2010/02/28 by P. Anastasopoulos, G. K. Leontaris, N. D. Vlachos · 5 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Context (archaeology) #Fermion #Higgs boson #Higgs field #Higgs mechanism #Instanton #Mixing (physics) #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #Symmetry breaking #Yukawa potential #hep-ph #hep-th
paper · pdf · doi:10.1007/jhep05(2010)011
published in Journal of High Energy Physics 2010(5) (Springer Nature) · 50 pages, 3 figures (v2 - Minor corrections)
arxiv created 2010/04/20 · openalex publication_date 2010/05/01 · arxiv updated 2015/05/18 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In the present work, we perform a phenomenological analysis of the effective low energy models with Pati-Salam (PS) gauge symmetry derived in the context of D-branes. The main issue in these models arises from the fact that the right-handed fermions and the PS-symmetry breaking Higgs field transform identically under the symmetry, causing unnatural matter-Higgs mixing effects. We argue that this problem can be solved in particular D-brane setups where these fields arise in different intersections. We further observe that whenever a large Higgs mass term is being generated in a particular class of mass spectra, a splitting mechanism –reminiscent of the doublet triplet splitting– may protect the neutral Higgs components from becoming heavy. We analyze the implications of each individual representation available in these models in order to specify the minimal spectrum required to build up a consistent model that reconciles the low energy data. A short discussion is devoted to the effects of stringy instanton corrections, particularly those generating missing Yukawa couplings and contributing to the fermion mass textures. We discuss the correlations of the intersecting D-brane spectra with those obtained from Gepner constructions and analyze the superpotential, the resulting mass textures and the low energy implications of some examples of the latter along the lines proposed above.