On modified tachyon DBI action

Garousi, Mohammad R.

doi:10.1016/j.nuclphysb.2009.02.021

Cited by 4 publications

(8 citation statements)

References 31 publications

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“…In both of these effective theories the trace prescriptions for the actions are somewhat ambiguous. In the case of D-D, the proposed action of [31] gives an alternative way of performing the trace and potentially gives different results from those found here. The non-Abelian DBI effective description of the D-D system should be valid not just at small angles.…”

Section: Summary and Discussioncontrasting

confidence: 57%

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Inhomogeneous tachyon dynamics and the zipper

Jokela

Lippert

2009

J. High Energy Phys.

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We study the process of inhomogeneous tachyon condensation in an intersecting D1-and anti-D1-brane system using an effective tachyon DBI action. By switching to the Hamiltonian formalism, we numerically solve for the dynamical evolution of the system at a small intersection angle. We find that the decay proceeds indefinitely and resembles the action of two zippers moving away from the intersection point at the speed of light, zipping the branes together and leaving inhomogeneous tachyon matter behind. We also discuss the range of validity of our analysis and discuss the relation of the D1-anti-D1 description of the system to one in terms of an intersecting D1-D1-brane pair. * najokela@physics.technion.ac.il †

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Section: Summary and Discussioncontrasting

confidence: 57%

“…Since we will be solving the Hamiltonian equations of motion, we need to translate our initial conditions forṪ andẏ into conditions for Π T and Π y . From (31) and (32) we find that Π T (t = 0, x) = 0 and Π y (t = 0, x) = 0.…”

Section: Boundary Conditionsmentioning

confidence: 95%

Inhomogeneous tachyon dynamics and the zipper

Jokela

Lippert

2009

J. High Energy Phys.

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“…and (31) shows the factor of π 2 [(c 4,0 + c 0,4 )(s ′4 + u ′4 ) + (c 1,3 + c 3,1 )(s ′3 u ′ + u ′3 s ′ ) + 2c 2,2 s ′2 u ′2 ] which is surprisingly equal to the above factor making use of the coefficients in (25). One might conclude that these comparisons can be easily extended 4 to all orders of α ′ .…”

Section: Infinite Number Of Tachyon Poles For P + 1 = N Casementioning

confidence: 99%

“…To study the effective action of non-BPS branes we would like to proceed with the second approach, which is the S-matrix formalism. In this method one must include kinetic term of the tachyon in the DBI part [24]; however, due to considering internal degrees of freedom or internal Chan-Paton factors belonging to non-BPS branes this action gets modified [23,25].…”

Section: Introductionmentioning

confidence: 99%

Higher derivative corrections to Wess-Zumino and tachyonic actions in type II super string theory

Hatefi

2012

Phys. Rev. D

166

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We evaluate in detail the string scattering amplitude to compute different interactions of two massless scalars, one tachyon and one closed string RamondRamond field in type II super string theory. In particular we find two scalar field and two tachyon couplings to all orders of α ′ up to on-shell ambiguity.We then obtain the momentum expansion of this amplitude and apply this infinite number of couplings to actually check that the infinite number of tachyon poles of S-matrix element of this amplitude for the p = n case (where p is the spatial dimension of a D p -brane and n is the rank of a Ramond-Ramond field strength ) to all orders of α ′ is precisely equal to the infinite number of tachyon poles of the field theory. In addition to confirming the couplings of closed string Ramond-Ramond field to the world-volume gauge field and scalar fields including commutators, we also propose an extension of the Wess-Zumino action which naturally reproduces these new couplings in field theory such that they could be confirmed with direct S-matrix computations. Finally we show that the infinite number of massless poles and contact terms of this amplitude for the p = n + 1 case can be reproduced by Chern-Simons, higher derivative corrections of the Wess-Zumino and symmetrized trace tachyon DBI actions.

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“…This action resembles a modified DBI action in flat background of N non-BPS D5-branes proposed in [15], namely…”

Section: Multiple D-branes In the Ns5-brane Backgroundmentioning

confidence: 71%

Non Abelian geometrical tachyon

Calò

Tallarita

Thomas

2010

J. High Energ. Phys.

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We investigate the dynamics of a pair of coincident D5 branes in the background of k NS5 branes. It has been proposed by Kutasov that the system with a single probing D-brane moving radially in this background is dual to the tachyonic DBI action for a non-BPS Dp brane. We extend this proposal to the non-abelian case and find that the duality still holds provided one promotes the radial direction to a matrix valued field associated with a non-abelian geometric tachyon and a particular parametrization for the transverse scalar fields is chosen. The equations of motion of a pair of coincident D5 branes moving in the NS5 background are determined. Analytic and numerical solutions for the pair are found in certain simplified cases in which the U (2) symmetry is broken to U (1) × U (1) corresponding to a small transverse separation of the pair. For certain range of parameters these solutions describe periodic motion of the centre of mass of the pair 'bouncing off' a finite sized throat whose minimum size is limited by the D5 branes separation.

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On modified tachyon DBI action

Cited by 4 publications

References 31 publications

Inhomogeneous tachyon dynamics and the zipper

Inhomogeneous tachyon dynamics and the zipper

Higher derivative corrections to Wess-Zumino and tachyonic actions in type II super string theory

Non Abelian geometrical tachyon

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