Searching for axion-like particles with the blazar observations of MAGIC and Fermi-LAT  

作　　者：Hai-Jun Li Xiao-Jun Bi Peng-Fei Yin 李海军;毕效军;殷鹏飞(Center for Advanced Quantum Studies,Department of Physics,Beijing Normal University,Beijing 100875,China;Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;School of Physics,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Center for Advanced Quantum Studies,Department of Physics,Beijing Normal University,Beijing 100875,China [2]Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [3]School of Physics,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics C》2022年第8期262-272,共11页中国物理C（英文版）

基　　金：Supported by the National Key R&D Program of China (2016YFA0400200);the National Natural Science Foundation of China (U1738209,11851303)。

摘　　要：In this study,we explore the axion-like particle(ALP)-photon oscillation effect in the γ-ray spectra of the blazars Markarian 421(Mrk 421) and PG 1553+113,which are measured by the Major Atmospheric Gamma Imaging Cherenkov Telescopes(MAGIC) and Fermi Large Area Telescope(Fermi-LAT) with high precision.The Mrk421 and PG 1553+113 observations of 15 and five phases are used in the analysis,respectively.We find that the combined analysis with all the 15 phases improves the limits of the Mrk 421 observations.For the selected blazar jet magnetic field and extragalactic background light models,the combined limit set by the Mrk 421 observations excludes the ALP parameter region with the ALP-photon coupling of g_(aγ)≥2×10^(-11) GeV^(-1) for the ALP mass of~8×10^(-9)≤m_(a)≤2×10^(-7) eV at 95% confidence level.The main uncertainties of the analysis originate from the blazar jet magnetic field model.We also find that the ALP hypothesis can slightly improve the fit to the PG1553+113 results in several parameter regions.We do not set the limit in this case.

关 键 词：AXION Γ-RAY BLAZAR 

分 类 号：O572.2[理学—粒子物理与原子核物理]