Wormholes and masses for Goldstone bosons
Wormholes and masses for Goldstone bosons
复制标题
戈德斯通玻色子的虫洞和质量
DOI：
10.1007/jhep02(2019)136
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发表时间：
2017
影响因子：
5.4
通讯作者：
A. Urbano
中科院分区：
文献类型：
--
作者：
R. Alonso;A. Urbano
摘要对于与爱因斯坦引力最小耦合的轴子粒子，存在欧几里得作用的非平凡驻点，称为虫洞。它们以非微扰的方式明确打破轴子的连续全局平移对称性，并根据轴子衰变常数的值产生可能与 QCD 竞争的有效势。在本文中，我们从理论和现象学两个方面探讨了这个问题。在理论方面，我们解决了虫洞解的稳定性问题，并且证明了二次作用谱仅具有正特征值。在现象学方面，除了 QCD 轴子的明显应用之外，我们还讨论了超轻暗物质和黑洞超辐射模型的相关后果。我们最后讨论了通用陪集的虫洞解决方案及其产生的潜力。
A bstractThere exist non-trivial stationary points of the Euclidean action for an axion particle minimally coupled to Einstein gravity, dubbed wormholes. They explicitly break the continuos global shift symmetry of the axion in a non-perturbative way, and generate an effective potential that may compete with QCD depending on the value of the axion decay constant. In this paper, we explore both theoretical and phenomenological aspects of this issue. On the theory side, we address the problem of stability of the wormhole solutions, and we show that the spectrum of the quadratic action features only positive eigenvalues. On the phenomenological side, we discuss, beside the obvious application to the QCD axion, relevant consequences for models with ultralight dark matter and black hole superradiance. We conclude discussing wormhole solutions for a generic coset and the potential they generate.