2010/05/26 by N. D. Hari Dass, Dass, N. D. Hari
Computer Science · Physics and Astronomy · #Black Holes and Theoretical Physics #Computational Physics and Python Applications #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Theory (hep-th) #hep-lat #hep-th
paper · pdf · doi:10.48550/arxiv.1005.4829
10 pages in LaTeX2e prepared in JHEP style
arxiv created 2010/05/26 · openalex publication_date 2010/05/26 · arxiv updated 2010/05/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Centre of mass momentum for strings is an important ingredient in the calculation of the spectrum of string theories. It is calculated by the Nöther prescription for two types of conformally invariant effective string theories of the Polchinski-Strominger type. One is the so called Polyakov-Liouville theory \citeliouville and the other an extension of the original Polchinski-Strominger action analysed upto order R-3 where 2πR is the length of the string. In the first case analysis is carried out to order R-2 and in the second case to order R-3. In both cases the correction to the free bosonic theory result is shown to be of the \em improvement type so that the correction to the total string momentum, obtained by integrating over the spatial coordinate of the string world sheet, vanishes.