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arXiv · 2010.06810

Studies of Quantum-Mechanical Coherency Effects in Neutrino-Nucleus Elastic Scattering

V. Sharma·L. Singh·H. T. Wong·M. Agartioglu·J. -W. Chen·M. Deniz·S. Kerman·H. B Li·C. -P. Liu·K. Saraswat·M. K. Singh·V. Singh
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Abstract

Neutrino-nucleus elastic scattering ($\nu {\rm A}_{el}$) provides a unique laboratory to study the quantum-mechanical (QM) coherency effects in electroweak interactions. The deviations of the cross-sections from those of completely coherent systems can be quantitatively characterized through a coherency parameter $\alpha ( q^2 )$. The relations between $\alpha$ and the underlying nuclear physics in terms of nuclear form factors are derived. The dependence of cross-section on $\alpha ( q^2 )$ for the various neutrino sources is presented. The $\alpha ( q^2 )$-values are evaluated from the measured data of the COHERENT CsI and Ar experiments. Complete coherency and decoherency conditions are excluded by the CsI data with $p {=} 0.004$ at $q^2 {=} 3.1 {\times} 10^{3} ~ {\rm MeV^2}$ and with $p {=} 0.016$ at $q^2 {=} 2.3 {\times} 10^{3} ~ {\rm MeV^2}$, respectively, verifying that both QM superpositions and nuclear many-body effects contribute to $\nu {\rm A}_{el}$ interactions.

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V. Sharma, L. Singh, H. T. Wong, M. Agartioglu, J. -W. Chen, M. Deniz, S. Kerman, H. B Li, C. -P. Liu, K. Saraswat, M. K. Singh, V. Singh. 2020-10-14. Studies of Quantum-Mechanical Coherency Effects in Neutrino-Nucleus Elastic Scattering. https://doi.org/10.1103/physrevd.103.092002

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