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T2K measurements of muon neutrino and antineutrino disappearance using $3.13\times 10^{21}$ protons on target

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In: Physical Review D, Vol. 103, No. 1, L011101, 01.01.2021.

Research output: Contribution to journalLetterpeer-review

Bibtex

@article{72e07a68e27846b9873c6b27c590c845,
title = "T2K measurements of muon neutrino and antineutrino disappearance using $3.13\times 10^{21}$ protons on target",
abstract = " We report measurements by the T2K experiment of the parameters $\theta_23$ and $\Delta m^2_{32}$ which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNSneutrino oscillation model at T2K's neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. Data taken from $1.49\times 10^{21}$ protons on target (POT) in neutrino mode and $1.64\times 10^21$ POT in antineutrino mode are used. Assuming the normal neutrino mass ordering the best-fit values obtained by T2K were $\sin^2\theta_{23}=0.51^{+0.06}_{-0.07}$ $(0.43^{+0.21}_{-0.05})$ and $\Delta m^2_{32}=2.47^{+0.08}_{-0.09} (2.50^{+0.18}_{-0.13})$ $eV^2/c^4$. for neutrinos (antineutrinos). No significant differences between the values of the parameters describing the disappearance of muon neutrinos and antineutrinos were observed. An analysis using an effective two-flavour neutrino oscillation model where the sine of the mixing angle is allowed to take non-physical values larger than 1 is also performed to check the consistency of our data with the three-flavor model. Our data were found to be consistent with a physical value for the mixing angle. ",
keywords = "hep-ex",
author = "{T2K Collaboration} and T. Dealtry and Doyle, {T. A.} and Finch, {A. J.} and Kormos, {L. L.} and J. Nowak and O'Keeffe, {H. M.} and Ratoff, {P. N.} and Walsh, {J. G.}",
year = "2021",
month = jan,
day = "1",
doi = "10.1103/PhysRevD.103.L011101",
language = "English",
volume = "103",
journal = "Physical Review D",
issn = "1550-7998",
publisher = "American Physical Society",
number = "1",

}

RIS

TY - JOUR

T1 - T2K measurements of muon neutrino and antineutrino disappearance using $3.13\times 10^{21}$ protons on target

AU - T2K Collaboration

AU - Dealtry, T.

AU - Doyle, T. A.

AU - Finch, A. J.

AU - Kormos, L. L.

AU - Nowak, J.

AU - O'Keeffe, H. M.

AU - Ratoff, P. N.

AU - Walsh, J. G.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - We report measurements by the T2K experiment of the parameters $\theta_23$ and $\Delta m^2_{32}$ which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNSneutrino oscillation model at T2K's neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. Data taken from $1.49\times 10^{21}$ protons on target (POT) in neutrino mode and $1.64\times 10^21$ POT in antineutrino mode are used. Assuming the normal neutrino mass ordering the best-fit values obtained by T2K were $\sin^2\theta_{23}=0.51^{+0.06}_{-0.07}$ $(0.43^{+0.21}_{-0.05})$ and $\Delta m^2_{32}=2.47^{+0.08}_{-0.09} (2.50^{+0.18}_{-0.13})$ $eV^2/c^4$. for neutrinos (antineutrinos). No significant differences between the values of the parameters describing the disappearance of muon neutrinos and antineutrinos were observed. An analysis using an effective two-flavour neutrino oscillation model where the sine of the mixing angle is allowed to take non-physical values larger than 1 is also performed to check the consistency of our data with the three-flavor model. Our data were found to be consistent with a physical value for the mixing angle.

AB - We report measurements by the T2K experiment of the parameters $\theta_23$ and $\Delta m^2_{32}$ which govern the disappearance of muon neutrinos and antineutrinos in the three-flavor PMNSneutrino oscillation model at T2K's neutrino energy and propagation distance. Utilizing the ability of the experiment to run with either a mainly neutrino or a mainly antineutrino beam, muon-like events from each beam mode are used to measure these parameters separately for neutrino and antineutrino oscillations. Data taken from $1.49\times 10^{21}$ protons on target (POT) in neutrino mode and $1.64\times 10^21$ POT in antineutrino mode are used. Assuming the normal neutrino mass ordering the best-fit values obtained by T2K were $\sin^2\theta_{23}=0.51^{+0.06}_{-0.07}$ $(0.43^{+0.21}_{-0.05})$ and $\Delta m^2_{32}=2.47^{+0.08}_{-0.09} (2.50^{+0.18}_{-0.13})$ $eV^2/c^4$. for neutrinos (antineutrinos). No significant differences between the values of the parameters describing the disappearance of muon neutrinos and antineutrinos were observed. An analysis using an effective two-flavour neutrino oscillation model where the sine of the mixing angle is allowed to take non-physical values larger than 1 is also performed to check the consistency of our data with the three-flavor model. Our data were found to be consistent with a physical value for the mixing angle.

KW - hep-ex

U2 - 10.1103/PhysRevD.103.L011101

DO - 10.1103/PhysRevD.103.L011101

M3 - Letter

VL - 103

JO - Physical Review D

JF - Physical Review D

SN - 1550-7998

IS - 1

M1 - L011101

ER -