4,550 research outputs found
Multi-Instantons in Higher Dimensions and Superstring Solitons
We construct octonionic multi-instantons for the eight and seven dimensional
Yang-Mills theory. Extended soliton solutions to the low-energy heterotic field
theory equations of motion are constructed from these octonionic
multi-instantons. The solitons describe a string in ten-dimensional Minkowski
space, and preserve one and two of the sixteen space-time supersymmetries
correspondingly.Comment: Published in SIGMA (Symmetry, Integrability and Geometry: Methods and
Applications) at http://www.emis.de/journals/SIGMA
On a construction of self-dual gauge fields in seven dimensions
We consider gauge fields associated with a semisimple Malcev algebra. We
construct a gauge-invariant Lagrangian and found a solution of modified
Yang-Mills equations in seven dimensions.Comment: 10 pages, LaTeX, no figure
Multi-instantons in seven dimensions
We consider the self-dual Yang-Mills equations in seven dimensions. Modifying
the t'Hooft construction of instantons in , we find -instanton
solutions which depend on effective parameters and are -invariant.Comment: 9 pages, LaTeX, no figure
Standard Model gauge coupling unification
We study the low energy evolution of coupling constants of the standard model
and show that gauge coupling unification can be achieved at the electroweak
scale with a suitable normalization. We choose the grand unification group to
be the semidirect product of Spin(8) by S_3. In this case the three low energy
gauge couplings and the two scalar self-couplings are determined in terms of
two independent parameters. In particular, it gives a precise prediction for
the mass of the Higgs boson.Comment: 17 page, LaTeX, no figure
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