Non Abelian geometrical tachyon

Calò, Vincenzo; Tallarita, Gianni; Thomas, Steven

doi:10.1007/jhep11(2010)063

Cited by 6 publications

(6 citation statements)

References 26 publications

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“…In [34], the dynamics of this system was analyzed using EFT methods, taking into account string loop divergences. As applications of tachyonic EFTs, we would like to highlight brane production [35][36][37][38][39][40][41][42][43] and inflation in string theory, which later on became important ingredients the context of KKLT [44][45][46]. Various thermodynamic aspects of this system at finite temperature have been studied, whereby the system gets stabilised and can be related to black holes, leading to applications in AdS/CFT correspondence in string and M-theory [47,48].…”

Section: Introductionmentioning

confidence: 99%

All-order quartic couplings in highly symmetric D-brane-anti-D-brane systems

Hatefi

Sundell

2021

J. High Energ. Phys.

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We compute six-point string amplitudes for the scattering of one closed string Ramond-Ramond state, two tachyons and two gauge fields in the worldvolume of D-brane-anti-D-brane systems in the Type II superstring theories. From the resulting S-matrix elements, we read off the precise form of the couplings, including their exact numerical coefficients, of two tachyons and two gauge fields in the corresponding highly symmetric effective field eheory (EFT) Lagrangian in the worldvolume of D-brane-Anti-D-brane to all orders in α′, which modify and complete previous proposals. We verify that the EFT reproduces the infinite collection of stringy gauge field singularities in dual channels. Inspired by interesting similarities between the all-order highly symmetric EFTs and holographic duals of Vasiliev’s higher spin gravities à là Nilsson and Vasiliev, we make a proposal for tensionless limits of D-brane-anti-D-brane systems.

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Section: Introductionmentioning

confidence: 99%

All-order quartic couplings in highly symmetric D-brane-anti-D-brane systems

Hatefi

Sundell

2021

J. High Energ. Phys.

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“…Brane production [25][26][27][28][29][30][31][32][33][34][35], dealing with stable nonBPS D-branes in all type I,II string theory as well as having inflation in string theory in the language of brane anti brane or KKLT are suggested [36][37][38].…”

Section: Jcap04(2016)055mentioning

confidence: 99%

On D-brane -anti D-brane effective actions and their all order bulk singularity structures

Hatefi

2016

J. Cosmol. Astropart. Phys.

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All four point functions of brane anti brane system including their correct all order α ′ corrections have been addressed. All five point functions of one closed string Ramond-Ramond (RR), two real tachyons and either one gauge field or the scalar field in both symmetric and asymmetric pictures have also been explored. The entire analysis of < C −2 A 0 T 0 T 0 > is carried out. Not only does it fix the vertex operator of RR in asymmetric picture and in higher point functions of string theory amplitudes but also it confirms the fact that there is no issue of picture dependence of the mixed closed RR, gauge fields, tachyons and fermion fields in all symmetric or anti symmetric ones. We compute < C −2 φ 0 T 0 T 0 > S-matrix in the presence of a transverse scalar field, two real tachyons and that reveals two different kinds of bulk singularity structures, involving an infinite number of u-channel gauge field and (u + s ′ + t ′ ) -channel scalar bulk poles. In order to produce all those bulk singularity structures, we define various couplings at the level of the effective field theory that involve the mixing term of Chern-Simons coupling (with C-potential field) and a covariant derivative of the scalar field that comes from the pull-back of brane. Eventually we explore their all order α ′ corrections in the presence of brane anti brane system where various remarks will be also pointed out.By studying the unstable branes in detail , one may hope to have some sort of understanding about supersymmetry breaking as well as getting more knowledge about at least some of the string theory 's properties in the backgrounds which are specially time dependent [1,2,3].Having dealt with unstable branes , one could also talk about Sakai-Sugimoto model [4], the low energy hadron physics in some of the holographic QCD models as well as studying properly the so called spontaneous symmetry breaking in some of the holographic QCD models [5]. Indeed we try to define flavour branes by embedding various parallel branes and consider all anti branes inside a background which must be dual to some theory such as colour confined theorem. In fact one might consider brane anti brane like system as a probe if and only if N f << N c . Strictly speaking, one reveals the fact that the presence of tachyons in the spectrum is the only source of instability in all these formalisms, therefore it absolutely makes sense to actually work out within details with some field theories that do include these unstable modes.It was A.Sen who realized an effective actions [6,7,8] that involves tachyons, can describe various issues such as the decays [9] of the odd parity branes or the so called non-BPS branes in superstring theory. It is also shown in [3] that the Effective Field Theory (EFT) for all non-BPS branes includes just massless states as well as tachyons as we have dealt with non-BPS effective actions in [10] where various remarks on tachyon condensation for brane anti brane system have also been presented in [11].Sen has also clarified for brane anti brane...

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“…In this case, the r equation is different from (42) and, consequently, the two constants k, ℓ defined by (20) are not directly related. In fact, the r equation can be easily obtained from the line element in (19) which leads to…”

Section: General Motionmentioning

confidence: 99%

“…We point out here that there has already been an extensive study of the motion of probe branes in the transverse space of stacks of static branes of various kinds (see for example [13], [14], [15], [16], [17], [18], [19]) which have also been used in cosmological applications [20], [21], [22], [23], [24]. Also, in mirage cosmology [25], [26], the motion of a D-brane is considered in a gravitational background.…”

Section: Introductionmentioning

confidence: 99%

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MOTION OF A TEST PARTICLE IN THE TRANSVERSE SPACE OF Dp-BRANES

Bhattacharjee

Das

Greenwood

et al. 2012

Int. J. Mod. Phys. D

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We investigate the motion of a test particle in higher dimensions due to the presence of extended sources like Dp-branes by studying the motion in the transverse space of the brane. This is contrasted with the motion of a point particle in the Schwarzschild background in higher dimensions. Since Dp-branes are specific to 10-dimensional space time and exact solutions of geodesic equations for this particular space time has not been possible so far for the Schwarzschild background, we focus here to find the leading order solution of the geodesic equation (for motion of light rays). This enables us to compute the bending of light in both the backgrounds. We show that contrary to the well known result of no noncircular bound orbits for a massive particle, in Schwarzschild background, for d ≥ 5, the Dp-brane background does allow bound elliptic motion only for p = 6 and the perihelion of the ellipse regresses instead of advancement. We also find that circular orbits for photon are allowed only for p ≤ 3.

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Non Abelian geometrical tachyon

Cited by 6 publications

References 26 publications

All-order quartic couplings in highly symmetric D-brane-anti-D-brane systems

All-order quartic couplings in highly symmetric D-brane-anti-D-brane systems

On D-brane -anti D-brane effective actions and their all order bulk singularity structures

MOTION OF A TEST PARTICLE IN THE TRANSVERSE SPACE OF Dp-BRANES

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