نتایج جستجو برای: supergravity

تعداد نتایج: 6797  

2015
Olaf Hohm Arnaud Baguet Henning Samtleben

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We use exceptional field theory as a tool to work out the full nonlinear reduction ansatz for the AdS 5 × S 5 compa...

Journal: :Physical review. D, Particles and fields 1995
Kim Park

We explore the one-loop electroweak radiative corrections in the context of the traditional minimal SU(5) and the string-inspired SU(5) × U(1) supergravity models by calculating explicitly vacuum-polarization and vertexcorrection contributions to the ǫ1 and ǫb parameters. We also include in this analysis the constraint from b → sγ whose inclusive branching ratio B(b → sγ) has been actually meas...

1998

We construct supergravity theories in twelve and thirteen dimensions with the respective signatures (10, 2) and (11, 2) with some technical details. Starting with N = 1 supergravity in 10+2 dimensions coupled to Green-Schwarz superstring, we give N = 2 chiral supergravity in 10+2 dimensions with its couplings to super (2 + 2)-brane. We also build an N = 1 supergravity in 11+2 dimensions, couple...

2001
Mariana Graña

We consider configurations of D7-branes and whole and fractional D3-branes with N = 2 supersymmetry. On the supergravity side these have a warp factor, three-form flux and a nonconstant dilaton. We discuss general IIB solutions of this type and then obtain the specific solutions for the D7/D3 system. On the gauge side the D7-branes add matter in the fundamental representation of the D3-brane ga...

2007
Filipe Moura

We start by a concise yet thorough revision of four-dimensional super-space supergravity. We present curved superspace geometry, for arbitrary N , including torsion, curvature and Bianchi identities. We motivate the choice of torsion constraints. We then consider the particular cases of N = 1, 2. In both cases we show how Poincaré supergravity can be obtained from conformal supergravity. We see...

1994
M. J. Duff G. W. Gibbons P. K. Townsend

It is known that, in string sigma-model metric, the 'extreme' fivebrane solution of D=10 supergravity interpolates between D=10 Minkowski spacetime and a supersym-metric S 3 compactification to a linear dilaton vacuum. We show here that, in fivebrane sigma-model metric, the extreme string solution of D=10 supergravity interpolates between Minkowski spacetime and a hitherto unknown supersymmetri...

2006
W. F. Chen

In a classical conformal invariant supersymmetric gauge theory, the chiral R-symmetry current jμ, the supersymmetry current sμ and the energymomentum tensor θμν constitute a supercurrent multiplet. There are two different superconformal anoamly multiplets in four-dimensional supersymmetric gauge theories, one originating from the supersymmetric gauge dynamics and the consequent nonvanishing β-f...

2008
Michael B. Green John H. Schwarz

We consider the conditions necessary for obtaining perturbative maximal supergravity in d dimensions as a decoupling limit of type II superstring theory compactified on a (10 − d)-torus. For dimensions d = 2 and d = 3 it is possible to define a limit in which the only finite-mass states are the 256 massless states of maximal supergravity. However, in dimensions d ≥ 4 there are infinite towers o...

2003
Henning Samtleben

We construct a Chern-Simons type gauged N = 8 supergravity in three spacetime dimensions with gauge group SO(4) × T∞ over the infinite dimensional coset space SO(8,∞)/ (SO(8)× SO(∞)), where T∞ is an infinite dimensional translation subgroup of SO(8,∞). This theory describes the effective interactions of the (infinitely many) supermultiplets contained in the two spin-1 Kaluza-Klein towers arisin...

2008
Evgeny I. Buchbinder Jaume Gomis Filippo Passerini

We construct a new class of supersymmetric surface operators in N = 4 SYM and find the corresponding dual supergravity solutions. We show that the insertion of the surface operator – which is given by a WZW model supported on the surface – appears by integrating out the localized degrees of freedom along the surface which arise microscopically from a D3/D7 brane intersection. Consistency requir...

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