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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/LM2018104" target="_blank" >LM2018104: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

NATURE PHYSICS

ISSN

1745-2473

e-ISSN

1745-2481

Svazek periodika

19

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

61-71

Kód UT WoS článku

001031009800007

EID výsledku v databázi Scopus

2-s2.0-85143911914