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SUMMARY:Covariant vertex operators for cosmic strings - Dimitri Skliros\, 
 University of Sussex
DTSTART:20100312T130000Z
DTEND:20100312T140000Z
UID:TALK23585@talks.cam.ac.uk
CONTACT:David Kubiznak
DESCRIPTION:I will discuss the first construction of coherent states (and 
 other massive states with arbitrarily excited harmonics) in the covariant 
  formalism for both open and closed strings with applications to cosmic st
 rings in\nmind. Furthermore\, I provide an explicit map that relates three
  different descriptions of cosmic strings: classical strings\,  lightcone 
 gauge quantum states and covariant vertex operators\, highlighting the  vi
 rtues\nand shortcomings of each.  I will then go on to discuss  applicatio
 ns and future directions: string amplitude computations with such vertices
  and in particular decays of (the phenomenologically promising) cosmic  st
 rings with non-degenerate cusps in a framework that naturally incorporates
  the  effects of gravitational backreaction.\nThe talk is partly based on 
 arXiv:0911.5354.
LOCATION:Pavilion B Potter Room (B1.19)
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