English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Axion Like Particles (ALPs) are one promising kind of dark matter candidateparticles that are predicted to couple with photons in the presence of magneticfields. The oscillations between photons and ALPs travelling in the magneticfields have been used to constrain ALP properties. In this work, we obtain somenew constraints on the ALP mass $m_{\rm a}$ and the photon-ALP couplingconstant $g$ with two different magnetic field models through TeV photons fromPKS 2155-304. One is the discrete-$\varphi$ model that the magnetic field hasthe orientation angle $\varphi$ changes discretely and randomly from onecoherent domain to the next, another is the linearly-continuous-$\varphi$ modelthat the magnetic field orientation angle $\varphi$ varies continuously acrossneighboring coherent domains. For the discrete-$\varphi$ model, we can obtainthe best constraints on the ALP mass $m_{1}=m_{\rm a}/(1\ {\rm neV})=0.1$ andon the photon-ALP coupling constant $g_{11}=g/(10^{-11}\ {\rm GeV^{-1}})=5$,the reasonable range of the ALP mass $m_{1}$ is 0.08 $\thicksim$ 0.2 when$g_{11}$=5, and the only reasonable value of the photon-ALP coupling constantis $g_{11}$=5 when $m_{1}$=0.1. For the linearly-continuous-$\varphi$ model, wecan obtain the best constraints on the ALP mass $m_{1}=0.1$ and on thephoton-ALP coupling constant $g_{11}=0.7$, the reasonable range of the ALP mass$m_{1}$ is 0.05 $\thicksim$ 0.4 when $g_{11}$=0.7, and the reasonable range ofthe photon-ALP coupling constant $g_{11}$ is 0.5 $\thicksim$ 1 when$m_{1}$=0.1. All the results are consistent with the upper bound($g<6.6\times10^{-11}\ {\rm GeV^{-1}}$, i.e. $g_{11}<6.6$) set by the CASTexperiment.

Constraints on axionlike particles with different magnetic field models from the PKS 2155-304 energy spectrum