arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2408.12450hep-phastro-ph.COgr-qchep-th
收藏

引力中微子再加热下的热与非热暗物质

Thermal and nonthermal dark matters with gravitational neutrino reheating

Md Riajul Haque, Debaprasad Maity, Rajesh Mondal

AI总结:

本文研究引力产生的中微子再加热宇宙,结合I型跷跷板模型,分析热与非热暗物质产生,并给出再加热状态方程约束及暗物质与跷跷板参数的关联。

摘要:

我们详细讨论了仅通过引力相互作用从暴胀子产生的中微子如何成功实现宇宙的再加热。为此,我们引入了著名的I型跷跷板中微子模型。根据跷跷板模型参数,实现了两种不同的再加热历史,并分别称为:i) 中微子主导:在暴胀子主导之后,宇宙变为中微子主导,随后它们的衰变结束了再加热过程;ii) 中微子加热:尽管相对于暴胀子能量而言处于次主导地位,中微子仍能有效地加热热浴并产生辐射主导的宇宙。在施加重子不对称产额、考虑原初引力波(PGW)的大爆炸核合成(BBN)时的$\Delta N_{\rm eff}$约束后,我们得出再加热状态方程的参数范围在$0.5\lesssim w_\phi\lesssim1.0$内。在这些中微子驱动的再加热背景下,我们进一步对暗物质(DM)的热产生和非热产生进行了详细分析,引入了两个最小模型,即希格斯门户暗物质和经典QCD赝标量轴子。在面对各种直接和间接观测时,看似不相关的暗物质和I型跷跷板参数之间出现了有趣的关联。当暗物质在再加热期间被设置为冻结进入、冻结退出或振荡时,新的参数空间被打开,这些参数空间可能在未来的实验中被探测到,为在实验室中研究早期宇宙提供了一条间接途径。

英文摘要:

We have discussed in detail how neutrinos produced from inflaton solely through gravitational interaction can successfully reheat the universe. For this, we have introduced the well-known Type-I seesaw neutrino model. Depending on seesaw model parameters, two distinct reheating histories have been realized and dubbed as i) Neutrino dominating: Following the inflaton domination, the universe becomes neutrino dominated, and their subsequent decay concludes the reheating process, and ii) Neutrino heating: Despite being sub-dominant compared to inflaton energy, neutrinos efficiently heat the thermal bath and produce the radiation dominated universe. Imposing baryon asymmetric yield, the $ΔN_{\rm eff}$ constraint at Big Bang Nucleosynthesis (BBN) considering primordial gravitational waves (PGW), we have arrived at the following constraints on reheating equation of state to lie within $0.5\lesssim w_ϕ\lesssim1.0$. In these neutrino-driven reheating backgrounds, we further performed a detailed analysis of both thermal and non-thermal production of dark matter (DM), invoking two minimal models, namely the Higgs portal DM and classical QCD pseudo scalar axion. An interesting correlation between seemingly uncorrelated DM and Type-I seesaw parameters has emerged when confronting various direct and indirect observations. When DMs are set to freeze-in, freeze-out, or oscillate during reheating, new parameter spaces open, which could be potentially detectable in future experiments, paving an indirect way to look into the early universe in the laboratory.

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。

↑