Brane fusion in the bosonic string and the emergence of fermionic strings
Abstract
We review the emergence of the tendimensional fermionic closed string theories from subspaces of the Hilbert space of the 26dimensional bosonic closed string theory compactified on an E_{8} × SO(16) lattice. They arise from a consistent truncation procedure which generates spacetime fermions out of bosons. This procedure is extended to open string sectors. We prove that truncation of the unique tadpolefree SO(2^{13}) bosonic string theory compactified on the above lattice determines the anomaly free ChanPaton group of the typeI theory and the consistent ChanPaton groups of typeO theories. It also predicts the tension of spacefilling Dbranes in these fermionic theories. The derivation of these fermionic string properties from bosonic considerations alone points towards a dynamical origin of the truncation process. Spacetime fermions and supersymmetries would then arise from bosonic degrees of freedom and no fermionic degrees of freedom would be needed in a fundamental theory of quantum gravity.
 Publication:

Journal of High Energy Physics
 Pub Date:
 August 2001
 DOI:
 10.1088/11266708/2001/08/013
 arXiv:
 arXiv:hepth/0106235
 Bibcode:
 2001JHEP...08..013E
 Keywords:

 High Energy Physics  Theory
 EPrint:
 44 pages, Latex 2e