Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2008-07-26
Phys.Rev.D78:105015,2008
Physics
High Energy Physics
High Energy Physics - Theory
24 pages, 4 figures
Scientific paper
10.1103/PhysRevD.78.105015
We discuss corrections to the Yukawa matrices of the Standard Model (SM) fermions in intersecting D-brane models due to four-point interactions. Recently, an intersecting D-brane model has been found where it is possible to obtain correct masses and mixings for all quarks as well as the tau lepton. However, the masses for the first two charged leptons come close to the right values but are not quite correct. Since the electron and muon are quite light, it is likely that there are additional corrections to their masses which cannot be neglected. With this in mind, we consider contributions to the SM fermion mass matrices from four-point interactions. In an explicit model, we show that it is indeed possible to obtain the SM fermion masses and mixings which are a better match to those resulting from experimental data extrapolated at the unification scale when these corrections are included. These corrections may have broader application to other models.
Chen Ching-Ming
Li Tiancheng
Mayes Van E.
Nanopoulos Dimitri V.
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