Neutrinos come to Town

Margarita Synanidi — Thu, 27 Nov 2014 09:56:14 +0000

Neutrinos come to Town
by Elena Wildner (CERN)

Poster for the second meeting on the European Strategy for Neutrino Oscillation Physics (click image to enlarge) Image credit: Neutrino Town Meeting

The second meeting on the European Strategy for Neutrino Oscillation Physics was held the 14-16 May 2012 at CERN, attracting some 150 registrants, from European institutes and beyond.

The goal of the meeting was to collect necessary input from the neutrino oscillation community and prepare a proposal to the Preparatory Group of the European Strategy Group. The consensus of the community should be expressed in this proposal, with a medium- and long-term road map for the accelerator based neutrino oscillation physics facilities in Europe.

The meeting concluded by stressing again the great discovery potential of the physics of massive neutrinos: it raises new questions that have no unique answer in the Standard Model of particle physics, and calls for a high priority programme in Europe. One of the highest prizes, leptonic CP violation, requires accelerator-born neutrino beams. Proposals for a middle and long-term accelerator-based programme were formulated and discussed critically, stressing the importance of a sustained R&D towards the ultimate accelerator and detector facilities, and the synergy with astro-particle physics.

The written proposal for the European Strategy Group will be worked on and presented at the Preparatory Strategy Meeting in Krakow (10-12 September 2012).In addition, Alain Blondel presented Beams for Neutrino Physics: a coherent proposal? in the EuCARD annual meeting. A full report of the Neutrino Town Meeting is available below.

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Neutrino Oscillation Physics

issue 2

Accelerator neutrinos are recovering their lead

Margarita Synanidi — Tue, 25 Nov 2014 08:22:21 +0000

Accelerator neutrinos are recovering their lead
by Mathilde Chaudron (CERN) with Vittorio Palladino (INFN)

Fig:Overview of the T2K experiment in Japan. Image credit: T2K collaboration.

On July 19th 2013, the international T2K collaboration proudly announced definitive observation of muon neutrino to electron neutrino transformation. “This T2K observation is the first of its kind”, stated the collaboration in a press release, underlying that the probability for random statistical fluctuations to produce this result was less than on in a trillion.

In order to get to this result, the T2K experiment used data collected from the world’s largest underground neutrino detector, Super-Kamiokande, located in Japan. A muon neutrino beam was produced in the Japan Proton Accelerator Research Complex (J-PARC) and sent 295 km away to Super-Kamiokande, where its composition was studied and compared with the initial one.

Observation of this new type of neutrino oscillation opens the way to new studies - only possible with accelerator neutrinos - of charge-parity (CP) violation, which provides a distinction in physical processes involving matter and antimatter. CP violation in neutrinos in the very early universe might explain one of the most profound mysteries in science: the domination of matter over antimatter in our universe.

The T2K experiment is operated by an international collaboration, gathering over 400 physicists from 59 institutions in 11 countries.

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Neutrino Oscillation Physics

issue 7

accelerating-news-arc.web.cern.ch - Neutrino Oscillation Physics

Neutrinos come to Town

Accelerator neutrinos are recovering their lead