2003/10/31 by Diego Chialva, Roberto Iengo, Jorge G. Russo +1 · 5 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Quantum Chromodynamics and Particle Interactions #Quantum many-body systems #hep-ph #hep-th
paper · pdf · doi:10.1088/1126-6708/2003/12/014
published as JHEP 0312 (2003) 014 · Latex, 5 figures, 35 pages (= 23 pages + appendices). Minor corrections
arxiv created 2003/11/12 · openalex publication_date 2003/12/11 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We find a one-parameter family of long-lived physical string states in type II superstring theory. We compute the decay rate by an exact numerical evaluation of the imaginary part of the one-loop propagator. Remarkably, the lifetime rapidly increases with the mass. We find a power-law dependence of the form T = const. g-2 Massα, where the value of α depends on the parameter characterizing the state. For the most stable state in this family, one has α~= 5. The dominant decay channel of these massive string states is by emission of soft massless particles. The quantum states can be viewed semiclassically as closed strings which cannot break during the classical evolution.