Nuclear physics uncertainties in light hypernuclei

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F22%3A00565015" target="_blank" >RIV/61389005:_____/22:00565015 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevC.106.054001" target="_blank" >https://doi.org/10.1103/PhysRevC.106.054001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.106.054001" target="_blank" >10.1103/PhysRevC.106.054001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nuclear physics uncertainties in light hypernuclei

Popis výsledku v původním jazyce

The energy levels of light hypernuclei are experimentally accessible observables that contain valuable information about the interaction between hyperons and nucleons. In this work we study strangeness S = -1 systems H-3,4(Lambda) and He-4,5(Lambda) using the ab initio no-core shell model (NCSM) with realistic interactions obtained from chiral effective field theory (chi EFT). In particular, we quantify the finite precision of theoretical predictions that can be attributed to nuclear physics uncertainties. We study both the convergence of the solution of the many-body problem (method uncertainty) and the regulator and calibration-data dependence of the nuclear chi EFT Hamiltonian (model uncertainty). For the former, we implement infrared correction formulas and extrapolate finite-space NCSM results to infinite model space. We then use Bayesian parameter estimation to quantify the resulting method uncertainties. For the latter, we employ a family of 42 realistic Hamiltonians and measure the standard deviation of predictions while keeping the leading-order hyperon-nucleon interaction fixed. Following this procedure we find that model uncertainties of ground-state Lambda separation energies amount to approximate to 20 (100) keV in H-3(Lambda) (H-4(Lambda), He) and approximate to 400 keV in He-5(Lambda). Method uncertainties are comparable in magnitude for the H-4(Lambda), He 1(+) excited states and He-5(Lambda), which are computed in limited model spaces, but otherwise are much smaller. This knowledge of expected theoretical precision is crucial for the use of binding energies of light hypernuclei to infer the elusive hyperon-nucleon interaction.

Název v anglickém jazyce

Nuclear physics uncertainties in light hypernuclei

Popis výsledku anglicky

The energy levels of light hypernuclei are experimentally accessible observables that contain valuable information about the interaction between hyperons and nucleons. In this work we study strangeness S = -1 systems H-3,4(Lambda) and He-4,5(Lambda) using the ab initio no-core shell model (NCSM) with realistic interactions obtained from chiral effective field theory (chi EFT). In particular, we quantify the finite precision of theoretical predictions that can be attributed to nuclear physics uncertainties. We study both the convergence of the solution of the many-body problem (method uncertainty) and the regulator and calibration-data dependence of the nuclear chi EFT Hamiltonian (model uncertainty). For the former, we implement infrared correction formulas and extrapolate finite-space NCSM results to infinite model space. We then use Bayesian parameter estimation to quantify the resulting method uncertainties. For the latter, we employ a family of 42 realistic Hamiltonians and measure the standard deviation of predictions while keeping the leading-order hyperon-nucleon interaction fixed. Following this procedure we find that model uncertainties of ground-state Lambda separation energies amount to approximate to 20 (100) keV in H-3(Lambda) (H-4(Lambda), He) and approximate to 400 keV in He-5(Lambda). Method uncertainties are comparable in magnitude for the H-4(Lambda), He 1(+) excited states and He-5(Lambda), which are computed in limited model spaces, but otherwise are much smaller. This knowledge of expected theoretical precision is crucial for the use of binding energies of light hypernuclei to infer the elusive hyperon-nucleon interaction.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review C

ISSN

2469-9985

e-ISSN

2469-9993

Svazek periodika

106

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

054001

Kód UT WoS článku

000887074200001

EID výsledku v databázi Scopus

2-s2.0-85142069846