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−2Massα, 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.

Decay of long-lived massive closed superstring states: exact results / Chialva, D; Iengo, R; Russo, Jg. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2003:12(2003), pp. 1-25. [10.1088/1126-6708/2003/12/014]

Decay of long-lived massive closed superstring states: exact results

Iengo, R;
2003-01-01

Abstract

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−2Massα, 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.
2003
2003
12
1
25
014
https://arxiv.org/abs/hep-th/0310283
Chialva, D; Iengo, R; Russo, Jg
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/30201
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 37
  • ???jsp.display-item.citation.isi??? 33
social impact