Positronium microwave spectroscopy using Ramsey interferometry

Babij, T. J.; Cassidy, D. B.

doi:10.1140/epjd/s10053-022-00448-w

Cited by 3 publications

(1 citation statement)

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“…Theory and experiment well match each other (within two standard deviations) which allows testing QED corrections up to the order of mα 6 . There are ongoing efforts to improve the experimental results of Ps spectroscopy [40,41], including 1S-2S frequency interval [42].…”

Section: Positroniummentioning

confidence: 99%

Antihydrogen and Hydrogen: Search for the Difference

Khabarova,

Golovizin,

Kolachevsky

2023

Symmetry

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Our universe consists mainly of regular matter, while the amount of antimatter seems to be negligible. The origin of this difference, known as the baryon asymmetry, remains undiscovered. Since the discovery of antimatter, many experiments have been carried out to study antiparticles and to compare matter and antimatter twins. Two of the most sensitive methods in physics, radiofrequency and optical spectroscopy, can be efficiently used to search for the difference. The successful synthesis and trapping of cold antihydrogen atoms opened the possibility of significantly increasing the sensitivity of matter/antimatter tests. This brief review focuses on a hydrogen/antihydrogen comparison using other independent spectroscopic measurements of single particles in traps and other simple atomic systems like positronium. Although no significant difference is detected in today’s level of accuracy, one can push forward the sensitivity by improving the accuracy of 1S–2S positronium spectroscopy, spectroscopy of hyperfine transition in antihydrogen, and gravitational measurements.

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Section: Positroniummentioning

confidence: 99%

Antihydrogen and Hydrogen: Search for the Difference

Khabarova,

Golovizin,

Kolachevsky

2023

Symmetry

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An energy tunable continuous 23S1 positronium beam

Newson,

Babij,

Cassidy

2023

Review of Scientific Instruments

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We describe the experimental production of a beam of 23S1 positronium (Ps) atoms obtained from charge-exchange collisions between a positron beam and Xe held in a gas cell. The angular divergence of the emitted Ps beam was recorded using two position sensitive detectors located at different distances from the gas cell. The fraction of the Ps beam produced in the 23S1 level was measured via the change in the Ps count rate after driving the 23S1 → 23P2 transition with microwave radiation; with optimal experimental parameters, we estimate that up to 10% of the Ps beam is formed in the 23S1 state. The measured properties of the beam were used to evaluate the feasibility of using the system for precision spectroscopy of the n = 2 Ps fine structure using Ramsey interferometry.

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Precision Microwave Spectroscopy of the Positronium 2 S31→2
Sheldon¹,
Babij²,
Reeder³
et al. 2023
Phys. Rev. Lett.
6
0
0
0
1
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Positronium microwave spectroscopy using Ramsey interferometry

Abstract: We describe an experimental arrangement suitable for performing microwave spectroscopy measurements of the positronium (Ps) $$n=2$$ n = 2 fine structure using Ramsey interferometry. Simulations are presented concerning the production of energetic $$2\,^3S_1$$ 2 3 … Show more

Cited by 3 publications

References 50 publications

Antihydrogen and Hydrogen: Search for the Difference

Antihydrogen and Hydrogen: Search for the Difference

An energy tunable continuous 23S1 positronium beam

Precision Microwave Spectroscopy of the Positronium 2 S31→2
Sheldon¹,
Babij²,
Reeder³
et al. 2023
Phys. Rev. Lett.
6
0
0
0
1
View full text Add to dashboard Cite

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Positronium microwave spectroscopy using Ramsey interferometry

Abstract: We describe an experimental arrangement suitable for performing microwave spectroscopy measurements of the positronium (Ps) $$n=2$$ n = 2 fine structure using Ramsey interferometry. Simulations are presented concerning the production of energetic $$2\,^3S_1$$ 2 3 … Show more

Cited by 3 publications

References 50 publications

Antihydrogen and Hydrogen: Search for the Difference

Antihydrogen and Hydrogen: Search for the Difference

An energy tunable continuous 23S1 positronium beam

Precision Microwave Spectroscopy of the Positronium 2 S31→2 Sheldon1, Babij2, Reeder3 et al. 2023Phys. Rev. Lett.60001View full textAdd to dashboardCite

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Precision Microwave Spectroscopy of the Positronium 2 S31→2
Sheldon¹,
Babij²,
Reeder³
et al. 2023
Phys. Rev. Lett.
6
0
0
0
1
View full text Add to dashboard Cite