Article

Cosmic strings in string perturbation theory

Cripps Center for Astronomy and Particle Theory, School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, UK
Fortschritte der Physik (impact factor: 1.16). 03/2011; 59(7‐8):762 - 768. DOI:10.1002/prop.201100025 pp.762 - 768

ABSTRACT Fundamental cosmic superstrings are defined in string perturbation theory in terms of vertex operators, which are loosely identified with arbitrarily excited macroscopic string states. We construct explicit normal ordered cosmic string vertex operators, which are given in terms of covariant coherent string states. We also write down the general expression for arbitrarily excited mass-eigenstate covariant vertex operators, and discuss the construction of string wavepackets.

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Keywords

cosmic string vertex operators
 
covariant coherent string states
 
Fundamental cosmic superstrings
 
macroscopic string states
 
mass-eigenstate covariant vertex operators
 
string perturbation theory
 
vertex operators
 

D. Skliros