New challenges in reactor neutrinos: mapping between TAO and JUNO and dealing with nuclear uncertainties
by
DrFrancesco Capozzi
(MPI Munich)
→
Asia/Shanghai
Description
The JUNO project aims at probing the mass ordering and at improving significantly the precision on oscillation parameters. The unoscillated spectrum from one reactor core is planned to be closely monitored by the TAO detector, expected to have better resolution (×1/2) and higher statistics (×30) than JUNO. In the context of neutrino energy spectra endowed with fine-structure features from summation calculations, we analyze in detail the effects of energy resolution and nucleon recoil on observable event spectra. We show that a model spectrum in TAO can be mapped into a corresponding spectrum in JUNO through appropriate convolutions. The mapping is exact in the hypothetical case without oscillations, and holds to a very good accuracy in the real case with oscillations. We then analyze the sensitivity to mass ordering of JUNO (and its precision oscillometry capabilities) assuming a single reference spectrum, as well as bundles of variant spectra, as obtained by changing nuclear input uncertainties in summation calculations from a publicly available toolkit. We show through a χ^2 analysis that variant spectra induce little reduction of the sensitivity in JUNO, especially when TAO constraints are included. Subtle aspects of the statistical analysis of variant spectra are also discussed.
About the speaker:
I did my PhD at the University of Bari under the supervision of Eligio Lisi and Antonio Marrone. During this time I worked on the phenomenology of neutrino oscillations with a particular focus on the mass ordering. As a postdoc I have been one year at the University of Padova, one year at the Ohio State University, and now I am about to finish my three-years contract at the Max Planck Institute for Physics in Munich. I will soon move to Virginia Tech in the US. Starting from the end of my PhD and during my postdocs I got interested in neutrino flavour conversions astrophysical very dense environments. This is an extremely important topic, whose full understanding is mandatory for a correct interpretation of the next supernova neutrino burst. This is one of my main research topics nowadays. I also worked on neutrinos as a probe of physics beyond standard model and very recently I extended my field of expertise towards astronomy. In particular, I have been studying and revising the bounds on new physics (axions, neutrinos magnetic moment, …) coming from stellar evolution.
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Zoom meeting link ID: 618 2065 4622
or link: https://weidijia.zoom.com.cn/j/61820654622