Measurement of anti-He-3 nuclei absorption in matter and impact on their propagation in the Galaxy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F23%3A00367692" target="_blank" >RIV/68407700:21340/23:00367692 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1038/s41567-022-01804-8" target="_blank" >https://doi.org/10.1038/s41567-022-01804-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41567-022-01804-8" target="_blank" >10.1038/s41567-022-01804-8</a>

Result language

angličtina

Original language name

Measurement of anti-He-3 nuclei absorption in matter and impact on their propagation in the Galaxy

Original language description

In our Galaxy, light antinuclei composed of antiprotons and antineutrons can be produced through high-energy cosmic-ray collisions with the interstellar medium or could also originate from the annihilation of dark-matter particles that have not yet been discovered. On Earth, the only way to produce and study antinuclei with high precision is to create them at high-energy particle accelerators. Although the properties of elementary antiparticles have been studied in detail, the knowledge of the interaction of light antinuclei with matter is limited. We determine the disappearance probability of (3)(He) over bar when it encounters matter particles and annihilates or disintegrates within the ALICE detector at the Large Hadron Collider. We extract the inelastic interaction cross section, which is then used as an input to the calculations of the transparency of our Galaxy to the propagation of (3)(He) over bar stemming from dark-matter annihilation and cosmic-ray interactions within the interstellar medium. For a specific dark-matter profile, we estimate a transparency of about 50%, whereas it varies with increasing (3)(He) over bar momentum from 25% to 90% for cosmic-ray sources. The results indicate that (3)(He) over bar nuclei can travel long distances in the Galaxy, and can be used to study cosmic-ray interactions and dark-matter annihilation.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10303 - Particles and field physics

Project

<a href="/en/project/LM2018104" target="_blank" >LM2018104: Research Infrastructure for experiments at CERN</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

NATURE PHYSICS

ISSN

1745-2473

e-ISSN

1745-2481

Volume of the periodical

19

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

61-71

UT code for WoS article

001031009800007

EID of the result in the Scopus database

2-s2.0-85143911914