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High-energy physics

From generation to generation

A new measurement from the LHCb experiment at CERN's Large Hadron Collider impinges on a puzzle that has been troubling physicists for decades — namely the breaking of the symmetry between matter and antimatter.

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Figure 1: Experimental constraints on the unitarity triangle.


  1. Christenson, J. H., Cronin, J. W., Fitch, V. L. & Turlay, R. Phys. Rev. Lett. 13, 138–140 (1964).

    ADS  Article  Google Scholar 

  2. The LHCb collaboration Nature Phys. 11, 743–747 (2015).

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

    ADS  Article  Google Scholar 

  4. Perl, M. L. et al. Phys. Rev. Lett. 35, 1489–1492 (1975).

    ADS  Article  Google Scholar 

  5. Herb, S. W. et al. Phys. Rev. Lett. 39, 252–255 (1977).

    ADS  Article  Google Scholar 

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Correspondence to Robert Kowalewski.

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Kowalewski, R. From generation to generation. Nature Phys 11, 705–706 (2015).

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