Pieces of the flavour puzzle

Feruglio, Ferruccio

doi:10.1140/epjc/s10052-015-3576-5

Cited by 79 publications

(114 citation statements)

References 235 publications

(238 reference statements)

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“…Probing the mass ordering is an important goal of future experimental ν oscillation searches (see, e.g., [3,4]), with relevant implications on theoretical models for neutrino mass and mixing (see, e.g., [5][6][7]). At present, the four parameters δm 2 , |∆m 2 |, sin 2 θ 12 , and sin 2 θ 13 have been measured at the few % level, while sin 2 θ 23 (still affected by an octant ambiguity [8]) is less accurately known, at the level of ∼ 10% [1].…”

Section: Introductionmentioning

confidence: 99%

Global constraints on absolute neutrino masses and their ordering

et al. 2017

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Within the standard three-neutrino framework, the absolute neutrino masses and their ordering (either normal, NO, or inverted, IO) are currently unknown. However, the combination of current data coming from oscillation experiments, neutrinoless double beta (0νββ) decay searches, and cosmological surveys, can provide interesting constraints for such unknowns in the sub-eV mass range, down to O(10 −1 ) eV in some cases. We discuss current limits on absolute neutrino mass observables by performing a global data analysis, that includes the latest results from oscillation experiments, 0νββ decay bounds from the KamLAND-Zen experiment, and constraints from representative combinations of Planck measurements and other cosmological data sets. In general, NO appears to be somewhat favored with respect to IO at the level of ∼ 2σ, mainly by neutrino oscillation data (especially atmospheric), corroborated by cosmological data in some cases. Detailed constraints are obtained via the χ 2 method, by expanding the parameter space either around separate minima in NO and IO, or around the absolute minimum in any ordering. Implications for upcoming oscillation and non-oscillation neutrino experiments, including β-decay searches, are also discussed.

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Section: Introductionmentioning

confidence: 99%

Global constraints on absolute neutrino masses and their ordering

et al. 2017

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“…These operators contribute to the Higgs and flavon masses and hence also will participate in the one-loop running and also run themselves. For example, the flavon one-loop contribution will contribute a term of form λ (2,6) λ (0,6) to the β-function of λ (2,8) . All these contributions are of two-loop order and quantitatively not important to our analysis.…”

Section: Hierarchy Of Effective Field Theoriesmentioning

confidence: 99%

Vacuum stability of Froggatt-Nielsen models

Giese

Konstandin

2019

J. High Energ. Phys.

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We discuss vacuum stability in Froggatt-Nielsen (FN) models. One concern in FN models is that for large flavon VEVs the running of the quartic Higgs coupling is enhanced what might lead to a more severe instability compared to the Standard Model (SM). We study this issue using the renormalization-group improved scalar potential. Another issue is that the mixing between the Higgs and the flavon can potentially destabilize the potential. However, taking current bounds on the flavon phenomenology into account, we find that both effects do not lead to an instability that is more severe than in the SM.

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“…", referred to the muon. Today we know twelve fundamental matter particles [6], neatly classified in three generations that only differ by mass, with the muon belonging to the intermediate one; but Rabi's question is still waiting for an answer (its generalized modern version is known as "the flavour puzzle" [7]. )…”

Section: Introductionmentioning

confidence: 99%

Atmospheric muons as an imaging tool

2020

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Imaging methods based on the absorption or scattering of atmospheric muons, collectively named under the neologism "muography", exploit the abundant natural flux of muons produced from cosmic-ray interactions in the atmosphere. Recent years have seen a steep rise in the development of muography methods in a variety of innovative multidisciplinary approaches to study the interior of natural or man-made structures, establishing synergies between usually disconnected academic disciplines such as particle physics, geology, and archaeology. Muography also bears promise of immediate societal impact through geotechnical investigations, nuclear waste surveys, homeland security, and natural hazard monitoring. Our aim is to provide an introduction to this vibrant research area, starting from the physical principles at the basis of the methods and reviewing several recent developments in the application of muography methods to specific use cases, without any pretence of exhaustiveness. We then describe the main detector technologies and imaging methods, including their combination with conventional techniques from other disciplines, where appropriate. Finally, we discuss critically some outstanding issues that affect a broad variety of applications, and the current state of the art in addressing them. a

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Pieces of the flavour puzzle

Abstract: An overview of the flavour problem is presented, with emphasis on the theoretical efforts to find a satisfactory description of the fermion masses and the mixing angles.

Cited by 79 publications

References 235 publications

Global constraints on absolute neutrino masses and their ordering

Global constraints on absolute neutrino masses and their ordering

Vacuum stability of Froggatt-Nielsen models

Atmospheric muons as an imaging tool

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