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arXiv 2202.07004hep-thgr-qchep-ph
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宇宙学常数和电弱尺度的环境选择

Environmental selection of the cosmological constant and electroweak scales

Matteo Moretti, Francisco Gil Pedro

摘要:

我们研究自私/金发女孩希格斯模型是否可以扩展到容纳真空与正确的希格斯质量和宇宙学常数。通过引入与希格斯标量玻色子耦合的多个四形场,我们发现宇宙学常数和电弱等级问题可以同时解决,而不需要手工插入相关的物理标度,也避免了微调。膜荷的边界是理论中唯一的无量纲自由参数,它取决于四种形式的标量耦合的强度,并且可以与通过Bousso-Polchinski机制单独求解宇宙学常数问题所需的边界具有相同的数量级。

英文摘要:

We investigate whether selfish/Goldilocks Higgs models can be extended to accomodate vacua with both the right Higgs mass and cosmological constant. Through the introduction of multiple four-form fields coupled with the Higgs scalar boson we find that both the cosmological constant and the electroweak hierarchy problems can be addressed simultaneously, without inserting the relevant physical scales by hand and avoiding fine tuning. The resulting bounds on the brane charges, the only dimensionful free parameter of the theory, depend on the strength of the four-form scalar coupling and can be of the same order of magnitude as those necessary for a solution to the cosmological constant problem alone via the Bousso-Polchinski mechanism.

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