RV: Highlights from e-EPS: Neutrino Oscillation / DPG President / Outreach Database

Fuente: CERN Document Server: News Articles
Expuesto el: martes, 05 de junio de 2012 12:07
Autor: CERN Document Server: News Articles
Asunto: Highlights from e-EPS: Neutrino Oscillation

Asian experiments unlock neutrino oscillation mystery Two reactor experiments, China's Daya Bay and Korea's RENO, have made the best measurement of the neutrino mixing angle, θ13, an essential property for neutrino research. The discovery of a non-zero θ13 at approximately 9˚ – which was published in March and April this year – completes our picture of neutrino mixing. This quite large value for the mixing angle will make it easier to conduct future long baseline neutrino experiments. This, in turn, may lead to a better understanding of the matter-antimatter asymmetry seen in the Universe. Neutrino oscillations – the change in flavour seen as neutrinos move – were discovered in Japan in 1998. The three mixing angles – θ12, θ23, and θ13 – describe the relationship between certain flavour and mass states of neutrinos. They can be seen as the Euler angles between flavour (ve, vμ, vτ) and mass (v1, v2, v3) states, considered as two sets of orthogonal axes. θ12and θ23 were known – and large – but before now, we had only hints at the smallest value, θ13. Alessandro Bettini

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