Domain Wall Network: A Dual Solution for Gravitational Waves and Hubble Tension?
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2022
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| _version_ | 1866913491136282624 |
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| author | Bian, Ligong Ge, Shuailiang Li, Changhong Shu, Jing Zong, Junchao |
| author_facet | Bian, Ligong Ge, Shuailiang Li, Changhong Shu, Jing Zong, Junchao |
| contents | We explore the possibility that domain wall networks generate the stochastic gravitational wave background (SGWB) observed as a strong common power-law process in the Data Release-2 of Parkes Pulsar Timing Array. We find that a broad range of parameters, specifically wall tension around $σ_{\textrm{DW}} \sim (29-414 , \textrm{TeV})^3$ and wall-decay temperature within $T_d \sim 20-257 , \textrm{MeV}$, can explain this phenomenon at a $68\%$ credible level. Meanwhile, the same parameters could ease the Hubble tension if particles from these domain wall networks decay into dark radiation. We establish a direct analytical relationship, $Ω_{\textrm{GW}}(f_p,T_0) h^2 \sim Ω_{\textrm{rad}} h^2 ( Ω_νΔN_{\textrm{eff}})^2$, to illustrate this coincidence, underlining its importance in the underlying physics and potential applicability to a wider range of models and data. Conversely, if the common power-law process is not attributed to domain wall networks, our findings impose tight limits on the wall tension and decay temperature. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2212_07871 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Domain Wall Network: A Dual Solution for Gravitational Waves and Hubble Tension? Bian, Ligong Ge, Shuailiang Li, Changhong Shu, Jing Zong, Junchao High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory We explore the possibility that domain wall networks generate the stochastic gravitational wave background (SGWB) observed as a strong common power-law process in the Data Release-2 of Parkes Pulsar Timing Array. We find that a broad range of parameters, specifically wall tension around $σ_{\textrm{DW}} \sim (29-414 , \textrm{TeV})^3$ and wall-decay temperature within $T_d \sim 20-257 , \textrm{MeV}$, can explain this phenomenon at a $68\%$ credible level. Meanwhile, the same parameters could ease the Hubble tension if particles from these domain wall networks decay into dark radiation. We establish a direct analytical relationship, $Ω_{\textrm{GW}}(f_p,T_0) h^2 \sim Ω_{\textrm{rad}} h^2 ( Ω_νΔN_{\textrm{eff}})^2$, to illustrate this coincidence, underlining its importance in the underlying physics and potential applicability to a wider range of models and data. Conversely, if the common power-law process is not attributed to domain wall networks, our findings impose tight limits on the wall tension and decay temperature. |
| title | Domain Wall Network: A Dual Solution for Gravitational Waves and Hubble Tension? |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2212.07871 |