Experimental bound on the charge radius of the electron neutrino
1991; American Physical Society; Volume: 43; Issue: 1 Linguagem: Inglês
10.1103/physrevd.43.r1
ISSN1538-4500
AutoresR. C. Allen, H. H. Chen, P. J. Doe, R. Hausammann, W. P. Lee, X. -Q. Lu, H. J. Mahler, M. Potter, K. C. Wang, T. J. Bowles, R. L. Burman, R. Carlini, D. R. F. Cochran, J. S. Frank, E. Piasetzky, V. D. Sandberg, D. Krakauer, R. L. Talaga,
Tópico(s)Neuroendocrine Tumor Research Advances
ResumoA limit on the electron-neutrino charge radius $|r|$ is derived from a measurement of the weak-neutral-current vector coupling constant ${g}_{V}$ obtained in electron-neutrino electron elastic scattering. The 90%-confidence interval for ${g}_{V}$ is $\ensuremath{-}0.177<{g}_{V}<0.187$, which for ${{sin}^{2}\ensuremath{\theta}}_{W}=0.227$ implies that the ${\ensuremath{\nu}}_{e}$ mean-square charge radius is in the range $\ensuremath{-}2.74\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}32}<〈{r}^{2}〉<4.88\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}32}$ ${\mathrm{cm}}^{2}$, or simply $|r|<2.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}16}$ cm. This is the first experimental bound on the ${\ensuremath{\nu}}_{e}$ charge radius, and is the same order of magnitude as bounds for ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ structure.
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