A new fifth force between particles carrying B−L charges is well-motivated by the intriguing U(1)B−L extension of the standard model. The gauge boson mediator, Féeton, also serves as a dark matter candidate. In this letter, we propose a novel experimental design to detect the quantum phase difference caused by this fifth force using a superconducting Josephson junction. We find that the experiment has the best sensitivity to the gauge coupling when the gauge boson is within the mass range of 0.01eV to 10eV, which is an interesting mass region for the Féeton dark matter. This opens up a new avenue for the measurement of new physics at small scale below millimeter.

中文翻译：

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通过超导约瑟夫森结检测第五力规范玻色子


携带 B-L 电荷的粒子之间新的第五个力是由标准模型的有趣 U（1）B-L 扩展很好地激发的。规范玻色子介质 Féeton 也是暗物质候选者。在这封信中，我们提出了一种新的实验设计，使用超导约瑟夫森结来检测由第五力引起的量子相位差。我们发现，当规范玻色子在 0.01eV 至 10eV 的质量范围内时，该实验对规范耦合的敏感性最高，这是费顿暗物质的一个有趣质量区域。这为毫米以下小尺度新物理场的测量开辟了一条新途径。