首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Extensions of string theories
Authors:R Amorim  J Barcelos-Neto
Institution:1. Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21945, Rio de Janeiro, Brasil
Abstract:With the motivation that critical dimensionsD≠4 might be suggesting that string theories have not been completely formulated, we study more general alternatives. We first consider a direct extension in the world-sheet formulation withN B bosons andN F fermions and analyze the conditions for canceling the anomaly in all possible combinations ofN B ,N F andD. Later on we incorporate degrees of freedom of antisymmetric tensors to the previous model. The only possibility to cancel the anomaly in this case is withN B =N F =1 and the our everyday spacetime dimensionD=4.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号