Phenomenology of lepton masses and mixing with discrete flavor symmetries
The observed pattern of fermion masses and mixing is an outstanding puzzle in particle
physics, generally known as the flavor problem. Over the years, guided by precision neutrino …
physics, generally known as the flavor problem. Over the years, guided by precision neutrino …
Model-independent constraints on non-unitary neutrino mixing from high-precision long-baseline experiments
A bstract Our knowledge on the active 3ν mixing angles (θ 12, θ 13, and θ 23) and the CP
phase δ CP is becoming accurate day-by-day enabling us to test the unitarity of the leptonic …
phase δ CP is becoming accurate day-by-day enabling us to test the unitarity of the leptonic …
Constraining non-unitary neutrino mixing using matter effects in atmospheric neutrinos at INO-ICAL
A bstract The mass-induced neutrino oscillation is a well established phenomenon that is
based on the unitary mixing among three light active neutrinos. Remarkable precision on …
based on the unitary mixing among three light active neutrinos. Remarkable precision on …
New limits on neutrino non-unitary mixings based on prescribed singular values
W Flieger, J Gluza, K Porwit - Journal of High Energy Physics, 2020 - Springer
A bstract Singular values are used to construct physically admissible 3-dimensional mixing
matrices characterized as contractions. Depending on the number of singular values strictly …
matrices characterized as contractions. Depending on the number of singular values strictly …
General neutrino mass spectrum and mixing properties in seesaw mechanisms
W Flieger, J Gluza - Chinese Physics C, 2021 - iopscience.iop.org
Neutrinos stand out among the elementary particles because of their unusually small
masses. Various seesaw mechanisms attempt to explain this fact. In this work, applying …
masses. Various seesaw mechanisms attempt to explain this fact. In this work, applying …
Geometry of the neutrino mixing space
W Flieger, J Gluza - Physical Review D, 2022 - APS
We study the geometric structure of the physical region of neutrino mixing matrices as part of
the unit ball of the spectral norm. Each matrix from the geometric region is a convex …
the unit ball of the spectral norm. Each matrix from the geometric region is a convex …
[PDF][PDF] Constraints on neutrino mixing from matrix theory
W Flieger - 2021 - opus.us.edu.pl
One of the long-standing puzzles in neutrino physics concerns the number of neutrino
flavours in nature. So far the existence of three types of active neutrinos has been …
flavours in nature. So far the existence of three types of active neutrinos has been …
Studies of non-standard particle mixings through singular values
W Flieger, K Porwit, JL Gluza - Acta Physica Polonica B, 2019 - opus.us.edu.pl
Singular values provide a method to study mixing matrices in particle physics. The methods
of unitary dilations and the cosine–sine matrix decomposition are discussed in the …
of unitary dilations and the cosine–sine matrix decomposition are discussed in the …
Matrix norms and search for sterile neutrinos
W Flieger, F Pindel, K Porwit - arxiv preprint arxiv:1904.10649, 2019 - arxiv.org
Matrix norms can be used to measure the" distance" between two matrices which translates
naturally to the problem of calculating the unitary deviation of the neutrino mixing matrices …
naturally to the problem of calculating the unitary deviation of the neutrino mixing matrices …
New constraints on heavy neutral leptons coming from oscillation data analysis and precision e+ e-physics
W Flieger, KG Grzanka - PoS-Proceedings of Science, 2021 - opus.us.edu.pl
The current experimental data does not exclude the possibility that additional sterile
neutrinos exist. We discuss two methods to determine active-sterile neutrino mixing. Firstly …
neutrinos exist. We discuss two methods to determine active-sterile neutrino mixing. Firstly …