Results 31 to 40 of about 73,713 (196)
Particle asymmetries in the early universe [PDF]
, 2010 The total lepton asymmetry $l=\sum_f l_f$ in our universe is only poorly constrained by theories and experiments. It might be orders of magnitudes larger than the observed baryon asymmetry $b\simeq {\cal O}(10^{-10})$, $|l|/b \leq {\cal O}(10^{9})$.
Boeckel +19 more
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Minimal mixing of quarks and leptons in the SU(3) theory of flavour [PDF]
Nuclear Physics B, 2002 52 pages, LaTex, no figures; some typos corrected; journal ...
Chkareuli, J.L. +2 more
openaire +3 more sources
Quarks at the modular S 4 cusp
Journal of High Energy Physics, 2023 We analyse the possibility of describing quark masses, mixing and CP violation in S 4 ′ $$ {S}_4^{\prime } $$ modular flavour models without flavons. We focus on the case where the closeness of the modulus to the point of residual ℤ 3 ST $$ {\mathbb{Z ...
I. de Medeiros Varzielas +3 more
doaj +1 more source
SO(10) × S4 grand unified theory of flavour and leptogenesis
Journal of High Energy Physics, 2017 Abstract We propose a Grand Unified Theory of Flavour, based on SO(10) together with a non-Abelian discrete group S4, under which the unified three quark and lepton 16-plets are unified into a single triplet 3′. The model involves a further discrete group ℤ 4 R
Francisco J. de Anda +2 more
openaire +4 more sources
Microscopic Dirac Spectrum in a 2d Gauge Theory with Zero Chiral Condensate
, 2013 Fermionic theories with a vanishing chiral condensate (in the chiral limit) have recently attracted considerable interest; in particular variants of multi-flavour QCD are candidates for this behaviour.
Bietenholz, Wolfgang +2 more
core +1 more source
Unoriented Quivers with Flavour [PDF]
, 2014 We discuss unoriented quivers with flavour that arise from D3-branes at local orbifold singularities, in the presence of Omega-planes and non-compact D7-branes.
Bianchi, Massimo +3 more
core +2 more sources
From Nonstandard Analysis to Various Flavours of Computability Theory [PDF]
, 2017 As suggested by the title, it has recently become clear that theorems of Nonstandard Analysis (NSA) give rise to theorems in computability theory (no longer involving NSA). Now, the aforementioned discipline divides into classical and higher-order computability theory, where the former (resp.
openaire +2 more sources
NNLO positivity bounds on chiral perturbation theory for a general number of flavours
Journal of High Energy Physics, 2022 Abstract We present positivity bounds, derived from the principles of analyticity, unitarity and crossing symmetry, that constrain the low-energy constants of chiral perturbation theory. Bounds are produced for 2, 3 or more flavours in meson-meson scattering with equal meson masses, up to and including next-to-next-to-leading order
Benjamin Alvarez +2 more
openaire +4 more sources
Sequential Flavour Symmetry Breaking
, 2009 The gauge sector of the Standard Model (SM) exhibits a flavour symmetry which allows for independent unitary transformations of the fermion multiplets. In the SM the flavour symmetry is broken by the Yukawa couplings to the Higgs boson, and the resulting
A. Weiler +6 more
core +1 more source
Phenomenology of neutrino physics in the Kaluza-Klein theories of low scale gravity [PDF]
, 2001 We discuss the phenomenological consequences of theories which describe sterile neutrinos in large extra dimensions. We show that the Kaluza-Klein tower of the singlet neutrinos, albeit tiny individual contribution in electroweak processes, act ...
A.N. Ioannisian +7 more
core +3 more sources