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Neutrino-induced deuteron disintegration experiment

Abstract : Cross sections for the disintegration of the deuteron via neutral-current (NCD) and charged-current (CCD) interactions with reactor antineutrinos are measured to be 6.08 +/- 0.77 x 10^(-45) cm-sq and 9.83 +/- 2.04 x 10^(-45) cm-sq per neutrino, respectively, in excellent agreement with current calculations. Since the experimental NCD value depends upon the CCD value, if we use the theoretical value for the CCD reaction, we obtain the improved value of 5.98 +/- 0.54 x 10^(-45) for the NCD cross section. The neutral-current reaction allows a unique measurement of the isovector-axial vector coupling constant in the hadronic weak interaction (beta). In the standard model, this constant is predicted to be exactly 1, independent of the Weinberg angle. We measure a value of beta^2 = 1.01 +/- 0.16. Using the above improved value for the NCD cross section, beta^2 becomes 0.99 +/- 0.10.
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http://hal.in2p3.fr/in2p3-00007681
Contributor : Sylvie Flores Connect in order to contact the contributor
Submitted on : Thursday, December 2, 1999 - 12:48:18 PM
Last modification on : Friday, October 8, 2021 - 10:46:05 AM

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S P. Riley, Z D. Greenwood, W R. Kropp, L R. Price, F. Reines, et al.. Neutrino-induced deuteron disintegration experiment. Physical Review C, American Physical Society, 1999, 59, pp.1780-1787. ⟨in2p3-00007681⟩

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