RNS derivation of N-point disk amplitudes from the revisited S-matrix approach

Barreiro, Luiz Antônio; Medina, R.

doi:10.1016/j.nuclphysb.2014.07.015

Cited by 51 publications

(55 citation statements)

References 48 publications

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“…As a simple check for this formula let us point out that using the factorization properties of the reduced Pfaffian: 20) it is straightforward to show that the formula factorizes correctly. Another simple check is to focus on the 4-dimensional MHV amplitudes.…”

Section: Conformal Gravity Amplitudesmentioning

confidence: 99%

“…Indeed, the current-algebra part of the heterotic model is inert in the gravity sector, which implies that the cohomology and correlation functions are the same as those in the (Ψ, 0) model. In particular, the (Ψ, 0) model also contains the unexpected (from the Einstein-gravity point of view) massless 3-form first encountered in [4], whose picture-number −1 vertex operator is given by 20) with p µ A µνρ = 0. Therefore, we conclude that the gravity sector of the heterotic ambitwistor string describes conformal supergravity, and it is then natural to interpret that theory as a generalization of Witten's twistor string theory.…”

Section: Jhep11(2017)052mentioning

confidence: 99%

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Ambitwistor formulations of R2 gravity and (DF)2 gauge theories

Azevedo

Engelund

2017

J. High Energ. Phys.

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We consider D-dimensional amplitudes in R 2 gravities (conformal gravity in D = 4) and in the recently introduced (DF ) 2 gauge theory, from the perspective of the CHY formulae and ambitwistor string theory. These theories are related through the BCJ double-copy construction, and the (DF ) 2 gauge theory obeys color-kinematics duality. We work out the worldsheet details of these theories and show that they admit a formulation as integrals on the support of the scattering equations, or alternatively, as ambitwistor string theories. For gravity, this generalizes the work done by Berkovits and Witten on conformal gravity to D dimensions. The ambitwistor is also interpreted as a D-dimensional generalization of Witten's twistor string (SYM + conformal supergravity). As part of our ambitwistor investigation, we discover another (DF ) 2 gauge theory containing a photon that couples to Einstein gravity. This theory can provide an alternative KLT description of Einstein gravity compared to the usual Yang-Mills squared.

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Section: Conformal Gravity Amplitudesmentioning

confidence: 99%

Section: Jhep11(2017)052mentioning

confidence: 99%

Ambitwistor formulations of R2 gravity and (DF)2 gauge theories

Azevedo

Engelund

2017

J. High Energ. Phys.

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“…One might find various results of BPS amplitudes in [32][33][34][35][36][37][38][39][40]. Given the literatures, we just start to look after all the correlation functions.…”

Section: Jhep03(2017)019mentioning

confidence: 99%

Remarks on non-BPS string amplitudes and their all order α′ contact interactions in IIB, IIA

Hatefi¹

2017

J. High Energ. Phys.

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Abstract:We explore the entire form of S-Matrix elements of a potential C n−1 RamondRamond (RR) form field, a tachyon and two transverse scalar fields on both world volume and transverse directions of type IIB and IIA superstring theories. Apart fromWe then start to compare all singularity structures of symmetric and asymmetric analysis, generating all infinite singularity structures as well as all order α ′ contact interactions on the whole directions. This leads to deriving various new contact terms and several new restricted Bianchi identities in both type IIB and IIA. It is also shown that just some of the new couplings of type IIB (IIA) string theory can be re-verified in an Effective Field Theory (EFT) by pull-back of branes. To construct the rest of S-matrix elements one needs to first derive restricted world volume (or bulk) Bianchi identities and then discover new EFT couplings in both type IIB and IIA. Finally the presence of commutator of scalar fields inside the exponential of Wess-Zumino action for non-BPS branes has been confirmed as well.

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“…Now let us deal with this S-matrix in the other pictures of both closed-open strings to see what happens to the complete form of the S-matrix and also explore all its contact interactions. 22 The following vertices with their correct Chan-Paton factors of Dbrane-anti-D-brane are kept:…”

Section: The Five Point World-sheet S-matrix Of the Brane-anti-brane mentioning

confidence: 99%

“…Having set up this formalism, one may end up obtaining several new couplings for all BPS branes in the RNS formalism [18][19][20][21][22][23] and eventually one could investigate a proposal for the corrections to some of the couplings [24]. In particular it is shown that some of these couplings must be employed to be able to work with some of the applications of either M-theory [25,26] or gauge-gravity duality [27].…”

Section: Introductionmentioning

confidence: 99%

Remarks on the mixed Ramond–Ramond, open string scattering amplitudes of BPS, non-BPS and brane–anti-brane

Hatefi

2015

Eur. Phys. J. C

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From the world-sheet point of view we compute three, four and five point BPS and non-BPS scattering amplitudes of type IIA and IIB superstring theory. All these mixed S-matrix elements including a RamondRamond closed string (RR) in the bulk and a scalar/gauge or tachyons with all different pictures (including an RR in asymmetric and symmetric pictures) have been carried out. We have also shown that in asymmetric pictures various equations must be kept fixed. More importantly, by direct calculations on the upper half plane, it is realised that some of the equations (which must be true) for BPS branes cannot be necessarily applied to non-BPS amplitudes. We also derive the S-matrix elements of V −2T and clarify the fact that in the presence of the scalar field and an RR, the terms carrying momentum of an RR in the transverse directions play an important role in the entire form of the S-matrix and their presence is needed in order to have gauge invariance for the entire S-matrix elements of type IIA (IIB) superstring theory.

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RNS derivation of N-point disk amplitudes from the revisited S-matrix approach

Cited by 51 publications

References 48 publications

Ambitwistor formulations of R2 gravity and (DF)2 gauge theories

Ambitwistor formulations of R2 gravity and (DF)2 gauge theories

Remarks on non-BPS string amplitudes and their all order α′ contact interactions in IIB, IIA

Remarks on the mixed Ramond–Ramond, open string scattering amplitudes of BPS, non-BPS and brane–anti-brane

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