# ICHEP 2022

Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

## A simulation study of tau events at the proposed ICAL in INO

Jul 8, 2022, 7:05 PM
1h 25m
Bologna, Italy

#### Bologna, Italy

Palazzo della Cultura e dei Congressi
Poster Neutrino Physics

### Speaker

Mr Thiru Senthil R (The Institute of Mathematical Sciences, Taramani, Chennai 600113, India and Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India.)

### Description

The proposed magnetised Iron Calorimeter (ICAL) detector in the India Based Neutrino Observatory (INO) aims to study neutrino oscillation parameters through interactions of atmospheric neutrinos at ICAL. We present here the first results of tau neutrino events analysis at ICAL. We have written a C-based Monte Carlo neutrino event generator for the proposed detector. It generates Charged Current (CC) and Neutral Current (NC) using Honda neutrino flux weighted by the cross section in Deep Inelastic Scattering (DIS) regime. Using our generator we have shown the significance of the of tau neutrino flux due to neutrino oscillations over the NC background in DIS regime in atmopsheric neutrinos. We also carried out our study using the events sample generated by the existing NUANCE neutrino event generator which includes the events from Elastic, Quasi Elastic and DIS regimes. From the analysis with NUANCE events we have established the detection capability for tau neutrino events is over 3 sigma confidence level for a period of 10 years. We have also studied the increase in reach of ICAL to the neutrino oscillation parameter $\sin^2\theta_{23}$ and $\Delta m_{32}^2$ on including the tau events and showed how this overcomes the limitation due to systematic uncertainties. Finally we have shown the significant improvement in oscillation parameters measurement from the combined study of mu neutrino events and tau neutrino events.

In-person participation Yes

### Primary authors

Mr Thiru Senthil R (The Institute of Mathematical Sciences, Taramani, Chennai 600113, India and Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India.) Prof. Indumathi D (The Institute of Mathematical Sciences, Taramani, Chennai 600113, India and Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India.)

### Co-author

Prof. Prashant Shukla (Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India and Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India.)