Hyper-K

Lead Research Organisation: University of Warwick
Department Name: Physics

Abstract

The recent discovery of the Higgs boson at the LHC was a major technical and scientific triumph, but it is not the end of the story. There are still many unanswered questions in particle physics. Of these, perhaps the most intriguing is the question of why there is more matter in the Universe than antimatter. If this wasn't the case essentially all the particles would have annihilated with their antiparticle partners and the Universe would be a very different place; there would be no large-scale structure and we wouldn't be here to answer this question.
There must be some explanation for this matter-antimatter asymmetry, and what ever the answer, it implies that "CP is violated", i.e. matter behaves slightly differently from antimatter. CP violation has been observed in the decays of strongly interacting particles, but this is not sufficient to explain the matter-dominated Universe. However, there are indications that neutrinos might provide the answer through a process called lepto-genesis. CP violation in the neutrino sector could represent the next major discovery in particle physics.

Neutrinos are neutral "ghost" particles that hardly interact with matter. When the travel over large distances they change their nature, a process called neutrino flavour oscillations, whereby one type of neutrino oscillates into a different type. CP violation for neutrinos would imply that these oscillation rates are slightly different for neutrinos and antineutrinos. Observing this difference is the next big challenge to experimental particle physics.

The LBNE experiment is the flagship of the future US particle physics programme. It is designed to discover CP violation for neutrinos. A powerful beam of neutrinos will be fired 1300 km from Fermilab, near Chicago, towards a huge underground detector in South Dakota. This underground detector will contain 50,000 tons of liquid argon at a temperature of 87 K (-186 degree Celsius). The liquid argon technology enables neutrinos to be detected with "photograph-quality" detail, marking a breakthrough in neutrino experiments.

In this proposal, UK physicists are requesting £2.5M over three years to take leading roles in the LBNE experiment and to develop the liquid argon detector technology. This research and development phase will allow the UK to be the leading non-US partner in this incredibly exciting experiment.

Planned Impact

See submission from lead institute QMUL

Publications

10 25 50
 
Description Warwick Particle Physics Masterclass 
Form Of Engagement Activity Participation in an open day or visit at my research institution
Part Of Official Scheme? Yes
Geographic Reach Regional
Primary Audience Schools
Results and Impact 50-60 Warwickshire school children attended and their teachers.

The feedback we receive from Masterclass days are always very positive i.e. we are clearly inspiring students with a scientific mind to pursue particle physics further.
Year(s) Of Engagement Activity 2006,2007,2008,2009,2010
 
Description Warwick Particle Physics Masterclass 
Form Of Engagement Activity Participation in an open day or visit at my research institution
Part Of Official Scheme? Yes
Geographic Reach Regional
Primary Audience Schools
Results and Impact 50-60 Warwickshire sixth form students and their teachers attended

Very positive feedback both directly and from questionaire forms
Year(s) Of Engagement Activity 2006,2007,2008,2009,2010