| Article | |
| Title | Laser spectroscopy of long-lived antiprotonic and pionic helium in superfluid helium |
| Author(s) | Hori, M (Mainz U. ; Munich, Max Planck Inst. Quantenopt.) ; Aghai-Khozani, H (Mainz U.) ; Sótér, A (Mainz U.) ; Dax, A (PSI, Villigen) ; Barna, D (CERN) ; Venturelli𝑒, L (INFN, Pavia ; Brescia U.) |
| Publication | 2022 |
| Number of pages | 6 |
| In: | PoS ICHEP2022pp.141 |
| In: | 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.141 |
| DOI | 10.22323/1.414.0141 |
| Subject category | Particle Physics - Phenomenology |
| Abstract | The PiHe collaboration of PSI recently carried out laser spectroscopy of an infrared transition in three-body pionic helium atoms that were synthesized in a superfluid (He-II) helium target. Analogous measurements of antiprotonic helium atoms embedded in liquid helium were carried out by the ASACUSA collaboration of CERN. Spectral lines of unexpectedly narrow, sub-gigahertz linewidth were revealed in the antiproton case. An abrupt reduction in the linewidth was observed when the liquid helium (He-I) surrounding the atom transitioned into the superfluid phase. |
| Copyright/License | © 2023-2025 The author(s) (License: CC-BY-NC-ND-4.0) |
Corresponding record in: Inspire
Rekord stworzony 2023-09-06, ostatnia modyfikacja 2023-09-06
