Results 71 to 80 of about 572 (144)

Towards massive field-theory amplitudes from the cohomology of pure spinor superspace

Journal of High Energy Physics
By analogy with the formula for the massless string disk amplitudes, we define massive field-theory tree amplitudes and conjecture that the BRST cohomology structure of pure spinor superspace fixes their form. We give evidence by deriving the pure spinor
Carlos R. Mafra
doaj   +1 more source

On the equivalence between SRS and PCO formulations of superstring perturbation theory

Journal of High Energy Physics, 2023
We establish the equivalence between two formulations of superstring perturbation theory, one based on integration over the supermoduli space of super Riemann surfaces (SRS), the other based on integration over the bosonic moduli space with insertions of
Charles Wang, Xi Yin
doaj   +1 more source

Fermionic T-duality and U-duality in type II supergravity [PDF]

, 2011
PhDThis thesis deals with the two duality symmetries of N = 2 D = 10 supergravity theories that are descendant from the full superstring theory: fermionic T-duality and U-duality.
Bakhmatov, Ilya
core  

Massless representation of massive superfields and tree amplitudes with the pure spinor formalism

Journal of High Energy Physics
We construct the unintegrated vertex operator at the first mass level of the open superstring from the OPE of massless vertices. Using BRST cohomology manipulations, the tree amplitude of two massless and one massive state is rewritten in terms of the ...
Sitender Pratap Kashyap, Carlos R. Mafra, Mritunjay Verma, Luis Ypanaqué   +3 more
doaj   +1 more source

Massive theta lifts

Journal of High Energy Physics, 2023
We use Poincaré series for massive Maass-Jacobi forms to define a “massive theta lift”, and apply it to the examples of the constant function and the modular invariant j-function, with the Siegel-Narain theta function as integration kernel.
Marcus Berg, Daniel Persson
doaj   +1 more source

Computational Algebraic Geometry in String and Gauge Theory

, 2012
Advances in High Energy Physics, Volume 2012, Issue 1, 2012.
Yang-Hui He, Philip Candelas, Amihay Hanany, Andre Lukas, Burt Ovrut   +4 more
wiley   +1 more source

Quantization of heterotic strings in a Goedel/Anti de Sitter spacetime and chronology protection [PDF]

, 2004
23 pages; v2: minor changes, references added, version to appear in JHEPWe show that a Goedel-like deformation of AdS3 in heterotic string theory can be realized as an exact string background.
Israël, Dan
core  

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

Eigenvalue equation for the modular graph C a,b,c,d

Journal of High Energy Physics, 2019
The modular graph C a,b,c,d on the torus is a three loop planar graph in which two of the vertices have coordination number four, while the others have coordination number two. We obtain an eigenvalue equation satisfied by C a,b,c,d for generic values of
Anirban Basu
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