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Scattering Amplitudes in Gauge Theory and Gravity

Providing a comprehensive, pedagogical introduction to scattering amplitudes in gauge theory and gravity, this book is ideal for graduate students and researchers. It offers a smooth transition from…
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Black Saturn

Using the inverse scattering method we construct an exact stationary asymptotically flat 4+1-dimensional vacuum solution describing “black saturn”: a spherical black hole surrounded by a black ring.…
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A supersymmetric black ring.

This is the first example of a supersymmetric, asymptotically flat black hole of nonspherical topology that has an event horizon of topology S1 x S2 and is uniquely specified by its electric charge and two independent angular momenta.
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Supersymmetric black rings and three-charge supertubes

We present supergravity solutions for $1/8$-supersymmetric black supertubes with three charges and three dipoles. Their reduction to five dimensions yields supersymmetric black rings with regular…
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Non-supersymmetric black rings as thermally excited supertubes

We construct a seven-parameter family of supergravity solutions that describe non-supersymmetric black rings and black tubes with three charges, three dipoles and two angular momenta. The black rings…
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Soft Photon and Graviton Theorems in Effective Field Theory.

It is proved that effective operators can result in new terms in the soft theorems at sub leading order for photons and subsubleading order for gravitons, and it is shown that no local operators can modify the subleading soft graviton theorem.
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Black Rings, Supertubes, and a Stringy Resolution of Black Hole Non-Uniqueness

In order to address the issues raised by the recent discovery of non-uniqueness of black holes in five dimensions, we construct a solution of string theory at low energies describing a…
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On renormalization group flows and the a-theorem in 6d

A bstractWe study the extension of the approach to the a-theorem of Komargodski and Schwimmer to quantum field theories in d = 6 spacetime dimensions. The dilaton effective action is obtained up to…
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E7(7) constraints on counterterms in N=8 supergravity

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Generating tree amplitudes in Script N = 4 SYM and Script N = 8 SG

We study n-point tree amplitudes of = 4 super Yang-Mills theory and = 8 supergravity for general configurations of external particles of the two theories. We construct generating functions for…
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