Speaker
Mr
Francis Bench
(The University of Liverpool)
Description
I report the results of a search for $\bar{\nu}_{\mu} \rightarrow \bar{\nu}_{e}$ oscillations at the T2K experiment in a 3-flavour framework using an exposure of $1.49 \times 10^{21}$ Protons On Target (POT) in $\nu$ mode and $1.12 \times 10^{21}$ POT in $\bar{\nu}$ mode, an increase of $50\%$ in the $\bar{\nu}$ exposure compared to results reported in 2016.
Results are reported for a joint analysis where candidate events are selected from the e-like events observed in $\bar{\nu}$ running mode, while four other far detector event samples are used with near-detector data to constrain the values of the oscillation and systematic parameters, including the mass-hierarchy, giving the best possible constraint on $\bar{\nu}_{e}$ appearance. Two hypotheses are tested, a) no $\bar{\nu}_{e}$ appearance and b) $\bar{\nu}_{e}$ appearance according to the current best knowledge of the PMNS matrix, where both rate-only and rate+shape analyses are performed, producing p-values for each hypothesis.
| Authorship annotation | For the T2K collaboration, on behalf of the VALOR group |
|---|---|
| Session and Location | Wednesday Session, Poster Wall #68 (Auditorium Gallery Right) |
| Poster included in proceedings: | yes |
Primary author
Mr
Francis Bench
(The University of Liverpool)
Co-authors
Mr
Andrew Chappell
(University of Warwick)
Mr
Chistopher Barry
(The University of Liverpool)
Dr
Costas Andreopoulos
(The University of Liverpool)
Dr
Davide Sgalaberna
(CERN)
Dr
Raj Shah
(University of Oxford)
Dr
Stephen Dennis
(The University of Liverpool)
