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Particle physics

Let it B


A phenomenon known as CP asymmetry, which explains our very existence, has been observed in the decays of Bs0 mesonic particles. The finding represents yet another triumph of the standard model of particle physics.

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  1. Aaij, R. et al. Phys. Rev. Lett. 110, 221601 (2013).

    Article  ADS  CAS  Google Scholar 

  2. Kobayashi, M. & Maskawa, T. Prog. Theor. Phys. 49, 652–657 (1973).

    Article  ADS  CAS  Google Scholar 

  3. Jarlskog, C. Phys. Rev. Lett. 55, 1039–1042 (1985).

    Article  ADS  CAS  Google Scholar 

  4. Lipkin, H. J. Phys. Lett. B 621, 126–132 (2005).

    Article  ADS  CAS  Google Scholar 

  5. Gronau, M. & Rosner, J. L. Phys. Lett. B 482, 71–76 (2000).

    Article  ADS  CAS  Google Scholar 

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Correspondence to Yosef Nir.

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Nir, Y. Let it B. Nature 499, 290–291 (2013).

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