The energy budget of cosmological first-order phase transitions beyond the bag equation of state

doi:10.1088/1475-7516/2022/10/047

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	The energy budget of cosmological first-order phase transitions beyond the bag equation of state
	Wang, Shao-Jiang ; Yuwen, Zi-Yan
刊名	JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
	2022
期号	10 页码:47
关键词	GRAVITATIONAL-RADIATION MAGNETIC-FIELDS
ISSN号	1475-7516
DOI	10.1088/1475-7516/2022/10/047
英文摘要	The stochastic gravitational-wave backgrounds (SGWBs) from the cosmological first-order phase transitions (FOPTs) serve as a promising probe for the new physics beyond the standard model of particle physics. When most of the bubble walls collide with each other long after they had reached the terminal wall velocity, the dominated contribution to the SGWBs comes from the sound waves characterized by the efficiency factor of inserting the released vacuum energy into the bulk fluid motions. However, the previous works of estimating this efficiency factor have only considered the simplified case of the constant sound velocities in both symmetric and broken phases, either for the bag model with equal sound velocities or v-model with different sound velocities in the symmetric and broken phases, which is unrealistic from a viewpoint of particle physics. In this paper, we propose to solve the fluid EoM with an iteration method when taking into account the sound-velocity variation across the bubble wall for a general and realistic equation of state (EoS) beyond the simple bag model and v-model. We have found a suppression effect for the efficiency factor of bulk fluid motions, though such a suppression effect could be negligible for the strong FOPT, in which case the previous estimation from a bag EoS on the efficiency factor of bulk fluid motions still works as a good approximation.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27879]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Zhongguancun East Rd 55, Beijing 100190, Peoples R China 2.[Wang, Shao-Jiang 3.Univ Chinese Acad Sci UCAS, Sch Phys Sci, Yuquan Rd 19A, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Shao-Jiang,Yuwen, Zi-Yan. The energy budget of cosmological first-order phase transitions beyond the bag equation of state[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2022(10):47.
APA	Wang, Shao-Jiang,&Yuwen, Zi-Yan.(2022).The energy budget of cosmological first-order phase transitions beyond the bag equation of state.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(10),47.
MLA	Wang, Shao-Jiang,et al."The energy budget of cosmological first-order phase transitions beyond the bag equation of state".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .10(2022):47.