Results 151 to 160 of about 1,123,394 (286)

Neutrino mixing contribution to the cosmological constant

, 2004
We show that the non-perturbative vacuum structure associated with neutrino mixing leads to a non-zero contribution to the value of the cosmological constant. Such a contribution comes from the specific nature of the mixing phenomenon.
A. Capolupo, Bahcall, Bilenky, Binger, Blasone, Blasone, Blasone, Blasone, Blasone, Blasone, Blasone, Blasone, Capozziello, Capozziello, Capozziello, Coleman, Fujii, Fujii, Fujii, Fujii, G. Vitiello, Gell-Mann, Hannabuss, Hannabuss, Ji, Ji, M. Blasone, Perlmutter, S. Capozziello, S. Carloni, Sahni, Shapiro, Shapiro, Shifman, Weinberg, Yokoyama, Zeldovich, Zeldovich   +37 more
core   +1 more source

Decoding Nature with Nature's Tools: Heterotic Line Bundle Models of Particle Physics with Genetic Algorithms and Quantum Annealing

Fortschritte der Physik, Volume 72, Issue 2, February 2024.
Abstract The string theory landscape may include a multitude of ultraviolet embeddings of the Standard Model, but identifying these has proven difficult due to the enormous number of available string compactifications. Genetic Algorithms (GAs) represent a powerful class of discrete optimisation techniques that can efficiently deal with the immensity of
Steve A. Abel, Andrei Constantin, Thomas R. Harvey, Andre Lukas, Luca A. Nutricati   +4 more
wiley   +1 more source

Δ(27) family symmetry and neutrino mixing

, 2015
The observed neutrino mixing, having a near maximal atmospheric neutrino mixing angle and a large solar mixing angle, is close to tri-bi-maximal. This structure may be related to the existence of a discrete non-Abelian family symmetry.
I. D. M. Varzielas
semanticscholar   +1 more source

Neutrino mixing with non-zero $\theta_{13}$ and CP violation in the 3-3-1 model based on $A_4$ flavor symmetry [PDF]

, 2014
We propose a 3-3-1 model with neutral fermions based on A4 flavor symmetry responsible for fermion masses and mixings with non-zero θ13. To get realistic neutrino mixing, we just add a new SU(3)L triplet (ρ) being in 3 under A4.
V. V. Vien, H. N. Long
semanticscholar   +1 more source

Solar neutrinos and neutrino mixing

Physics Letters B, 1976
Abstract The recent suggestion that mixing of many neutrino types accounts for the solar neutrino puzzle is discussed. We find that in general the suppression due to mixing of k species is by less than a factor k.
openaire   +2 more sources

Millimeter‐Wave WISP Search with Coherent Light‐Shining‐Through‐a‐Wall Toward the STAX Project

Annalen der Physik, Volume 536, Issue 1, January 2024.
This research article shows potential of millimeter waves for searching dark photons, one of the candidates of dark matter. By sharing a common reference signal, an excellent temporal coherency is achieved between production and detection of dark photons.
Akira Miyazaki, Tor Lofnes, Fritz Caspers, Paolo Spagnolo, John Jelonnek, Tobias Ruess, Johannes L. Steinmann, Manfred Thumm   +7 more
wiley   +1 more source

Neutrino masses and flavor mixing [PDF]

Modern Physics Letters A, 2010
We discuss the neutrino oscillations, using texture zero mass matrices for the leptons. The reactor mixing angle θl is calculated. The ratio of the masses of two neutrinos is determined by the solar mixing angle. We can calculate the masses of the three neutrinos: m1 ≈ 0.003 eV , m2 ≈ 0.012 eV , m3 ≈ 0.048 eV .
openaire   +5 more sources

Constraints on non-unitary neutrino mixing in light of atmospheric and reactor neutrino data

Journal of High Energy Physics
While the origin of neutrino masses remains unknown, several key neutrino mass generation models result in a non-unitary three-neutrino mixing matrix. To put such models to test, the deviations of the mixing matrix from unitarity can be measured directly
Tetiana Kozynets, Philipp Eller, Alan Zander, Manuel Ettengruber, D. Jason Koskinen   +4 more
doaj   +1 more source

Theory of neutrino slow flavor evolution. Part II. Space-time evolution of linear instabilities

Journal of High Energy Physics
Slow flavor evolution (defined as driven by neutrino masses and not necessarily “slow”) is receiving fresh attention in the context of compact astrophysical environments.
Damiano F. G. Fiorillo, Georg G. Raffelt
doaj   +1 more source

Non-zero θ13 and δCP phase with A4 flavor symmetry and deviations to tri-bi-maximal mixing via Z2 × Z2 invariant perturbations in the neutrino sector

Nuclear Physics B, 2022
In this work, a flavour theory of a neutrino mass model based on A4 symmetry is considered to explain the phenomenology of neutrino mixing. The spontaneous symmetry breaking of A4 symmetry in this model leads to tribimaximal mixing in the neutrino sector
Gayatri Ghosh
doaj