Anomaly in the decay of Be-8 and He-4-can an observed light boson mediate low-energy nucleon-nucleon interactions?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F21%3A00355277" target="_blank" >RIV/68407700:21670/21:00355277 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1361-6471/ac09db" target="_blank" >https://doi.org/10.1088/1361-6471/ac09db</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6471/ac09db" target="_blank" >10.1088/1361-6471/ac09db</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Anomaly in the decay of Be-8 and He-4-can an observed light boson mediate low-energy nucleon-nucleon interactions?

Popis výsledku v původním jazyce

We present a hypothesis that the reported anomaly in the folding angle distribution of electron-positron pairs, emitted in the decay of the excited levels of nucleus Be-8 and He-4, can be related to the cluster structure of the decaying state. In particular, we suggest that the potentially reported boson with rest mass m ( X ) = 17 MeV can mediate the nucleon-nucleon interaction at the low-energy regime of QCD, in the weakly bound cluster state p + Li-7, and p + H-3. We explore possible equations of state of symmetric nuclear matter, corresponding to the vector meson mass m (v) = 17 MeV, obtained using relativistic mean field theory of nuclear force using QHD-I. We find several relations for boson masses, based on concepts of chiral symmetry breaking. Both model approaches thus point toward apparent restoration of chiral symmetry in nucleon-nucleon interaction at large distances, possibly via bounce into a false instanton vacuum. The possible existence of a boson with rest mass m ( X ) = 17 MeV in the decay of high lying excited states of Be-8 and He-4 could shed new light in one of the long-lasting open questions in nuclear physics.

Název v anglickém jazyce

Anomaly in the decay of Be-8 and He-4-can an observed light boson mediate low-energy nucleon-nucleon interactions?

Popis výsledku anglicky

We present a hypothesis that the reported anomaly in the folding angle distribution of electron-positron pairs, emitted in the decay of the excited levels of nucleus Be-8 and He-4, can be related to the cluster structure of the decaying state. In particular, we suggest that the potentially reported boson with rest mass m ( X ) = 17 MeV can mediate the nucleon-nucleon interaction at the low-energy regime of QCD, in the weakly bound cluster state p + Li-7, and p + H-3. We explore possible equations of state of symmetric nuclear matter, corresponding to the vector meson mass m (v) = 17 MeV, obtained using relativistic mean field theory of nuclear force using QHD-I. We find several relations for boson masses, based on concepts of chiral symmetry breaking. Both model approaches thus point toward apparent restoration of chiral symmetry in nucleon-nucleon interaction at large distances, possibly via bounce into a false instanton vacuum. The possible existence of a boson with rest mass m ( X ) = 17 MeV in the decay of high lying excited states of Be-8 and He-4 could shed new light in one of the long-lasting open questions in nuclear physics.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Physics G: Nuclear and Particle Physics

ISSN

0954-3899

e-ISSN

1361-6471

Svazek periodika

48

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

000695274300001

EID výsledku v databázi Scopus

2-s2.0-85110513827