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John C. Hardy

Faculty: Distinguished Professor Emeritus


Professor Hardy's primary focus is on the study of superallowed nuclear beta decay as a probe of the weak interaction.By combining precise measurements with specialized calculations to account for radiative and isospin-symmetry-breaking effects, he and his colleagues have obtained the most precise value for the up-down quark mixing element of the Cabibbo-Kobayashi-Maskawa matrix and made possible the most demanding test currently available of the unitarity of that matrix; their results also set the tightest limit on the possible existence of scalar currents.They continue to refine and improve their studies in order to explore further for physics beyond the Standard Model.

Latest Publications

V. Horvat and J.C. Hardy. “Sum-fit method of analysis of nuclear decay spectra affected by extending dead-time.” Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 868, 53--58, Oct 2017.

Gregory Christian, Charles M. Folden, John Hardy, Yiu-Wing Lui, Donald May, Dan Melconian, Joseph Natowitz, Ralf Rapp, Grigory Rogachev, Robert Tribble, and Sherry Yennello. “The Cyclotron Institute at Texas A&M University.” Nuclear Physics News, 27(2), 5--13, Apr 2017.

N. Nica, J.C. Hardy, V.E. Iacob, T.A. Werke, C.M. Folden III, L. Pineda, and M.B. Trzhaskovskaya. “Test of internal-conversion theory with a measurement in 111Cd.” EPJ Web of Conferences, 146, 10004, 2017.

T. Eronen, J. C. Hardy, L. Canete, A. Jokinen, J. Hakala, A. Kankainen, V. S. Kolhinen, J. Koponen, I. D. Moore, I. M. Murray, H. Penttilä, I. Pohjalainen, O. Poleshchuk, J. Reinikainen, S. Rinta-Antila, N. Soukouti, A. Voss, and J. Äystö. “QEC value of the superallowed β emitter 42Sc.” Phys. Rev. C, 95(2), 025501, Feb 2017.

N. Nica, J. C. Hardy, V. E. Iacob, T. A. Werke, C. M. Folden, K. Ofodile, and M. B. Trzhaskovskaya. “Precise measurement of αK and αT for the 109.3-keV M4 transition in 125Te : Test of internal-conversion theory.” Phys. Rev. C, 95(6), 064301, Jun 2017.

Awards & Recognition

  • Tom W. Bonner Prize from the American Physical Society (2006)
  • Fellowship, American Physical Society (1983)
  • Rutherford Medal in Physics from the Royal Society of Canada (1981)
  • Fellowship, Royal Society of Canada (1979)
  • Herzberg Medal from the Canadian Association of Physicists (1976)