标题： 新物理对弯曲时空背景中电弱真空稳定性的影响 显示英文标题

标题： Impact of New Physics on the EW vacuum stability in a curved spacetime background

摘要： 最近的研究表明，与直观的解耦论证相反，非常大的能量尺度（例如普朗克尺度）处的新物理现象可能对电弱真空中寿命产生强烈影响。 特别是，真空可能会完全不稳定。 这项研究是在平直时空背景下进行的，由于这些是普朗克物理效应，因此有必要将分析扩展到弯曲时空。 通常预期在这些极端条件下，引力应完全抑制真实真空泡的形成，从而消除新物理的不稳定效应。 在本工作中，我们将分析扩展到弯曲时空，并表明尽管引力趋向于稳定，但新物理的不稳定效应仍然（远）占主导地位。 为了获得模型无关的结果，高能新物理以两种不同的独立方式参数化：作为希格斯场的高阶算符，或引入具有非常大质量的新粒子。 在这两种情况下都观察到了不稳定效应，这表明了一个不依赖于新物理参数化细节的普遍机制，从而保持了在平直时空分析中得到的结果。 显示英文摘要

摘要： It has been recently shown that, contrary to an intuitive decoupling argument, the presence of new physics at very large energy scales (say around the Planck scale) can have a strong impact on the electroweak vacuum lifetime. In particular, the vacuum could be totally destabilized. This study was performed in a flat spacetime background, and it is important to extend the analysis to curved spacetime since these are Planckian-physics effects. It is generally expected that under these extreme conditions gravity should totally quench the formation of true vacuum bubbles, thus washing out the destabilizing effect of new physics. In this work we extend the analysis to curved spacetime and show that, although gravity pushes toward stabilization, the destabilizing effect of new physics is still (by far) the dominating one. In order to get model independent results, high energy new physics is parametrized in two different independent ways: as higher order operators in the Higgs field, or introducing new particles with very large masses. The destabilizing effect is observed in both cases, hinting at a general mechanism that does not depend on the parametrization details for new physics, thus maintaining the results obtained from the analysis performed in flat spacetime.