How heavy is dark matter? Scientists radically narrow the potential mass range for the first time — ScienceDaily

Maria J. Danford

Researchers have calculated the mass array for Dark Make any difference — and it can be tighter than the science globe considered.

Their findings — because of to be printed in Physics Letters B in March — radically slim the array of opportunity masses for Dark Make any difference particles, and support to concentrate the research for foreseeable future Dark Make any difference-hunters. The University of Sussex scientists utilized the founded reality that gravity acts on Dark Make any difference just as it acts on the visible universe to perform out the reduced and higher boundaries of Dark Matter’s mass.

The results clearly show that Dark Make any difference are not able to be both ‘ultra-light’ or ‘super-heavy’, as some have theorised, except if an as-but undiscovered pressure also acts upon it.

The crew utilized the assumption that the only pressure acting on Dark Make any difference is gravity, and calculated that Dark Make any difference particles should have a mass concerning ten-3 eV and 107 eV. That is a substantially tighter array than the ten-24 eV — 1019 GeV spectrum which is normally theorised.

What would make the discovery even far more significant is that if it turns out that the mass of Dark Make any difference is exterior of the array predicted by the Sussex crew, then it will also verify that an added pressure — as nicely as gravity — acts on Dark Make any difference.

Professor Xavier Calmet from the Faculty of Mathematical and Actual physical Sciences at the University of Sussex, stated:

“This is the 1st time that any person has considered to use what we know about quantum gravity as a way to compute the mass array for Dark Make any difference. We had been astonished when we realised no-just one experienced finished it before — as had been the fellow researchers reviewing our paper.

“What we have finished displays that Dark Make any difference are not able to be both ‘ultra-light’ or ‘super-heavy’ as some theorise — except if there is an as-but not known added pressure acting on it. This piece of investigation can help physicists in two strategies: it focuses the research region for Dark Make any difference, and it will most likely also support expose irrespective of whether or not there is a mysterious not known added pressure in the universe.”

Folkert Kuipers, a PhD pupil performing with Professor Calmet, at the University of Sussex, stated:

“As a PhD pupil, it can be wonderful to be able to perform on investigation as exciting and impactful as this. Our findings are quite good news for experimentalists as it will support them to get nearer to exploring the legitimate character of Dark Make any difference.”

The visible universe — such as ourselves, the planets and stars — accounts for twenty five for each cent of all mass in the universe. The remaining 75 for each cent is comprised of Dark Make any difference.

It is recognized that gravity acts on Dark Make any difference for the reason that that is what accounts for the condition of galaxies.

Story Resource:

Elements delivered by University of Sussex. First published by Anna Ford. Be aware: Articles may possibly be edited for fashion and duration.

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