Can (noncommutative) geometry accommodate leptoquarks? art. no. 035003.

We investigate the geometric interpretation of the standard model based on noncommutative geometry. It is pointed out that real spectral triples, i.e. , triples satisfying the reality structure J, can nevertheless contain spec ific and well-defined couplings of lepton doublets to right-handed up antiq uarks, via scalar leptoquarks. We explore in detail the consequences of the possible existence of such leptoquarks, both for the Connes-Lott and the s pectral action, and compare with physical bounds. For either case the resul ts are in contradiction with experimental information. [S0556-2821(99)08101 -1].