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arXiv 2412.01428gr-qcastro-ph.CO
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多标量场暴胀中的倾斜与张量标量比:非和可分情形

Tilt and Tensor-to-Scalar Ratio in Multi-Scalar Field Inflation: Non-Sum-Separable Case

Fereshteh Felegary, Seyed Ali Hosseini Mansoori, Tahere Fallahi Serish, Phongpichit Channuie

AI总结:

本文探讨了非和可分情形下的正则多标量场暴胀,通过引入动能与势能项间的线性耦合项,有效降低了谱指数 $n_{s}$ 和张量标量比 $r$ 的预测值,使其符合近期 Planck+BICEP/Keck 的观测约束,从而验证了混沌型势的可行性。

摘要:

对于混沌型势 $V=\sum_{i} μ_{i} ϕ_{i}^{p}$,动能与势能项和可分的正则多标量场暴胀已被当前观测排除。本文探讨了非和可分情形,在正则拉格朗日量中引入动能与势能项间的线性耦合项,以在多标量场中验证混沌型势。该耦合影响慢滚参数,并改变了我们对谱指数 $n_{s}$ 和张量标量比 $r$ 的预测,它们直接依赖于这些参数。事实上,与标准正则多场暴胀相比,$n_{s}$ 和 $r$ 的值降低至符合近期 Planck+BICEP/Keck 约束的水平。

英文摘要:

The canonical multi-scalar field inflation where the kinetic and potential terms are sum-separable is ruled out by the current observations for the chaotic-type potential $V=\sum_{i} μ_{i} ϕ_{i}^{p}$. This paper explores the non-sum-separable case to validate the chaotic-type potential in the multi-scalar field, incorporating a linear coupling term between the kinetic and potential terms in the canonical Lagrangian. This coupling influences the slow-roll parameters and also alters our predictions for the spectral index $n_{s}$ and the tensor-to-scalar ratio $r$, which directly depend on those parameters. In fact, compared to standard canonical multi-field inflation, the values of $n_{s}$ and $r$ decrease to levels consistent with the recent Planck+BICEP/Keck constraint.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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