Results 51 to 60 of about 462 (74)

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

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

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

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

Fermionic one-loop amplitudes of the RNS superstring

Journal of High Energy Physics, 2018
We investigate massless n-point one-loop amplitudes of the open RNS superstring with two external fermions and determine their worldsheet integrands.
Seungjin Lee, Oliver Schlotterer
doaj   +1 more source

Connecting the ambitwistor and the sectorized heterotic strings

Journal of High Energy Physics, 2017
The sectorized description of the (chiral) heterotic string using pure spinors has been misleadingly viewed as an infinite tension string. One evidence for this fact comes from the tree level 3-point graviton amplitude, which we show to contain the usual
Thales Azevedo, Renann Lipinski Jusinskas   +1 more
doaj   +1 more source

Pair production and gravity as the weakest force

Journal of High Energy Physics, 2020
The Weak Gravity Conjecture (WGC) is usually formulated in terms of the stability of extremal black-holes or in terms of long distance Coulomb/Newton potentials.
Eduardo Gonzalo, Luis E. Ibáñez
doaj   +1 more source

State counting on fibered CY 3-folds and the non-Abelian weak gravity conjecture

Journal of High Energy Physics, 2021
We extend the dictionary between the BPS spectrum of Heterotic strings and the one of F-/M-theory compactifications on K3 fibered Calabi-Yau 3-folds to cases with higher rank non-Abelian gauge groups and in particular to dual pairs between Heterotic CHL ...
Cesar Fierro Cota, Albrecht Klemm, Thorsten Schimannek   +2 more
doaj   +1 more source

Subleading soft theorem for multiple soft gravitons

Journal of High Energy Physics, 2017
We derive the subleading soft graviton theorem in a generic quantum theory of gravity for arbitrary number of soft external gravitons and arbitrary number of finite energy external states carrying arbitrary mass and spin.
Subhroneel Chakrabarti, Sitender Pratap Kashyap, Biswajit Sahoo, Ashoke Sen, Mritunjay Verma   +4 more
doaj   +1 more source

Introduction to the special issue dedicated to Michael J. Duff FRS on the occasion of his 70th birthday. [PDF]

Proc Math Phys Eng Sci, 2022
Borsten L, Marrani A, Pope CN, Stelle K.
europepmc   +1 more source