Sectors in String theory and the N-S N-S sector

[robousy]

Hey folks,

Can somone explain what is meant by a 'sector' in string theory, or provide links/refs. I've tried a search on google and xxx.lanl.gov but nothing very useful turns up.

Also, what is the N-S N-S sector (I know it stands for Neveu Schwarz). I think its a description of fermions that are periodic / anti periodic on a closed string, is this about right??

Any help appreciated!

 

[Demystifier]

For a good pedagogic free online introduction to string theory, including the explanation of sectors (Sec. 5.2), see:
http://lanl.arxiv.org/abs/hep-th/0207142

 

[robousy]

Great, looks like what I'm looking for. Thanks demystifier!