HyperCP: A high-rate spectrometer for the study of charged hyperon and kaon decays

HyperCP collaboration; R. A. Burnstein; A. Chakravorty; A. Chan; Y. C. Chen; W. -S. Choong; K. Clark; E. C. Dukes; C. Durandet; J. Felix; R. Fuzesy; G. Gidal; P. Gu; H. R. Gustafson; C. Ho; T. Holmstrom; M. Huang; C. James; C. M. Jenkins; T. D. Jones; D. M. Kaplan; L. M. Lederman; N. Leros; M. J. Longo; F. Lopez; L. C. Lu; W. Luebke; K. -B. Luk; K. S. Nelson; H. K. Park; J. -P. Perroud; D. Rajaram; H. A. Rubin; P. K. Teng; B. Turko; J. Volk; C. G. White; S. L. White; P. Zyla

doi:10.1016/j.nima.2004.12.031

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HyperCP: A high-rate spectrometer for the study of charged hyperon and kaon decays

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Abstract

The HyperCP experiment (Fermilab E871) was designed to search for rare phenomena in the decays of charged strange particles, in particular CP violation in $Ξ$ and $Λ$ hyperon decays with a sensitivity of $10^{-4}$. Intense charged secondary beams were produced by 800 GeV/c protons and momentum-selected by a magnetic channel. Decay products were detected in a large-acceptance, high-rate magnetic spectrometer using multiwire proportional chambers, trigger hodoscopes, a hadronic calorimeter, and a muon-detection system. Nearly identical acceptances and efficiencies for hyperons and antihyperons decaying within an evacuated volume were achieved by reversing the polarities of the channel and spectrometer magnets. A high-rate data-acquisition system enabled 231 billion events to be recorded in twelve months of data-taking.

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HyperCP collaboration, R. A. Burnstein, A. Chakravorty, A. Chan, Y. C. Chen, W. -S. Choong, K. Clark, E. C. Dukes, C. Durandet, J. Felix, R. Fuzesy, G. Gidal, P. Gu, H. R. Gustafson, C. Ho, T. Holmstrom, M. Huang, C. James, C. M. Jenkins, T. D. Jones, D. M. Kaplan, L. M. Lederman, N. Leros, M. J. Longo, F. Lopez, L. C. Lu, W. Luebke, K. -B. Luk, K. S. Nelson, H. K. Park, J. -P. Perroud, D. Rajaram, H. A. Rubin, P. K. Teng, B. Turko, J. Volk, C. G. White, S. L. White, P. Zyla. 2004-05-14. HyperCP: A high-rate spectrometer for the study of charged hyperon and kaon decays. https://doi.org/10.1016/j.nima.2004.12.031

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