Results 71 to 80 of about 570 (144)

Topics in Supersymmetry Breaking and Gauge/Gravity Dualities [PDF]

, 2010
The thesis covers two topics in string theory and quantum field theory. First, we realize metastable vacua in various supersymmetric gauge theories. Specifically, we consider the Coulomb branch of any N = 2 supersymmetric gauge theory, and perturb it by ...
Park, Chang-Soon
core   +1 more source

Modular graph functions and odd cuspidal functions. Fourier and Poincaré series

Journal of High Energy Physics, 2019
Modular graph functions are SL(2, ℤ)-invariant functions associated with Feynman graphs of a two-dimensional conformal field theory on a torus of modulus τ. For one-loop graphs they reduce to real analytic Eisenstein series. We obtain the Fourier series,
Eric D’Hoker, Justin Kaidi
doaj   +1 more source

On unitarity of tree-level string amplitudes

Journal of High Energy Physics, 2022
Four-particle tree-level scattering amplitudes in string theory are magically consistent with unitarity, reflected in the non-trivial fact that beneath the critical dimension, the residues of the amplitudes on massive poles can be expanded in partial ...
Nima Arkani-Hamed, Lorenz Eberhardt, Yu-tin Huang, Sebastian Mizera   +3 more
doaj   +1 more source

One loop phenomenology of type II string theory: intersecting d-branes and noncommutativity [PDF]

, 2007
We examine one loop amplitudes for open and closed strings in certain D-brane configurations, and investigate the consequences for phenomenology. Initially we consider open strings at D6-brane intersections.
Goodsell, Mark Dayvon, Mark Dayvon Goodsell   +1 more
core  

One-loop monodromy relations on single cuts

Journal of High Energy Physics, 2017
The discovery of colour-kinematic duality has led to significant progress in the computation of scattering amplitudes in quantum field theories. At tree level, the origin of the duality can be traced back to the monodromies of open-string amplitudes ...
Alexander Ochirov, Piotr Tourkine, Pierre Vanhove   +2 more
doaj   +1 more source

Geometry of black holes and braneworlds in higher dimensions [PDF]

, 2004
This tliesis first discusses braneworld models, we explain how the bulk geometry in codimension 2 scenarios restricts braneworld fields in a way inconsistent with observation.
Paul B. Bostock, Bostock, Paul B, Bostock, Paul B.   +2 more
core  

Fundamental Superstrings as Holograms

, 2007
46 pages, JHEP style. v2: Comments, references addedThe worldsheet of a macroscopic fundamental superstring in the Green-Schwarz light-cone gauge is viewed as a possible boundary hologram of the near horizon region of a small black string. For toroidally
Murthy, Sameer, Dabholkar, Atish
core   +1 more source

Superstring amplitudes from BCJ numerators at one loop

Journal of High Energy Physics
We find a direct map that determines moduli-space integrands for one-loop superstring amplitudes in terms of field-theory loop integrands in the BCJ form. The latter can be computed using efficient unitarity methods, so our map provides an alternative to
Yvonne Geyer, Jiachen Guo, Ricardo Monteiro, Lecheng Ren   +3 more
doaj   +1 more source

braneworld cosmology and holography [PDF]

, 2002
This thesis is devoted to studying two important aspects of braneworld physics: their cosmology and their holography. We examine the Einstein equations induced on a general (n - 2)-brane of arbitrary tension, embedded in some n-dimensional bulk.
Padilla, Antonio
core  

Superstrings in Four Dimensions

, 1988
All of the work presented in this thesis evolved from the initial idea that strings, if they are to make sense, ought to exist in four spacetime dimensions.
Bluhm, Robert Theodore, Jr.
core   +1 more source