Dimuonium is an exotic atom , the bound state of the positive and negative muons μ + μ - . Dimuonium [1] or true muonium should not be confused with the muonium atom μ + e - . Until now, dimuonium has not been experimentally observed, although a number of experiments are planned to observe it and study properties, including at colliders [2] [3] .
Dimuonium Search Experiments
There are several dumuonium search experiments [4] . One of them is the μμ-tron experiment (“Myumyutron”), planned at the G. I. Budker Institute of Nuclear Physics SB RAS , which has been under development since 2017 . In the experiment, it is supposed to create a special electron - positron collider for low energies, which will make it possible to observe the production of dimuonium in collisions of electron and positron beams with an intersection angle of 75 ° with energies of 408 MeV . Thus, the invariant mass of the colliding particles will be equal to twice the mass of the muon (m μ = 105.658 MeV). To register dimuonium (in the decay channel into an electron-positron pair), it is proposed to create a specialized detector . In addition to the actual registration of dimuonium, it is planned to isolate its various states and measure their lifetimes. In addition to experiments in the field of particle physics, the collider created as part of the experiment is also of interest from the point of view of developing accelerator technologies for the Super Charm Tau factory planned at INP SB RAS. The experiment was proposed in 2017 by the staff of the INP SB RAS E. B. Levichev , A. I. Milshtein and V. P. Druzhinin .
See also
- Muonium
- Positronium
Notes
- ↑ S.G. Karshenboim, V.G. Ivanov, U.D. Jentshura, G. Zoff, Bound states of the muon-antimuon system: lifetimes and hyperfine splitting , JETP, 1998, Volume 113, Issue 2, pp. 409-431.
- ↑ SJ Brodsky, RF Lebed. Production of the smallest QED atom: True muonium ( µ ⁺ µ ⁻) (Eng.) // Physical Review Letters : journal. - 2009. - Vol. 102 , no. 21 . - P. 213401 . - DOI : 10.1103 / PhysRevLett.102.213401 . - . - arXiv : 0904.2225 .
- ↑ H. Lamm, RF Lebed (2013), "True Muonium (µ⁺µ⁻) on the Light Front: A Toy Model", arΧiv : 1311.3245
- ↑ Predicting and Discovering True Muonium
- ↑ Low-energy electron-positron collider to search and study (µ⁺µ⁻) bound state. AV Bogomyagkov, VP Druzhinin, EB Levichev, AI Milstein, SV Sinyatkin. BINP, Novosibirsk.