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Proton Decay Searches with DUNE and the Photon Detection System -- APS Talk

Document #:
DUNE-doc-2121-v1
Document type:
DUNE document
Submitted by:
Kevin Wood
Updated by:
Kevin Wood
Document Created:
26 Jan 2017, 10:51
Contents Revised:
26 Jan 2017, 10:51
Metadata Revised:
27 Sep 2017, 05:14
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Abstract:
The Deep Underground Neutrino Experiment (DUNE) will be comprised of a beam line and near detector complex at Fermilab, Illinois as well as a massive far detector located 1300 km away at Sanford Underground Research Facility (SURF), South Dakota. To achieve its rich physics program, DUNE plans to construct a 40kt fiducial volume Liquid Argon Time Projection Chamber (LArTPC) far detector almost a mile underground. The size, location, and technology of the proposed far detector make it an attractive tool to search for proton decay, which has yet to be observed. Observation of such a rare event requires high sensitivity to the signal and high background rejection rate. A particular background of interest arises from cosmic muons interacting with rock surrounding the detector and producing a variety of particles which can enter the detector and leave signatures similar to that of proton decay. In order to mitigate this background without sacrificing signal acceptance efficiency, precise tracking, made possible by the LArTPC technology, is required. Precise 3D localization of proton decay events relies on the detector’s ability to identify the prompt emission of scintillation light from proton decay events as the t0-defining signal. This work examines the background rate and detection efficiency of this light in a detailed Monte Carlo simulation using DUNE`s far detector reference design and demonstrates a high signal efficiency while keeping the expected number of cosmogenic background events sufficiently low.
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