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Title: First Measurement of Neutrino Oscillation Parameters using Neutrinos and Antineutrinos by NOvA

Abstract

The NOvA experiment has made a $$4.4\sigma$$-significant observation of $$\bar\nu_{e}$$ appearance in a 2 GeV $$\bar\nu_{\mu}$$ beam at a distance of 810 km. Using $$12.33\times10^{20}$$ protons on target delivered to the Fermilab NuMI neutrino beamline, the experiment recorded 27 $$\bar\nu_{\mu} \rightarrow \bar\nu_{e}$$ candidates with a background of 10.3 and 102 $$\bar\nu_{\mu} \rightarrow \bar\nu_{\mu}$$ candidates. This new antineutrino data is combined with neutrino data to measure the oscillation parameters $$|\Delta m^2_{32}| = 2.48^{+0.11}_{-0.06}\times10^{-3}$$ eV$^2/c^4$, $$\sin^2 \theta_{23} = 0.56^{+0.04}_{-0.03}$$ in the normal neutrino mass hierarchy and upper octant and excludes most values near $$\delta_{\rm CP}=\pi/2$$ for the inverted mass hierarchy by more than 3$$\sigma$$. The data favor the normal neutrino mass hierarchy by 1.9$$\sigma$$ and $$\theta_{23}$$ values in the upper octant by 1.6$$\sigma$$.

Authors:
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
NOvA
OSTI Identifier:
1546014
Report Number(s):
arXiv:1906.04907; FERMILAB-PUB-19-272-ND
1739571
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
TBD
Additional Journal Information:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Acero, M. A., and et al. First Measurement of Neutrino Oscillation Parameters using Neutrinos and Antineutrinos by NOvA. United States: N. p., 2019. Web.
Acero, M. A., & et al. First Measurement of Neutrino Oscillation Parameters using Neutrinos and Antineutrinos by NOvA. United States.
Acero, M. A., and et al. Tue . "First Measurement of Neutrino Oscillation Parameters using Neutrinos and Antineutrinos by NOvA". United States. https://www.osti.gov/servlets/purl/1546014.
@article{osti_1546014,
title = {First Measurement of Neutrino Oscillation Parameters using Neutrinos and Antineutrinos by NOvA},
author = {Acero, M. A. and et al.},
abstractNote = {The NOvA experiment has made a $4.4\sigma$-significant observation of $\bar\nu_{e}$ appearance in a 2 GeV $\bar\nu_{\mu}$ beam at a distance of 810 km. Using $12.33\times10^{20}$ protons on target delivered to the Fermilab NuMI neutrino beamline, the experiment recorded 27 $\bar\nu_{\mu} \rightarrow \bar\nu_{e}$ candidates with a background of 10.3 and 102 $\bar\nu_{\mu} \rightarrow \bar\nu_{\mu}$ candidates. This new antineutrino data is combined with neutrino data to measure the oscillation parameters $|\Delta m^2_{32}| = 2.48^{+0.11}_{-0.06}\times10^{-3}$ eV$^2/c^4$, $\sin^2 \theta_{23} = 0.56^{+0.04}_{-0.03}$ in the normal neutrino mass hierarchy and upper octant and excludes most values near $\delta_{\rm CP}=\pi/2$ for the inverted mass hierarchy by more than 3$\sigma$. The data favor the normal neutrino mass hierarchy by 1.9$\sigma$ and $\theta_{23}$ values in the upper octant by 1.6$\sigma$.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}