to clipboard


                    Lonardoni, Diego, Lovato, Alessandro, Gandolfi, Stefano, & Pederiva, Francesco. Strangeness in nuclei and neutron stars: A challenging puzzle.  United States.  https://doi.org/10.1051/epjconf/201611307006

Copy to clipboard


                    Lonardoni, Diego, Lovato, Alessandro, Gandolfi, Stefano, and Pederiva, Francesco. Fri .  
"Strangeness in nuclei and neutron stars: A challenging puzzle".  United States.  https://doi.org/10.1051/epjconf/201611307006.  https://www.osti.gov/servlets/purl/1329900.

Copy to clipboard


                    
@article{osti_1329900,

  title        = {Strangeness in nuclei and neutron stars: A challenging puzzle},

  author       = {Lonardoni, Diego and Lovato, Alessandro and Gandolfi, Stefano and Pederiva, Francesco},

  abstractNote = {The prediction of neutron stars properties is strictly connected to the employed nuclear interactions. The appearance of hyperons in the inner core of the star is strongly dependent on the details of the underlying hypernuclear force. Here, we summarize our recent quantum Monte Carlo results on the development of realistic two- and threebody hyperon-nucleon interactions based on the available experimental data for light- and medium-heavy hypernuclei.},

  doi          = {10.1051/epjconf/201611307006},

  journal      = {EPJ Web of Conferences},

  number       = ,

  volume       = 113,

  place        = {United States},

  year         = {Fri Mar 25 00:00:00 EDT 2016},

  month        = {Fri Mar 25 00:00:00 EDT 2016}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1051/epjconf/201611307006

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 1 work

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Similar Records in DOE PAGES and OSTI.GOV collections:

The EOS of Neutron Matter and the Effect of Λ Hyperons to Neutron Star Structure

Journal Article Gandolfi, Stefano ; Lonardoni, Diego - JPS Conference Proceedings

The structure of neutron stars is determined by the equation of state of the matter inside the star, which relies on the knowledge of nuclear interactions. While radii of neutron stars mostly depend on the equation of state of neutron matter at nuclear densities, their maximum mass can be drastically affected by the appearance of hyperons at higher densities in the inner core of the star. We summarize recent quantum Monte Carlo results on the calculation of the equation of state of neutron matter at nuclear and higher densities. We report about the development of realistic hyperon-nucleon interactions based onmore »« less
https://doi.org/10.7566/JPSCP.17.101001

Full Text Available
Impurity lattice Monte Carlo for hypernuclei

Journal Article Frame, Dillon ; Lähde, Timo A. ; Lee, Dean ; ... - European Physical Journal. A

Absmore »« less
https://doi.org/10.1140/epja/s10050-020-00257-y
Hyperon Puzzle: Hints from Quantum Monte Carlo Calculations

Journal Article Lonardoni, Diego ; Lovato, Alessandro ; Gandolfi, Stefano ; ... - Physical Review Letters

The onset of hyperons in the core of neutron stars and the consequent softening of the equation of state have been questioned for a long time. Controversial theoretical predictions and recent astrophysical observations of neutron stars are the grounds for the so-called hyperon puzzle. We calculate the equation of state and the neutron star mass-radius relation of an infinite systems of neutrons and. particles by using the auxiliary field diffusion Monte Carlo algorithm. We find that the three-body hyperon-nucleon interaction plays a fundamental role in the softening of the equation of state and for the consequent reduction of the predictedmore »« less
https://doi.org/10.1103/PhysRevLett.114.092301
Benchmark results for few-body hypernuclei

Journal Article Ruffino, Fabrizio Ferrari ; Lonardoni, Diego ; Barnea, Nir ; ... - Few-Body Systems

The Non-Symmetrized Hyperspherical Harmonics method (NSHH) is introduced in the hypernuclear sector and benchmarked with three different ab-initio methods, namely the Auxiliary Field Diffusion Monte Carlo method, the Faddeev-Yakubovsky approach and the Gaussian Expansion Method. Binding energies and hyperon separation energies of three- to five-body hypernuclei are calculated by employing the two-body Λ N component of the phenomenological Bodmer-Usmani potential, and a hyperon-nucleon interaction simulating the scattering phase shifts given by NSC97f. The range of applicability of the NSHH method is briefly discussed.
Cited by 6
https://doi.org/10.1007/s00601-017-1273-7

Full Text Available
Spectroscopy of the hypernuclei /sub. lambda. //sup 13/C, /sub. lambda. //sup 14/N, and /sub. lambda. //sup 18/O with the (K,. pi. ) strangeness exchange reaction

Thesis/Dissertation Bart, S M

Levels in the hypernuclei /sub ..lambda..//sup 13/C, /sub ..lambda..//sup 14/N, and /sub ..lambda..//sup 18/O have been observed at the Brookhaven National Laboratory Alternating Gradient Synchrotron. Study of such non closed shell hypernuclei represents a deviation from previous hypernuclear experiments which focused on even-even target nuceli. The hypernuclei were created with 800 MeV/c kaons in the (K/sup -/,..pi../sup -/) strangeness exchange reaction with scattering angles from 0/sup 0/ to 25/sup 0/, corresponding to momentum transfers from 50 to 330 MeV/c. The case of /sub ..lambda..//sup 13/C is a unique measurement which used an isotopically enriched benzene scintillator as the target. Themore »« less

Similar Records