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A search for solar axions and anomalous neutrino magnetic moment with the complete PandaX-II data

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arxiv 2008.06485 v4 pith:4U3J63EY submitted 2020-08-14 hep-ex

classification hep-ex
keywords datamagneticmomentaxionscompleteexcessneutrinopandax-ii
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We report a search for new physics signals using the low energy electron recoil events in the complete data set from PandaX-II, in light of the recent event excess reported by XENON1T. The data correspond to a total exposure of 100.7 ton-day with liquid xenon. With robust estimates of the dominant background spectra, we perform sensitive searches on solar axions and neutrinos with enhanced magnetic moment. We find that the axion-electron coupling $g_{Ae}<4.6\times 10^{-12}$ for an axion mass less than $\rm 0.1~keV/c^2$ and the neutrino magnetic moment $\mu_{\nu}<4.9\times 10^{-11}\mu_{B}$ at 90% confidence level. The observed excess from XENON1T is within our experimental constraints.

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  1. Neutrino magnetic moments: effective versus fundamental parameters

    hep-ph 2025-05 conditional novelty 4.0 of 10

    Effective neutrino magnetic moments are experiment-dependent; using solar neutrino data from dark matter detectors, the authors derive new bounds on the fundamental Majorana transition moments and translate them into ...

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