Spin correlations of strongly interacting massive fermion pairs as a test of Bell's inequality

H. Sakai, T. Saito, T. Ikeda, K. Itoh, T. Kawabata, H. Kuboki, Y. Maeda, N. Matsui, C. Rangacharyulu, M. Sasano, Y. Satou, K. Sekiguchi, K. Suda, A. Tamii, T. Uesaka, K. Yako

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Abstract

We report the results of the first-time test of the local hidden variable theories (Bell-Clauser-Horne-Shimony-Holt) involving strongly interacting pairs of massive spin 1/2 hadrons from the decay of short-lived (τ<10-21sec ) He2 spin-singlet state, populated in the nuclear reaction H2+H1→He2+n. The novel features of this experiment are (a) the use of an "event body" detector of nearly 100% efficiency to prepare an unbiased sample and (b) a focal-plane polarimeter of full 2πsr acceptance with a random "post selection" of the reference axes. The spin-correlation function is deduced to be Sexp (π/4)=2.83±0.24stat±0.07sys. This result is in agreement with nonlocal quantum mechanical prediction and it violates the Bell-CHSH inequality of |S|≤2 at a confidence level of 99.3%.

Original languageEnglish
Article number150405
JournalPhysical review letters
Volume97
Issue number15
DOIs
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Sakai, H., Saito, T., Ikeda, T., Itoh, K., Kawabata, T., Kuboki, H., Maeda, Y., Matsui, N., Rangacharyulu, C., Sasano, M., Satou, Y., Sekiguchi, K., Suda, K., Tamii, A., Uesaka, T., & Yako, K. (2006). Spin correlations of strongly interacting massive fermion pairs as a test of Bell's inequality. Physical review letters, 97(15), [150405]. https://doi.org/10.1103/PhysRevLett.97.150405