DC pole | Wartość | Język |
dc.contributor.author | Flieger, Wojciech | - |
dc.contributor.author | Gluza, Janusz | - |
dc.contributor.author | Porwit, Kamil | - |
dc.date.accessioned | 2020-04-16T11:42:48Z | - |
dc.date.available | 2020-04-16T11:42:48Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | "Journal of High Energy Physics" Vol. 2020, iss. 3 (2020), art. no 169 | pl_PL |
dc.identifier.issn | 1029-8479 | - |
dc.identifier.uri | http://hdl.handle.net/20.500.12128/13530 | - |
dc.description.abstract | Singular values are used to construct physically admissible 3-dimensional mix-
ing matrices characterized as contractions. Depending on the number of singular values
strictly less than one, the space of the 3-dimensional mixing matrices can be split into
four disjoint subsets, which accordingly corresponds to the minimal number of additional,
non-standard neutrinos. We show in numerical analysis that taking into account present
experimental precision and fits to different neutrino mass splitting schemes, it is not pos-
sible to distinguish, on the level of 3-dimensional mixing matrices, between two and three
extra neutrino states. It means that in 3+2 and 3+3 neutrino mixing scenarios, using the
so-called α parametrization, ranges of non-unitary mixings are the same. However, on the
level of a complete unitary 3+1 neutrino mixing matrix, using the dilation procedure and
the Cosine-Sine decomposition, we were able to shrink bounds for the \light-heavy" mixing
matrix elements. For instance, in the so-called seesaw mass scheme, a new upper limit on
jUe4j is about two times stringent than before and equals 0.021. For all considered mass
schemes the lowest bounds are also obtained for all mixings, i.e. |Ue4|, |Uμ4|, |Uτ4|. New
results obtained in this work are based on analysis of neutrino mixing matrices obtained
from the global fits at the 95% CL. | pl_PL |
dc.language.iso | en | pl_PL |
dc.rights | Uznanie autorstwa 3.0 Polska | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/pl/ | * |
dc.subject | Neutrino Physics | pl_PL |
dc.subject | Beyond Standard Model | pl_PL |
dc.title | New limits on neutrino non-unitary mixings based on prescribed singular values | pl_PL |
dc.type | info:eu-repo/semantics/article | pl_PL |
dc.identifier.doi | 10.1007/JHEP03(2020)169 | - |
Pojawia się w kolekcji: | Artykuły (WNŚiT)
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