标题： 利用中国脉冲星测时阵列数据释放版 1 限制宇宙相变 显示英文标题

标题： Constraining Cosmological Phase Transitions with Chinese Pulsar Timing Array Data Release 1

摘要： 中国脉冲星测时阵列（CPTA）合作组最近报告了随机引力波背景的观测证据。鉴于最新的CPTA观测结果，我们旨在探索CPTA探测新物理的能力。具体而言，我们利用CPTA数据限制了一阶宇宙相变，并发现所得限制结果比NANOGrav 12.5年数据稍紧，但弱于NANOGrav 15年数据。考虑到引力波源可能的复杂性，我们对宇宙相变和天体物理超大质量双黑洞混合情景进行了限制。我们的分析表明，CPTA在未来有潜力探测基本物理。 显示英文摘要

摘要： The Chinese Pulsar Timing Array (CPTA) collaboration has recently reported the observational evidence of a stochastic gravitational wave background. In light of the latest CPTA observation, we aim at exploring the ability of CPTA in probing new physics. Specifically, we constrain the first-order cosmological phase transitions with CPTA data, and find that the constraining result is slightly tighter than that of NANOGrav's 12.5-yr data but weaker than NANOGrav's 15-yr data. Considering the possible complexity of gravitational wave sources, we give the constraint on a mixed scenario of cosmological phase transitions and astrophysical supermassive binary black holes. Our analysis suggests that CPTA has a great potential to probe fundamental physics in the near future.