An Helium calorimeter for Anti-Deuteron identification in cosmic rays

Nozzoli, F.; Dimiccoli, F.; Iuppa, R.; Zuccon, P.

doi:10.22323/1.395.0052

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021) 2021

DOI: 10.22323/1.395.0052

|View full text |Cite

An Helium calorimeter for Anti-Deuteron identification in cosmic rays

F. Nozzoli¹,

F. Dimiccoli²,

R. Iuppa³

et al.

Abstract: The observation of sub-GeV antideuteron in the cosmic ray ux could be a very strong signature of dark matter annihilation in our galaxy. The goal of the Anti Deuteron Helium Detector (ADHD) project is to study the signatures oered by an high pressure Helium calorimeter for the identication of antideuterons in space. The performance of an high pressure (200 bar) Helium scintillator prototype, capable of fast timing, will be shown.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2022

Publication Types

Select...

Article1

Relationship

Self Cite0

Independent1

Authors

Journals

Cited by 1 publication

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

High-resolution laser resonances of antiprotonic helium in superfluid 4He

Sótér

Aghai-Khozani

Barna

et al. 2022

Nature

View full text Add to dashboard Cite

When atoms are placed into liquids, their optical spectral lines corresponding to the electronic transitions are greatly broadened compared to those of single, isolated atoms. This linewidth increase can often reach a factor of more than a million, obscuring spectroscopic structures and preventing high-resolution spectroscopy, even when superfluid helium, which is the most transparent, cold and chemically inert liquid, is used as the host material1–6. Here we show that when an exotic helium atom with a constituent antiproton7–9 is embedded into superfluid helium, its visible-wavelength spectral line retains a sub-gigahertz linewidth. An abrupt reduction in the linewidth of the antiprotonic laser resonance was observed when the liquid surrounding the atom transitioned into the superfluid phase. This resolved the hyperfine structure arising from the spin–spin interaction between the electron and antiproton with a relative spectral resolution of two parts in 106, even though the antiprotonic helium resided in a dense matrix of normal matter atoms. The electron shell of the antiprotonic atom retains a small radius of approximately 40 picometres during the laser excitation7. This implies that other helium atoms containing antinuclei, as well as negatively charged mesons and hyperons that include strange quarks formed in superfluid helium, may be studied by laser spectroscopy with a high spectral resolution, enabling the determination of the particle masses9. The sharp spectral lines may enable the detection of cosmic-ray antiprotons10,11 or searches for antideuterons12 that come to rest in liquid helium targets.

show abstract

High-resolution laser resonances of antiprotonic helium in superfluid 4He

Sótér

Aghai-Khozani

Barna

et al. 2022

Nature

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

An Helium calorimeter for Anti-Deuteron identification in cosmic rays

Cited by 1 publication

References 9 publications

High-resolution laser resonances of antiprotonic helium in superfluid 4He

High-resolution laser resonances of antiprotonic helium in superfluid 4He

Contact Info

Product

Resources

About