First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA

Acero, M A and Adamson, P and Giri, Anjan Kumar and et al, . (2019) First measurement of neutrino oscillation parameters using neutrinos and antineutrinos by NOvA. Physical Review Letters, 123 (15). ISSN 0031-9007

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Abstract

The NOvA experiment has seen a 4.4σ signal of ν̄e appearance in a 2 GeV ν̄μ beam at a distance of 810 km. Using 12.33×1020 protons on target delivered to the Fermilab NuMI neutrino beamline, the experiment recorded 27 ν̄μ→ν̄e candidates with a background of 10.3 and 102 ν̄μ→ν̄μ candidates. This new antineutrino data are combined with neutrino data to measure the parameters |Δm322|=2.48-0.06+0.11×10-3 eV2/c4 and sin2θ23 in the ranges from (0.53-0.60) and (0.45-0.48) in the normal neutrino mass hierarchy. The data exclude most values near δCP=π/2 for the inverted mass hierarchy by more than 3σ and favor the normal neutrino mass hierarchy by 1.9σ and θ23 values in the upper octant by 1.6σ.

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IITH Creators:
IITH CreatorsORCiD
Giri, Anjan KumarUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Indexed in Scopus and WoS
Subjects: Physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 28 Oct 2019 05:23
Last Modified: 04 Feb 2020 08:22
URI: http://raiith.iith.ac.in/id/eprint/6858
Publisher URL: http://doi.org/10.1103/PhysRevLett.123.151803
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