Searches for New Physics focus either on the direct production of new particles at colliders or at deviations from known observables at low energies. In order to discover New Physics in precision measurements, both experimental and theoretical uncertainties must be under full control. Laser spectroscopy nowadays offers a tool to measure transition frequencies very precisely. For certain molecular and atomic transitions the experimental technique permits a clean study of possible deviations. Theoretical progress in recent years allows us to compare ab initio calculations with experimental data. We study the impact of a variety of New Physics scenarios on these observables and derive novel constraints on many popular generic Standard Model extensions. As a result, we find that molecular spectroscopy is not competitive with atomic spectroscopy and neutron scattering to probe new electron-nucleus and nucleus-nucleus interactions, respectively. Molecular and atomic spectroscopy give similar bounds on new electron-electron couplings, for which, however, stronger bounds can be derived from the magnetic moment of the electron. In most of the parameter space H\(_2\) molecules give stronger constraints than T\(_2\) or other isotopologues.A preprint version of the article is available at ArXiv.

中文翻译：

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用tri和类似分子进行新物理学搜索的研究

寻找新物理学的重点是在对撞机上直接产生新粒子，或者以低能偏离已知可观测物。为了在精确测量中发现新物理，必须完全控制实验和理论上的不确定性。如今，激光光谱学提供了一种非常精确地测量跃迁频率的工具。对于某些分子和原子跃迁，实验技术允许对可能的偏差进行干净的研究。近年来的理论进展使我们可以比较从头算用实验数据进行计算。我们研究了各种新物理场景对这些可观测值的影响，并得出了对许多流行的通用标准模型扩展的新颖约束。结果，我们发现分子光谱法与原子光谱法和中子散射法分别探测新的电子-核和核-核相互作用不具有竞争性。分子和原子光谱学在新的电子-电子耦合中给出了相似的范围，但是对于它们，可以从电子的磁矩中得出更强的范围。在大多数参数空间中，H \（_ 2 \）分子比T \（_ 2 \）或其他同位素同质物具有更强的约束力。该文章的预印本可从ArXiv获得。