منابع مشابه
Fermion Masses from SO(10) Hermitian Matrices
Masses of fermions in the SO(10) 16-plet are constructed using only the 10, 120 and 126 scalar multiplets. The mass matrices are restricted to be hermitian and the theory is constructed to have certain assumed quark masses,charged lepton masses and CKM matrix in accord with data. The remaining free parameters are found by fitting to light neutrino masses and MSN matrices result as predictions.
متن کاملMasses From Novel Fat - Link Fermion Actions
The hadron mass spectrum is calculated in lattice QCD using a novel fatlink clover fermion action in which only the irrelevant operators in the fermion action are constructed using smeared links. The simulations are performed on a 16 × 32 lattice with a lattice spacing of a = 0.125 fm. We compare actions with n = 4 and 12 smearing sweeps with a smearing fraction of 0.7. The n = 4 Fat-Link Irrel...
متن کاملSymmetries and fermion masses
We discuss whether quark, charged lepton and neutrino masses and mixing angles may be related by an extended flavour and family symmetry group. We show that current measurements of all fermion masses and mixing angles are consistent with a combination of an underlying SU(3) family symmetry together with a GUT symmetry such as SO(10). In this the near bi-maximal mixing observed in the neutrino s...
متن کاملFermion Masses in Susy Guts
We discuss the fermion mass problem in SUSY GUTs, including such ideas as texture zeroes, and Georgi-Jarlskog textures. We focus on a specific supersymmetric model based on the gauge group SU(4)⊗SU(2)L ⊗SU(2)R. In this model the gauge group is broken to that of the standard model at 10 GeV, and supersymmetry is broken at low-energy. The model may be regarded as a “surrogate SUSY GUT”, and has s...
متن کاملHiggsless fermion masses and unitarity
We discuss the consistency of fermion mass generation by boundary conditions and brane localized terms in higher dimensional Higgsless models of gauge symmetry breaking. The sum rules imposed by tree-level unitarity and Ward Identities are applied to check the consistency of mass generation by orbifold projections and more general boundary conditions consistent with the variational principle. W...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 1990
ISSN: 0370-2693
DOI: 10.1016/0370-2693(90)90529-f