The T2K experiment measures muon neutrino disappearance and electron neutrino appearance in accelerator-produced neutrino and antineutrino beams. With an exposure of 14.7(7.6)×10^20 protons on target in the neutrino (antineutrino) mode, 89 ν_e candidates and seven anti-ν_e candidates are observed, while 67.5 and 9.0 are expected for δ_CP=0 and normal mass ordering. The obtained 2σ confidence interval for the CP-violating phase, δ_CP, does not include the CP-conserving cases (δ_CP=0, π). The best-fit values of other parameters are sin^2θ_23=0.526_-0.036^+0.032 and Δm_32^2=2.463_-0.070^+0.071×10^-3 eV^2/c^4.
Search for CP Violation in Neutrino and Antineutrino Oscillations by the T2K Experiment with 2.2×10^21 Protons on Target
Checchia, CMembro del Collaboration Group
;Collazuol, GMembro del Collaboration Group
;JOHNSON, STEPHANIE;Laveder, MMembro del Collaboration Group
;Longhin, AMembro del Collaboration Group
;
2018
Abstract
The T2K experiment measures muon neutrino disappearance and electron neutrino appearance in accelerator-produced neutrino and antineutrino beams. With an exposure of 14.7(7.6)×10^20 protons on target in the neutrino (antineutrino) mode, 89 ν_e candidates and seven anti-ν_e candidates are observed, while 67.5 and 9.0 are expected for δ_CP=0 and normal mass ordering. The obtained 2σ confidence interval for the CP-violating phase, δ_CP, does not include the CP-conserving cases (δ_CP=0, π). The best-fit values of other parameters are sin^2θ_23=0.526_-0.036^+0.032 and Δm_32^2=2.463_-0.070^+0.071×10^-3 eV^2/c^4.File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
PhysRevLett.121.171802.pdf
accesso aperto
Tipologia:
Published (publisher's version)
Licenza:
Creative commons
Dimensione
505.73 kB
Formato
Adobe PDF
|
505.73 kB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
