Light-cone gauge superstring field theory in a linear dilaton background

Ishibashi, Nobuyuki

doi:10.1093/ptep/ptx012

Cited by 6 publications

(8 citation statements)

References 59 publications

(96 reference statements)

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“…However light-cone superstring field theory suffers from contact term divergences which have not yet been understood fully [26][27][28][29]. A way to circumvent this has been suggested in [30]. also describe how our analysis can be easily extended to compactified string theories.…”

Section: Jhep11(2016)050mentioning

confidence: 99%

One loop mass renormalization of unstable particles in superstring theory

Sen

2016

J. High Energ. Phys.

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Most of the massive states in superstring theory are expected to undergo mass renormalization at one loop order. Typically these corrections should contain imaginary parts, indicating that the states are unstable against decay into lighter particles. However in such cases, direct computation of the renormalized mass using superstring perturbation theory yields divergent result. Previous approaches to this problem involve various analytic continuation techniques, or deforming the integral over the moduli space of the torus with two punctures into the complexified moduli space near the boundary. In this paper we use insights from string field theory to describe a different approach that gives manifestly finite result for the mass shift satisfying unitarity relations. The procedure is applicable to all states of (compactified) type II and heterotic string theories. We illustrate this by computing the one loop correction to the mass of the first massive state on the leading Regge trajectory in SO(32) heterotic string theory.

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Section: Jhep11(2016)050mentioning

confidence: 99%

One loop mass renormalization of unstable particles in superstring theory

Sen

2016

J. High Energ. Phys.

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“…We shall now discuss how superstring field theory establishes this relation following the analysis of [26][27][28]. Alternative approach based on light-cone string field theory has been pursued in [2], but this suffers from the contact term ambiguities [90][91][92][93][94][95]. Ref.…”

Section: Wilsonian Effective Actionmentioning

confidence: 99%

“…While our approach will be based on a manifestly Lorentz covariant formulation of superstring field theory, there is an alternative approach, known as light-cone string field theory, that only manifestly preserves the SO(d − 1) subgroup of the SO(d, 1) Lorentz group. This approach has been successful for bosonic string theory [88,89], but there are various contact term ambiguities when we consider superstring field theory which have not been completely resolved [90][91][92][93][94][95][96].…”

Section: Introductionmentioning

confidence: 99%

Closed superstring field theory and its applications

Lacroix

Erbin

Kashyap

et al. 2017

Int. J. Mod. Phys. A

115

190

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We review recent developments in the construction of heterotic and type II string field theories and their various applications. These include systematic procedures for determining the shifts in the vacuum expectation values of fields under quantum corrections, computing renormalized masses and S-matrix of the theory around the shifted vacuum and a proof of unitarity of the S-matrix. The S-matrix computed this way is free from all divergences when there are more than 4 non-compact space-time dimensions, but suffers from the usual infrared divergences when the number of non-compact space-time dimensions is 4 or less.

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“…In a previous paper [13], we have shown that these divergences can be dealt with by dimensional regularization. In the case of type II superstrings, for example, one formulates a light-cone gauge superstring field theory in noncritical dimensions or the one whose worldsheet theory for transverse variables is a superconformal field theory with central charge c = 12 [14]. Although Lorentz invariance is broken by doing so, it does not cause so much trouble because the light-cone gauge theory is a completely gauge-fixed theory.…”

Section: Introductionmentioning

confidence: 99%

Multiloop amplitudes of light-cone gauge superstring field theory: odd spin structure contributions

Ishibashi

Murakami

2018

J. High Energ. Phys.

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We study the odd spin structure contributions to the multiloop amplitudes of light-cone gauge superstring field theory. We show that they coincide with the amplitudes in the conformal gauge with two of the vertex operators chosen to be in the pictures different from the standard choice, namely (−1, −1) picture in the type II case and −1 picture in the heterotic case. We also show that the contact term divergences can be regularized in the same way as in the amplitudes for the even structures and we get the amplitudes which coincide with those obtained from the first-quantized approach.

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Light-cone gauge superstring field theory in a linear dilaton background

Cited by 6 publications

References 59 publications

One loop mass renormalization of unstable particles in superstring theory

One loop mass renormalization of unstable particles in superstring theory

Closed superstring field theory and its applications

Multiloop amplitudes of light-cone gauge superstring field theory: odd spin structure contributions

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