Someone seemed to be sending X-rays from the Central Milky Way.
Another potential intriguing signal has become questionable. Jester would write about the neutrino dark matter seen in the \(3.55\keV\) X-ray signals. The same Jester now wrote a blog post titled
positive one and a negative one.
Jester is faithful to his personality which is why he only discusses the negative one. It's a paper with the "bananas" in the title – this word has appeared in the physics titles before.
The positive paper was published today and it does argue that there is a \(3.55\keV\) line in the Milky Way center. The somewhat older negative paper claims that
- some upper bounds imply that the sterile neutrinos in the Milky Way center may be ruled out
- there is no signal, anyway.
Concerning the second negative and more powerful claim, they support the worries of some of us – that there are way too many boring spectral lines around \(3.5\keV\) and two of them emitted by potassium may fully account for the "signal", up to 1-sigma errors.
Aside from potassium, these authors have borrowed another powerful weapon in their effort to exterminate the germs of the dark matter excitement: chlorine. (I pray that the Kiev junta won't do the same thing in Donetsk.)
I was personally betting that this \(3.5\keV\) signal has always been due to some mundane spectral lines and other effects because these lines are dense and hide lots of potential for minor errors and misunderstandings. But it's true that I am in no way certain in one way or another and we are probably going to see many papers on both sides before the situation gets clear.