Editing CERN Axion Solar Telescope (section)

=== Search for dark matter ===
CAST was able to constrain the axion-photon coupling constant from the very low up to the [[hot dark matter]] sector; and the current search range overlaps with the present cosmic hot dark matter bound which is axion mass, <math>m_a \lesssim 0.9 eV</math>.<ref name=":8">{{Cite web|title=CAST in Time – The Quest for Axions and Chameleons|url=https://ep-news.web.cern.ch/content/cast-time-quest-axions-and-chameleons|access-date=2021-06-23|website=EP News|language=en}}</ref><ref name=":2" /> The new detectors at CAST are also looking for proposed dark matter candidates such as the [[Chameleon particle|solar chameleons]] and pharaphotons as well as the relic axions from the [[Big Bang|Big bang]] and [[Inflation (cosmology)|Inflation]].<ref name=":8" /><ref>{{Cite web|title=CAST opens a new window into dark energy and dark matter after 11 years of operation and continuous renewal.|url=https://ep-news.web.cern.ch/content/cast-opens-new-window-dark-energy-and-dark-matter-after-11-years-operation-and-continuous|access-date=2021-06-23|website=EP News|language=en}}</ref> In late 2017, the CAST helioscope which originally was searching for solar axion and ALPs, was converted into haloscope to hunt for the Dark Matter wind in [[Milky Way|milky way]]'s [[galactic halo]] while it crosses the Earth. These idea of streaming dark wind is thought to affect and cause the random and anisotropic orientation of [[solar flare]]s, for which the CAST haloscope will serve as a testbed.<ref>{{Cite web|title=OSQAR experiment sheds light on a hidden sector of CERN's scientific heritage|url=https://ep-news.web.cern.ch/content/osqar-experiment-sheds-light-hidden-sector-cerns-scientific-heritage|access-date=2021-06-23|website=EP News|language=en}}</ref><ref>{{Cite web|title=Search for axions in streaming dark matter|url=https://ep-news.web.cern.ch/content/search-axions-streaming-dark-matter|access-date=2021-06-23|website=EP News|language=en}}</ref><ref>{{Cite web|date=2017-09-22|title=Study links solar activity to exotic dark matter|url=https://cerncourier.com/a/study-links-solar-activity-to-exotic-dark-matter/|access-date=2021-06-23|website=CERN Courier|language=en-GB}}</ref>