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Revisiting the universal texture zero of flavour: a Markov chain Monte Carlo analysis

Bernigaud, Jordan 1,2; de Medeiros Varzielas, Ivo; Levy, Miguel; Talbert, Jim
1 Institut für Theoretische Teilchenphysik (TTP), Karlsruher Institut für Technologie (KIT)
2 Institut für Astroteilchenphysik (IAP), Karlsruher Institut für Technologie (KIT)

Abstract:

We revisit the phenomenological predictions of the Universal Texture Zero (UTZ) model of flavour originally presented in [1], and update them in light of both improved experimental constraints and numerical analysis techniques. In particular, we have developed an in-house Markov Chain Monte Carlo (MCMC) algorithm to exhaustively explore the UTZ’s viable parameter space, considering both leading- and next-to-leading contributions in the model’s effective operator product expansion. We also extract – for the first time – reliable UTZ predictions for the (poorly constrained) leptonic CP-violating phases, and ratio observables that characterize neutrino masses probed by (e.g.) oscillation, β-decay, and cosmological processes. We therefore dramatically improve on the proof-in-principle phenomenological analysis originally presented in [1], and ultimately show that the UTZ remains a minimal, viable, and appealing theory of flavour. Our results also further demonstrate the potential of robustly examining multi-parameter flavour models with MCMC routines.


Verlagsausgabe §
DOI: 10.5445/IR/1000160124
Veröffentlicht am 04.07.2023
Originalveröffentlichung
DOI: 10.1140/epjc/s10052-023-11654-0
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Dimensions
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Institut für Theoretische Teilchenphysik (TTP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1434-6052
KITopen-ID: 1000160124
Erschienen in The European Physical Journal C
Verlag Springer-Verlag
Band 83
Heft 6
Seiten Art.-Nr.: 479
Vorab online veröffentlicht am 08.06.2023
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Web of Science
Scopus
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