closed string tachyons
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2020 ◽  
Vol 2020 (8) ◽  
Author(s):  
Raffaele Marotta ◽  
Matin Mojaza

Abstract We calculate the simultaneous double-soft limit of two massless closed strings scattering with any number of closed string tachyons to the subleading order at the tree level. The limit factorizes the scattering amplitude into a double-soft factor multiplying the pure tachyon subamplitude, suggesting a universal double-soft theorem for the massless closed string. We confirm an existing result for the double-soft graviton in an on-shell equivalent, but different form, while also establishing the double-soft factorization behavior of the string dilaton and of the Kalb-Ramond state, as well as the mixed graviton-dilaton case. We also show that the simultaneous and consecutive double-soft theorems are consistent with each other. We furthermore provide a complete field theory diagrammatic view on our result, which enables us in particular to establish a four-point interaction vertex for two tachyons and two massless closed string states, as well as the missing in field theory of three-point interaction of two massless closed string state and one tachyon.


2007 ◽  
Vol 2007 (09) ◽  
pp. 021-021 ◽  
Author(s):  
Yasuaki Hikida ◽  
Norihiro Iizuka

2007 ◽  
Vol 2007 (01) ◽  
pp. 090-090 ◽  
Author(s):  
Tatsuma Nishioka ◽  
Tadashi Takayanagi

2006 ◽  
Vol 2006 (01) ◽  
pp. 054-054 ◽  
Author(s):  
Yasuaki Hikida ◽  
Ta-Sheng Tai

2005 ◽  
Vol 2005 (11) ◽  
pp. 038-038 ◽  
Author(s):  
Anatoly Dymarsky ◽  
Igor R Klebanov ◽  
Radu Roiban

2005 ◽  
Vol 20 (20n21) ◽  
pp. 4699-4795 ◽  
Author(s):  
PAOLO DI VECCHIA ◽  
ANTONELLA LICCARDO ◽  
RAFFAELE MAROTTA ◽  
FRANCO PEZZELLA

In this paper we review the conditions for the validity of the gauge/gravity correspondence in both supersymmetric and nonsupersymmetric string models. We start by reminding what happens in type IIB theory on the orbifolds ℂ2/ℤ2and ℂ3/(ℤ2x ℤ2), where this correspondence beautifully works. In these cases, by performing a complete stringy calculation of the interaction among D3-branes, it has been shown that the fact that this correspondence works is a consequence of the open/closed duality and of the absence of threshold corrections. Then we review the construction of type 0 theories with their orbifolds and orientifolds having spectra free from both open and closed string tachyons and for such models we study the validity of the gauge/gravity correspondence, concluding that this is not a peculiarity of supersymmetric theories, but it may work also for nonsupersymmetric models. Also in these cases, when it works, it is again a consequence of the open/closed string duality and of vanishing threshold corrections.


2005 ◽  
Vol 2005 (08) ◽  
pp. 046-046 ◽  
Author(s):  
Haitang Yang ◽  
Barton Zwiebach

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