Speaker
Prof.
Sankagiri Umasankar
(Indian Institute of Technology Bombay)
Description
A combined analysis of disappearance and appearance data of NOvA
experiment gives three nearly degenerate solutions. This degeneracy
can be understood by the following argument: We first consider $\nu_e$
appearance signal due to vacuum oscillations in the limit of
maximal $\theta_{23}$ and no CP-violation. We then calculate the
deviations induced in the signal event rate by (a) matter effects
(NH or IH), (b) $\theta_{23}$ octance effects (HO or LO) and
CP-violation $(\delta_{C} = - \pi/2 \ {\rm or} \ \pi/2)$. We find
that the deviation caused by each of these effects is the same for
NOvA. The three fold degeneracy arises because the data of NOvA
is equal to the increase caused by two of the effects and the decrease caused
by the third effect. We also find that further data by NOvA can not
distinguish between these degenerate solutions but addition of one
year of neutrino run of DUNE can make a distinction at $3 \sigma$
confidence level between all three solutions.
| Session and Location | Wednesday Session, Poster Wall #85 (Auditorium Gallery Left) |
|---|---|
| Poster included in proceedings: | yes |
Primary author
Prof.
Sankagiri Umasankar
(Indian Institute of Technology Bombay)
Co-authors
Mr
Suman Bharti
(Indian Institute of Technology Bombay)
Dr
Suprabh Prakash
(Instituto de Fisica "Gleb Wataghin" - Unicamp)
Mr
Ushak Rahaman
(Indian Institute of Technology Bombay)
