3 years ago

Average CsI neutron density distribution from COHERENT data.

Y.Y. Zhang, M. Cadeddu, Y.F. Li, C. Giunti

Using the coherent elastic neutrino-nucleus scattering data of the COHERENT experiment, we determine for the first time the average neutron rms radius of $^{133}\text{Cs}$ and $^{127}\text{I}$. We obtain the practically model-independent value $R_{n} = 5.5 {}^{+0.9}_{-1.1} \, \text{fm}$ using the symmetrized Fermi and Helm form factors. We also point out that the COHERENT data show a $2.3\sigma$ evidence of the nuclear structure suppression of the full coherence.

Publisher URL: http://arxiv.org/abs/1710.02730

DOI: arXiv:1710.02730v3

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