Notes on the spontaneous breaking of SU(N) and SO(N) via a second-rank tensor multiplet

Notes on the spontaneous breaking of SU ( N ) and SO ( N ) via a se ond - rank tensor multipletHoward

نظریه میدان ناجابه‌جایی و پارامترهای نقض لورنتس در QED

Non-commutative field theory as a theory including the Lorentz violation can be constructed in two different ways. In the first method, the non-commutative fields are the same as the ordinary ones while the gauge group is restricted to U(n). For example, the symmetry group of standard model in non-commutative space is U(3)×(2)×U(1) which can be reduced to SU(3)×SU(2)×U(1) by two appropriate spo...

Goldstone Superfield Actions in AdS5 backgrounds

Nonlinear realizations superfield techniques, pertinent to the description of partial breaking of global N = 2 supersymmetry in a flat d = 4 super Minkowski background, are generalized to the case of partially broken N = 1 AdS5 supersymmetry SU(2, 2|1). We present, in an explicit form, off-shell manifestly N = 1, d = 4 supersymmetric minimal Goldstone superfield actions for two patterns of part...

SO ( 10 ) GUTs in Higher Dimensions

We discuss supersymmetic SO(10) unified theories constructed in 6 dimensions. The breaking of SO(10) group is achieved by the orbifold compactification. In 4 dimensions we obtain a N = 1 supersymmetric standard model which gauge group is enlarged by an additional U(1) symmetry. This unbroken gauge group is obtained as intersection of the Pati-Salam and the Georgi-Glashow subgroups of SO(10). Th...

N=2 Supersymmetric Gut Breaking on T

We study the 6-dimensional N = 2 supersymmetric grand unified theories with gauge group SU(N) and SO(M) on the extra space orbifolds T /(Z2) 3 and T /(Z2) 4, which can be broken down to the 4-dimensional N = 1 supersymmetric SU(3)×SU(2)×U(1)n−3 model for the zero modes. We also study the models which have two SU(2) Higgs doublets (zero modes) from the 6dimensional vector multiplet. We give the ...