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pro vyhledávání: '"Li, Hai‐jun"'
Autor:
Li, Hai-Jun
In this work, we extend the QCD axion mass mixing in the early Universe and investigate the temperature effects in the mixing. We explore the scenario where two $Z_{\mathcal N}$ QCD axions undergo mass mixing during the QCD phase transition, yielding
Externí odkaz:
http://arxiv.org/abs/2410.00377
Autor:
Li, Hai-Jun, Zhou, Yu-Feng
We introduce a novel level crossing in the mass mixing between two QCD axions, one canonical QCD axion and one $Z_{\mathcal N}$ QCD axion. The level crossing can take place at the QCD phase transition critical temperature or slightly before it, depen
Externí odkaz:
http://arxiv.org/abs/2408.00267
Markarian 421 is a well-known nearby BL Lac blazar at the redshift $z=0.031$. Many previous works were investigated to constrain the axion-photon coupling from its TeV gamma-ray observations, showing the upper limit on the coupling constant $g_{a\gam
Externí odkaz:
http://arxiv.org/abs/2406.00387
We present the limits on photon to axionlike particle (ALP) coupling from the 10-year period observations of the TeV BL Lacertae blazar 1ES 1215+303 (with redshift $z=0.130$). The contemporaneous gamma-ray spectra are measured by the collaborations F
Externí odkaz:
http://arxiv.org/abs/2312.05555
The even light QCD axion called the $Z_{\mathcal N}$ axion can both solve the strong CP problem and account for the dark matter (DM). We point out that the single and double level crossings can naturally take place in the mass mixing between the $Z_{
Externí odkaz:
http://arxiv.org/abs/2310.02126
Autor:
Li, Hai-Jun
It was shown that the required high quality of the Peccei-Quinn (PQ) symmetry can be a natural outcome of the multiple QCD axions model. In the axiverse, a hypothetical mass mixing between the QCD axions and axion-like particles (ALPs) can occur, whi
Externí odkaz:
http://arxiv.org/abs/2307.09245
The supermassive black holes (SMBHs) are ubiquitous in the center of galaxies, although the origin of their massive seeds is still unknown. In this paper, we investigate the SMBHs formation from the QCD axion bubbles. In this case, the primordial bla
Externí odkaz:
http://arxiv.org/abs/2304.00939
Autor:
Li, Hai-Jun
The QCD axion bubbles can be formed due to an extra Peccei-Quinn (PQ) symmetry breaking in the early Universe. In this paper, we investigate the QCD axion bubbles formation from the PQ symmetry broken by hidden $SU(N)_H$ gauge interactions after infl
Externí odkaz:
http://arxiv.org/abs/2303.04537
Autor:
Li, Hai-Jun, Chao, Wei
We investigate the photon-axionlike particle (ALP) oscillation effects on TeV gamma-ray spectral irregularities from the uncertain redshift active galactic nuclei (AGN) VER J0521+211. The gamma-ray spectra are measured by Fermi-LAT and VERITAS with t
Externí odkaz:
http://arxiv.org/abs/2211.00524
Autor:
Yan, Li-Ming1 (AUTHOR), Li, Hai-Jun2 (AUTHOR), Fan, Qi2 (AUTHOR), Xue, Yi-Dong2 (AUTHOR), Wang, Tao2 (AUTHOR) wangtao@yau.edu.cn
Publikováno v:
PLoS ONE. 8/1/2024, Vol. 19 Issue 8, p1-11. 11p.