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Brane fusion in the bosonic string and the emergence of fermionic strings

par Englert, François ;Houart, Laurent ;Taormina, Anne
Référence The journal of high energy physics (Online), 5, 8, page (XXIII-34)
Publication Publié, 2001

Article révisé par les pairs

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Résumé :

We review the emergence of the ten-dimensional fermionic closed string theories from subspaces of the Hubert space of the 26-dimensional bosonic closed string theory compactified on an E8 × SO(16) lattice. They arise from a consistent truncation procedure which generates space-time fermions out of bosons. This procedure is extended to open string sectors. We prove that truncation of the unique tadpole-free SO(213) bosonic string theory compactified on the above lattice determines the anomaly free Chan-Paton group of the type-I theory and the consistent Chan-Paton groups of type-O theories. It also predicts the tension of space-filling D-branes in these fermionic theories. The derivation of these fermionic string properties from bosonic considerations alone points towards a dynamical origin of the truncation process. Space-time fermions and super symmetries would then arise from bosonic degrees of freedom and no fermionic degrees of freedom would be needed in a fundamental theory of quantum gravity.