Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory leading to the potential causality violations recently pointed out by Camanho et al.~cite{Camanho:2014apa}. We analyze in detail this question by considering high-energy string-brane collisions at impact parameters $b le l_s$ (the string-length parameter) with $l_s gg R_p$ (the characteristic scale of the D$p$-brane geometry). If we keep only the contribution of the massless states causality is violated for a set of initial states whose polarization is suitably chosen with respect to the impact parameter vector. Such violations are instead neatly avoided when the full structure of string theory --and in particular its Regge behavior-- is taken into account.

Regge behavior saves String Theory from causality violations

D'APPOLLONIO, GIUSEPPE
Primo
;
2015-01-01

Abstract

Higher-derivative corrections to the Einstein-Hilbert action are present in bosonic string theory leading to the potential causality violations recently pointed out by Camanho et al.~cite{Camanho:2014apa}. We analyze in detail this question by considering high-energy string-brane collisions at impact parameters $b le l_s$ (the string-length parameter) with $l_s gg R_p$ (the characteristic scale of the D$p$-brane geometry). If we keep only the contribution of the massless states causality is violated for a set of initial states whose polarization is suitably chosen with respect to the impact parameter vector. Such violations are instead neatly avoided when the full structure of string theory --and in particular its Regge behavior-- is taken into account.
2015
D-branes; Bosonic strings; Models of quantum gravity
File in questo prodotto:
File Dimensione Formato  
causality.pdf

accesso aperto

Tipologia: versione editoriale (VoR)
Dimensione 532.08 kB
Formato Adobe PDF
532.08 kB Adobe PDF Visualizza/Apri

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/11584/60180
 Attenzione

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

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 57
  • ???jsp.display-item.citation.isi??? 57
social impact