Tachyon condensation in boundary string field theory at one loop
Abstract
We compute the oneloop partition function for quadratic tachyon background in open string theory. Both closed and open string representations are developed. Using these representations we study the oneloop divergences in the partition function in the presence of the tachyon background. The divergences due to the open and closed string tachyons are treated by analytic continuation in the tachyon mass squared. We pay particular attention to the imaginary part of the analytically continued expressions. The last one gives the decay rate of the unstable vacuum. The dilaton tadpole is also given some partial consideration. The partition function is further used to study corrections to tachyon condensation processes describing brane descent relations. Assuming the boundary string field theory prescription for construction of the string field action via partition function holds at one loop level we study the oneloop corrections to the tachyon potential and to the tensions of lowerdimensional branes.
 Publication:

arXiv eprints
 Pub Date:
 May 2001
 arXiv:
 arXiv:hepth/0105098
 Bibcode:
 2001hep.th....5098B
 Keywords:

 High Energy Physics  Theory
 EPrint:
 30 pages, Latex