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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10304 - Nuclear physics

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

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

Name of the periodical

Journal of Physics G: Nuclear and Particle Physics

ISSN

0954-3899

e-ISSN

1361-6471

Volume of the periodical

48

Issue of the periodical within the volume

10

Country of publishing house

GB - UNITED KINGDOM

Number of pages

9

Pages from-to

1-9

UT code for WoS article

000695274300001

EID of the result in the Scopus database

2-s2.0-85110513827