Physics:WA89 experiment
The WA89 experiment (Omega/Hyperon) was a particle physics experiment operating from 1989 to 1994 in the West Area of the SPS accelerator at CERN.[1][2] It was a large acceptance forward spectrometer dedicated to the spectroscopy of charmed strange baryons and exotic multiquark states produced by a hyperon beam.
The initial aims of the hyperon beam experiment were to investigate charmed-strange quark baryons, verify and investigate the U(3100) and study baryonic resonances and decays whilst searching for the double-strange dibaryon H.[3]
Experimental setup
The WA89 experiment consisted of a beamline and a forward spectrometer. The beamline contained the proton beam hitting the hyperon production target which was followed by a 13 m long hyperon channel. Three dipoles were used to provide a bending power of 8.4 Tm. The target region consisted of two adjacent targets surrounded by muon strip detectors. Following this, a 15 m long Λ decay region was filled with six drift chamber sets and a spectrometer magnet.[4]
The beam particle trajectories along with their momenta were measured with a scintillating fibre hodoscope in the beamline and a silicon microstrip detector at the end of the line.[1]
References
- ↑ 1.0 1.1 Alexandrov, Yu. A; Clement, M; Dropmann, F; Fournier, A; Grafström, P; Hubbard, E; Paul, S; Siebert, H. W et al. (1998-05-11). "The high-intensity hyperon beam at CERN" (in en). Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 408 (2): 359–372. doi:10.1016/S0168-9002(98)00228-9. ISSN 0168-9002. https://www.sciencedirect.com/science/article/pii/S0168900298002289.
- ↑ "Experiments at CERN: WA89/Omega/Hyperon—Hyperon beam experiment". https://greybook.cern.ch/greybook/experiment/detail?id=WA89.
- ↑ Forino, A; Gessaroli, R; Quareni-Vignudelli, A; Viaggi, F; Barberis, D (1987). "Proposal for a new hyperon beam experiment at the CERN-SPS using the Omega facility". CERN. Geneva. SPS Experiments Committee. https://cds.cern.ch/record/301194?ln=en.
- ↑ Paul, S. (1989). "1. The new hyperon beam experiment at CERN". AIP Conference Proceedings (AIP) 196: 280–284. doi:10.1063/1.38934. https://doi.org/10.1063/1.38934.
External links
CERN-WA-089 experiment record on INSPIRE-HEP
CERN Grey Book for WA89 experiment
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