Tribrid inflation, type II leptogenesis, and observable gravitational waves in supersymmetric SU(3) c × SU(2) L × SU(2) R × U(1) B-L ...

IF 5.9 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Journal of Cosmology and Astroparticle Physics Pub Date : 2025-10-02 DOI:10.1088/1475-7516/2025/10/019

Waqas Ahmed, Saleh O. Allehabi, Farishta Israr and Mansoor Ur Rehman

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Abstract

We present a concrete realization of tribrid inflation within the framework of the gauge group SU(3)c × SU(2)L × SU(2)R × U(1)B-L. In this model, inflation is driven by the neutral components of SU(2)L triplet Higgs fields, which also play a central role in generating the observed baryon asymmetry of the universe via non-thermal leptogenesis. Tiny neutrino masses arise naturally through a type-II seesaw mechanism, facilitated by SU(2)R triplet Higgs fields. Supergravity corrections, stemming from the leading-order terms in a non-minimal Kähler potential, are essential in bringing the predictions of the scalar spectral index ns into agreement with the latest cosmological data, including the Atacama Cosmology Telescope Data Release 6, Planck 2018, and LB-BK18. A key feature of this model is the existence of a viable parameter space that predicts potentially observable primordial gravitational waves, with a tensor-to-scalar ratio r ≲ 0.001, placing it within reach of upcoming experiments.

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超对称星系SU(3) c × SU(2) L × SU(2) R × U(1) B-L中可观测到的引力波的混合暴胀、II型轻生…

给出了在规范群SU(3)c × SU(2)L × SU(2)R × U(1)B-L框架内的混合膨胀的一个具体实现。在这个模型中，暴胀是由SU(2)L三重态希格斯场的中性成分驱动的，这也在通过非热轻生产生观测到的宇宙重子不对称性中起着核心作用。微小的中微子质量通过ii型跷跷板机制自然产生，由SU(2)R三重态希格斯场促进。超重力修正源于非最小Kähler势的首阶项，对于使标量谱指数ns的预测与最新的宇宙学数据（包括阿塔卡马宇宙学望远镜数据发布6、普朗克2018和LB-BK18）保持一致至关重要。该模型的一个关键特征是存在一个可行的参数空间，它可以预测潜在可观测到的原始引力波，其张量与标量之比r > 0.001，使其在即将进行的实验中触手可及。

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来源期刊

Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理

CiteScore

10.20

自引率

23.40%

发文量

632

审稿时长

1 months

期刊介绍： Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.