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A hybrid setup for fundamental unknowns in neutrino oscillations using T2HK (ν) and μ-DAR (ν¯)
KTH, School of Engineering Sciences (SCI), Physics, Theoretical Particle Physics. Institute for Basic Science (IBS), South Korea.ORCID iD: 0000-0002-6401-1257
2017 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 2017, no 5, 115Article in journal (Refereed) Published
Abstract [en]

Neutrino mass hierarchy, CP-violation, and octant of θ23 are the fundamental unknowns in neutrino oscillations. In order to address all these three unknowns, we study the physics reach of a setup, where we replace the antineutrino run of T2HK with antineutrinos from muon decay at rest (μ-DAR). This approach has the advantages of having higher statistics in both neutrino and antineutrino modes, and lower beam-on backgrounds for antineutrino run with reduced systematics. We find that a hybrid setup consisting of T2HK (ν) and μ-DAR (ν¯) in conjunction with full exposure from T2K and NOνA can resolve the issue of mass hierarchy at greater than 3σ C.L. irrespective of the choices of hierarchy, δCP, and θ23. This hybrid setup can also establish the CP-violation at 5σ C.L. for ∼ 55% choices of δCP, whereas the same for conventional T2HK (ν+ν¯) setup along with T2K and NOνA is around 30%. As far as the octant of θ23 is concerned, this hybrid setup can exclude the wrong octant at 5σ C.L. if θ23 is at least 3° away from maximal mixing for any δCP.

Place, publisher, year, edition, pages
Springer, 2017. Vol. 2017, no 5, 115
Keyword [en]
CP violation, Neutrino Physics
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-209748DOI: 10.1007/JHEP05(2017)115ISI: 000402842300001Scopus ID: 2-s2.0-85019702634OAI: oai:DiVA.org:kth-209748DiVA: diva2:1114074
Note

QC 20170622

Available from: 2017-06-22 Created: 2017-06-22 Last updated: 2017-07-03Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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More styles
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  • de-DE
  • en-GB
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