Constraints on holographic QCD phase transitions from PTA observations  

作　　者：Song He Li Li Sai Wang Shao-Jiang Wang 

机构地区：[1]Center for Theoretical Physics and College of Physics,Jilin University,Changchun 130012,China [2]School of Physical Science and Technology,Ningbo University,Ningbo 315211,China [3]CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China [4]School of Fundamental Physics and Mathematical Sciences,Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences(UCAS),Hangzhou 310024,China [5]Theoretical Physics Division,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [6]School of Physical Sciences,University of Chinese Academy of Sciences(UCAS),Beijing 100049,China [7]Max Planck Institute for Gravitational Physics(Albert Einstein Institute),Am Muhlenberg 1,Golm 14476,Germany

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第1期67-74,共8页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the National Key Research and Development Program of China(Grant Nos.2020YFC2201501,2021YFC2203004,and 2021YFA0718304);the National Natural Science Foundation of China(Grant Nos.12075101,12235016,12122513,12075298,12175243,12105344,11991052,12235019,and 12047503);the Fundamental Research Funds for the Central Universities;the Max Planck Partner Group Research Grant;the Science Research Grants from the China Manned Space Project(Grant No.CMS-CSST-2021-B01)。

摘　　要：The underlying physics of QCD phase transition in the early Universe remains largely unknown due to its strong-coupling nature during the quark-gluon plasma/hadron gas transition,yet a holographic model has been proposed to quantitatively fit the lattice QCD data while with its duration of the first-order phase transition(FoPT)left undetermined.At specific baryon chemical poten-tial,the first-order QCD phase transition agrees with the observational constraint of baryon asymmetry.It,therefore,provides a scenario for phase transition gravitational waves(GWs)within the standard model of particle physics.If these background GWs could contribute dominantly to the recently claimed common-spectrum red noise from pulsar timing array(PTA)observations,the duration of this FoPT can be well constrained,and the associated primordial black holes are still allowed by current observations.

关 键 词：pulsar timing array QCD phase transition gravitational waves primordial black holes 

分 类 号：P111[天文地球—天文学]