A Dark Matter mystery explained?

A paper on the arXiv this morning offers an explanation for an intriguing, long-standing anomalous result from the DAMA experiment.

Illustration by Chris Wormell from "A Map of the Invisible" (detail)

Illustration by Chris Wormell from “A Map of the Invisible” (detail)

According to our current best model of how the universe hangs together, the Earth orbits the Sun within a galactic halo of Dark Matter particles. The Dark Matter particles are imperceptible – transparent really, rather than dark – but their gravitational influence is needed to explain the motion and distribution of galaxies¹.

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Mile End Road

I spent most of the past two days in the “Arts 2” building of Queen Mary University of London, on Mile End Road.

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According to Wikipedia, Mile End was one of the earliest suburbs of London, recorded in 1288 as La Mile Ende, meaning ‘The hamlet a mile away’ (from Aldgate). This is middle English, apparently, which looks quite a lot like French to me. Though if it were it would presumably be La 1.6 Kilometre Ende.

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Theory, experiment and supersymmetry

I am dismayed by the plethora of null results coming out of my experiment, as well as from our friendly rivals, at the Large Hadron Collider.

Detail of image by Chris Wormell from

Detail of image by Chris Wormell from “A Map of the Invisible”

Don’t get me wrong, null results are important and it is a strength of particle physics that we acknowledge this. Reporting only positive results is the most effective way to introduce bias and undermine science.

Although many theorists are dismayed because we have not so far turned up evidence for their ideas about extending the Standard Model – new particles, new forces and so on – that is not the source of my dismay either. I would be happy to see some of that, but nature will do its thing whatever my wishes might be. I get a kick from finding out what nature’s thing is, even if it is more Standard Model in places we have never measured before. If the Standard Model turns out to be isolated, that is important new information.

What does dismay me is the number of “search” papers we produce where the conclusion is “no evidence for XYZ-beyond-the-Standard-Model-thing, boo”, without quantifying the implied agreement with the Standard Model.

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2018 Highlights? Seriously?

I’d say 2018 has been “mixed”, at best.

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Read more at the Cosmic Shambles Network

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Note added… maybe I was a bit too negative. At the air quality seems to actually be better now than recently, as can be seen in this post, to which Michael de Podesta drew my attention on twitter.

 

 

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