OKA (Russian: ОКА — Опыты с КАонами, literal translation "Observations of KAons") is a particle physics detector experiment at the U-70 accelerator in the Institute for High Energy Physics located in Protvino near Moscow (Russia). OKA is specialized experiment with separated charge kaons beam.
Superconducting high radio-frequency separator produces a beam of charged kaons intensity (4 ÷ 6) · 106 K for a cycle with momenta 12.5 and 18 GeV.[1] Experimental complex includes the decay volume with veto system, the wide-aperture magnetic spectrometer consists of a set of proportional chambers, straw tubes, drift tubes and hodoscope, the Cherenkov counters for charged particle identification, the electromagnetic calorimeter known as GAMS-2000 detector, the total absorption hadron calorimeter and the muon counters.[2]
The research program of the experiment has the following items:[3]
- Search for new physics beyond the Standard Model - the new (pseudo)scalar and tensor interactions in the weak leptonic and semi-leptonic decays of K-mesons and other deviations from the V – A theory.
- Search the effects of direct CP-violation in the decays of K±-mesons.
- The study of hadron interactions – chiral perturbation theory, lattice QCD, dispersion sum rules and so on.
- Hadron spectroscopy.
- Coulomb processes in kaon-nucleon and pion-nucleon interactions.
The sensitivity of the OKA experiment will enable to observe decays with branching fractions of about 10−8.
References
edit- ^ CERN Courier article
- ^ Kurshetsov (2009). "Status of "OKA" experiment". Proceedings of 2009 KAON International Conference: 3–4. Bibcode:2009kaon.confE..51K.
- ^ Obraztsov; Landsberg (2001). "Prospects for CP-violation searches in the future experiment with RF separated K± beam at U-70". Nucl. Phys. B Proc. Suppl. 99B (3): 257–264. arXiv:hep-ex/0011033. Bibcode:2001NuPhS..99..257O. doi:10.1016/S0920-5632(01)01385-8.
External links
edit- "OKA Official Webpage"
- "ОКА at Website of IHEP" (in Russian). Retrieved 8 December 2014.
- OKA experiment record on INSPIRE-HEP