来自GammeV实验的对变色龙和类轴子粒子的约束
Constraints on chameleons and axion-like particles from the GammeV experiment
摘要：
我们目前的GammeV实验的这两个方面的最新结果。第一个方面是使用可变基线，“光透过墙”技术搜索轴子状粒子。该检索排除了具有高置信度的PVLAS信号的颗粒解释。GammeV实验的第二个方面是寻找变色龙粒子，即可能导致宇宙暗能量的标量粒子。这是通过从“罐子里的粒子”实验中寻找一个特征性的余辉信号来实现的，在这个实验中，变色龙粒子被困在一个具有高磁场的区域中，并缓慢地衰减成可检测的光子。这是第一次使用这种实验技术来探测这些粒子。我们把有趣的限制范围有限的一般变色龙模型。这些限制是对其他实验的补充，例如扭摆实验，它探测新标量粒子产生的力。
英文摘要：
We present the most recent results of both aspects of the GammeV experiment. The first aspect is a search for axion-like particles using a variable baseline, "light-shining-through-a-wall" technique. This search excludes the particle interpretation of the PVLAS signal with high confidence. The second aspect of the GammeV experiment is a search for chameleon particles, scalar particles which may be responsible for the dark energy of the universe. This is accomplished by looking for a characteristic afterglow signature from a "particle-in-a-jar" experiment whereby chameleon particles become trapped in a region with a high magnetic field and slowly decay into detectable photons. This is the first use of this experimental technique to probe for these particles. We place interesting limits on a limited range of general chameleon models. These limits are complimentary to other experiments, such as torsion pendulum experiments, which probe for forces that would result from new scalar particles.
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