LBNE and the Fermilab Liquid Argon Detector Programme

Lead Research Organisation: University of Sussex
Department Name: Sch of Mathematical & Physical Sciences

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

Refer to Cambridge JeS form.
 
Description This grant was for R&D on the LBND (now DUNE) detectors. Software was developed that will be used in the experiment to do physics in the future when the detector is built. Concepts for triggering the future detector on bursts of neutrinos from galactic supernova were developed.
Exploitation Route The findings from this grant are being taken forward by the international DUNE collaboration.
Sectors Other

 
Description The Department of Physics & Astronomy at the University of Sussex runs an intense outreach programme, closely linked to the research carried out within the Department. Our WWW is http://www.sussex.ac.uk/physics/outreach. Our activities not only involve research talks, but also hands on activities that introduce the basics of our research to the public. We work with members of the general public, and school and college students. We work with over 12,000 people per year, two-thirds of who are children of school age. We interact through stands at various science fairs and in classroom-type setting (including our travelling planetarium).
First Year Of Impact 2015
Sector Other
Impact Types Societal

 
Description DUNE UK Production Project
Amount £875,022 (GBP)
Funding ID ST/S003568/1 
Organisation Science and Technologies Facilities Council (STFC) 
Sector Public
Country United Kingdom
Start 09/2019 
End 09/2023
 
Description DUNE: Pre-Construction Phase
Amount £72,369 (GBP)
Funding ID ST/R000085/1 
Organisation Science and Technologies Facilities Council (STFC) 
Sector Public
Country United Kingdom
Start 10/2017 
End 09/2019
 
Description DUNE collaboration 
Organisation Fermilab - Fermi National Accelerator Laboratory
Department DUNE
Country United States 
Sector Public 
PI Contribution R&D towards the DUNE experiment.
Collaborator Contribution R&D towards the DUNE experiment.
Impact Progress towards realising the DUNE experiment. The US DOE has approved construction of the Far detector facility.
Start Year 2015