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Tag archives: neutrinos

Are ‘sterile neutrinos’ dark-matter particles after all?

Graph showing recent constrains on sterile neutrino production

Could sterile neutrinos constitute dark matter? (Courtesy: Bubul et al./ arXiv:1402.2301)

 

By Tushna Commissariat

It is always interesting to us at Physics World when a particular topic suddenly attracts the attentions of the physics community, especially when it’s a rather hotly debated subject. The past couple of days, for example, have seen a lot of talk about “sterile neutrinos”, based on two papers – published in quick succession on the arXiv preprint server – that suggest the tentative detection of these hypothetical paricles.

Both papers are based on an unidentified emission line seen in the X-ray spectrum of some galaxy clusters obtained by the European Space Agency’s XMM-Newton observatory. Intriguingly, sterile neutrinos are also considered to be possible dark-matter candidates, meaning that – if discovered – they would be the first fundamental particles to lie beyond the bounds of the Standard Model of particle physics.

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Particle art lights up Victorian ice well

By James Dacey

Photograph of art installation Covariance

Covariance includes 28,000 glass beads and 36,000 diamantés. (Courtesy: Richard Davies)

“The finished work is everything I had hoped for and more – it takes my breath away!”

That was the reaction of artist Lyndall Phelps upon seeing her physics-inspired installation in London, which will open to the public this Saturday. Entitled Covariance, the work was inspired by the SuperKamiokande neutrino observatory in Japan – reflecting the machinery of particle detectors and the way in which particle physicists visualize their data. The kaleidoscopic artwork is housed in a Victorian ice well beneath the London Canal Museum, in reference to the subterranean location of many large particle-physics experiments.

Phelps is an artist who often creates works inspired by science, where she looks in particular for the personal and emotive themes that can exist within academia. For this latest project, she worked in collaboration with Ben Still, a particle physicist from Queen Mary, University of London. The pair was commissioned to work on the project by the Institute of Physics (IOP) as the first in a programme of artists-in-residence called Superposition.

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