用XENON1T和LUX寻找太阳弛豫/标量
Searching for a solar relaxion/scalar with XENON1T and LUX
摘要：
我们考虑液体氙暗物质探测器搜索一个轻标量粒子产生的太阳核心，特别是一个耦合到电子。通过与电子的相互作用，标量粒子可以在太阳中产生，主要是通过韧致辐射过程，随后它被液体氙原子吸收，留下瞬时闪烁光和电离事件。使用XENON 1 T和大型地下氙的最新实验结果，我们将电子和光标量之间的耦合的界限从仅S1分析为$g_{ϕee} < 7 \times 10^{-15}$，从仅S2分析为$g_{ϕee} < 2 \times 10^{-15}$。这些可以被解释为与希格斯粒子的混合角的界限，$\sin θ< 2 \times 10^{-9} \, \left(7 \times 10^{-10}\right)$，对于通过这种混合耦合到电子的弛豫的情况。这个界限比从恒星演化考虑中推断出的最强间接界限弱几倍。
英文摘要：
We consider liquid xenon dark matter detectors for searching a light scalar particle produced in the solar core, specifically one that couples to electrons. Through its interaction with the electrons, the scalar particle can be produced in the Sun, mainly through Bremsstrahlung process, and subsequently it is absorbed by liquid xenon atoms, leaving prompt scintillation light and ionization events. Using the latest experimental results of XENON1T and Large Underground Xenon, we place bounds on the coupling between electrons and a light scalar as $g_{ϕee} < 7 \times 10^{-15}$ from S1-only analysis, and as $g_{ϕee} < 2 \times 10^{-15}$ from S2-only analysis. These can be interpreted as bounds on the mixing angle with the Higgs, $\sin θ< 2 \times 10^{-9} \, \left(7 \times 10^{-10}\right)$, for the case of a relaxion that couples to the electrons via this mixing. The bounds are a factor few weaker than the strongest indirect bound inferred from stellar evolution considerations.
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