Tag archives: neutrinos
By Matin Durrani
The cover feature of the September 2014 issue of Physics World, which is out now in print and digital formats, concerns “sterile neutrinos” – a hypothesized fourth kind of neutrino in addition to the familiar electron, muon and tau neutrinos. Sterile neutrinos are controversial – they have never been detected and we are not even sure if they exist at all. But if they do, sterile neutrinos could potentially solve a raft of unsolved problems in physics, including why neutrinos themselves have mass, what makes up dark matter and why there is so much more matter than antimater in the universe.
In the article, you can find out more about the mysteries these hypothetical particles could solve. But since they might not exist, why – you may wonder – would anyone bother looking for them? In other words, is the search for sterile neutrinos pointless or profound? Check out the September issue to find out more.
By Hamish Johnston
When I was a PhD student, there was a group of retired professors that shared a tiny office in the physics department. It was whispered that one of them was extremely wealthy thanks to a successful commercial spin-out and we marvelled at the fact that he came in to work every day rather than enjoying the fruits of his labours. However, it wasn’t the wealthy professor who was destined for international fame. In 1994 his officemate Bertram Brockhouse shared the Nobel Prize for Physics, and Brockhouse’s quiet life changed dramatically. Indeed, he got his own office!
I was reminded of this little group when I read ZapperZ’s blog entry about his encounter with Ray Davis before Davis bagged the 2002 Nobel for his work on neutrinos. Sitting next to Davis on a two-hour flight, ZapperZ had an inkling that he was beside an interesting character after their brief chat about physics. But it wasn’t until the Nobel was announced several years later that he realized the opportunity he had missed.
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.
By James Dacey
“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.