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Neutrino interaction modelling and uncertainties for T2K analyses

8 Sept 2021, 16:00
18m
THotel

THotel

Via dei Giudicati, 66, 09131 Cagliari, Italy

Speaker

Dr Clarence Wret (University of Rochester)

Description

In order to achieve the ambitious goal of characterising neutrino flavour oscillations with percent-level precision, it is critical for current and future long-baseline neutrino oscillation experiments to substantially reduce existing systematic uncertainties. The most impactful these uncertainties stem from the challenges of modelling few-GeV neutrino-nucleus interactions. In order to confront this challenge, the T2K experiment’s Neutrino Interaction Working Group (NIWG) aims to implement up to date theoretical models in T2K’s Monte-Carlo event generator (NEUT); to define a suitable parametrisation of the model’s uncertainties as an input for neutrino oscillation analyses; and to constrain these parameters using global lepton and hadron scattering data.

In this talk we present the latest uncertainty model from T2K’s NIWG as well as a comparison of the model to available data. Among other improvements, the latest model includes: a parametrisation offering substantial freedom to the input Spectral Function for charged-current quasi-elastic (CCQE) interactions; a momentum transfer dependent correction to the nuclear removal energy for CCQE interactions based on inclusive electron scattering data; and an updated treatment of nuclear medium effects in resonant pion production interactions.

Working group WG2

Primary author

Dr Clarence Wret (University of Rochester)

Co-author

Dr Stephen Dolan (CERN)

Presentation materials