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Synergies and prospects for early resolution of the neutrino mass ordering.pdf (2.21 MB)

Synergies and prospects for early resolution of the neutrino mass ordering

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posted on 2023-06-10, 04:16 authored by Anatael Cabrera, Yang Han, Michel Obolensky, Fabien Cavalier, João Coelho, Diana Navas-Nicolás, Hiroshi Nunokawa, Laurent Simard, Jianming Bian, Nitish Nayak, Lily AsquithLily Asquith, Thiago J C Bezerra, Jeff HartnellJeff Hartnell, Pierre Lasorak, others
The measurement of neutrino mass ordering (MO) is a fundamental element for the understanding of leptonic flavour sector of the Standard Model of Particle Physics. Its determination relies on the precise measurement of ?m312 and ?m322 using either neutrino vacuum oscillations, such as the ones studied by medium baseline reactor experiments, or matter effect modified oscillations such as those manifesting in long-baseline neutrino beams (LB?B) or atmospheric neutrino experiments. Despite existing MO indication today, a fully resolved MO measurement (= 5 s) is most likely to await for the next generation of neutrino experiments: JUNO, whose stand-alone sensitivity is ~ 3 s, or LB?B experiments (DUNE and Hyper-Kamiokande). Upcoming atmospheric neutrino experiments are also expected to provide precious information. In this work, we study the possible context for the earliest full MO resolution. A firm resolution is possible even before 2028, exploiting mainly vacuum oscillation, upon the combination of JUNO and the current generation of LB?B experiments (NOvA and T2K). This opportunity is possible thanks to a powerful synergy boosting the overall sensitivity where the sub-percent precision of ?m322 by LB?B experiments is found to be the leading order term for the MO earliest discovery. We also found that the comparison between matter and vacuum driven oscillation results enables unique discovery potential for physics beyond the Standard Model.

History

Publication status

  • Published

File Version

  • Published version

Journal

Scientific Reports

ISSN

2045-2322

Publisher

Springer Nature

Volume

12

Page range

5393

Event location

England

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2022-07-14

First Open Access (FOA) Date

2022-07-14

First Compliant Deposit (FCD) Date

2022-07-13

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