We present a level (10,30) numerical computation of the spectrum of quadratic fluctuations of open string field theory around the tachyonic vacuum, both in the scalar and in the vector sector. Our results are consistent with Sen’s conjecture about gauge-triviality of the small excitations. The computation is sufficiently accurate to provide robust evidence for the absence of the photon from the open string spectrum. We also observe that ghost string field propagators develop double poles. We show that this requires non- empty BRST cohomologies at non-standard ghost numbers. We comment about the relations of our results with recent work on the same subject.

The spectrum of open string field theory at the stable tachyonic vacuum

IMBIMBO, CAMILLO
2007

Abstract

We present a level (10,30) numerical computation of the spectrum of quadratic fluctuations of open string field theory around the tachyonic vacuum, both in the scalar and in the vector sector. Our results are consistent with Sen’s conjecture about gauge-triviality of the small excitations. The computation is sufficiently accurate to provide robust evidence for the absence of the photon from the open string spectrum. We also observe that ghost string field propagators develop double poles. We show that this requires non- empty BRST cohomologies at non-standard ghost numbers. We comment about the relations of our results with recent work on the same subject.
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: http://hdl.handle.net/11567/216165
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 18
  • ???jsp.display-item.citation.isi??? 19
social impact