University of Washington, Seattle, Washington 98195, USA.
Phys Rev Lett. 2010 Jul 30;105(5):051801. doi: 10.1103/PhysRevLett.105.051801. Epub 2010 Jul 26.
Scalar fields with a "chameleon" property, in which the effective particle mass is a function of its local environment, are common to many theories beyond the standard model and could be responsible for dark energy. If these fields couple weakly to the photon, they could be detectable through the afterglow effect of photon-chameleon-photon transitions. The ADMX experiment was used in the first chameleon search with a microwave cavity to set a new limit on scalar chameleon-photon coupling βγ excluding values between 2×10(9) and 5×10(14) for effective chameleon masses between 1.9510 and 1.9525 μeV.
具有“变色龙”性质的标量场在超出标准模型的许多理论中很常见，并且可能是暗能量的原因。如果这些场与光子弱耦合，它们可能会通过光子-变色龙-光子跃迁的余晖效应被探测到。ADMX 实验首次使用微波腔进行变色龙搜索，为有效变色龙质量在 1.9510 至 1.9525μeV 之间的标量变色龙-光子耦合βγ设定了新的限制，排除了 2×10(9)到 5×10(14)之间的值。
