Results 21 to 30 of about 618 (129)
Microscopic unitary description of tidal excitations in high-energy string-brane collisions [PDF]
, 2013 The eikonal operator was originally introduced to describe the effect of tidal excitations on higher-genus elastic string amplitudes at high energy.
Veneziano G. +16 more
core +1 more source
Amplitudes involving massive states using pure spinor formalism
Journal of High Energy Physics, 2018 Same amplitudes evaluated independently using RNS and pure spinor formalism are expected to agree. While for massless states, this fact has been firmly established, for massive states such an explicit check has been lacking so far.
Subhroneel Chakrabarti +2 more
doaj +1 more source
Integrated massive vertex operator in pure spinor formalism
Journal of High Energy Physics, 2018 We construct the integrated vertex operator for the first massive states of open superstrings with (mass)2 = 1/α ′ in the pure spinor formalism of the superstring theory. This vertex operator is expressed in terms of the ten dimensional N = 1 $$ \mathcal{
Subhroneel Chakrabarti +2 more
doaj +1 more source
Supermoduli and PCOs at genus two
Journal of High Energy Physics, 2023 We illustrate the relation between supermoduli integration and picture changing operators (PCOs) particularly concerning the role of vertical integration, in the context of superstring vacuum amplitudes, by an explicit comparison of different ...
Charles Wang, Xi Yin
doaj +1 more source
Superstrings in Four Dimensions [PDF]
, 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
Theta expansion of first massive vertex operator in pure spinor
Journal of High Energy Physics, 2018 We provide the covariant superspace equations that are sufficient to determine the complete θ expansion of the vertex operator of the open string massive states with (mass)2 = 1/α′ in pure spinor formalism of superstring theory.
Subhroneel Chakrabarti +2 more
doaj +1 more source
Ambitwistor strings in six and five dimensions
Journal of High Energy Physics, 2021 Ambitwistor strings are chiral (holomorphic) strings whose target is the space of complex null geodesics, ambitwistor space. We introduce twistor representations of ambitwistor space in 6 and 5 dimensions.
Yvonne Geyer +2 more
doaj +1 more source
SO(10)-like Superstring Standard Model with R-parity from the Heterotic String
, 2007 Submitted for the SUSY07 proceedings, 4 pages ...
Kim, Jihn E., Kim, Ji-Hun, Kyae, Bumseok
openaire +2 more sources
A Note on the dS Swampland Conjecture, Non‐BPS Branes and K‐Theory
Fortschritte der Physik, Volume 67, Issue 11, November 2019., 2019 Abstract We point out that the de Sitter swampland conjecture would be falsified if classical fluxed Type IIA orientifold vacua with a single non‐BPS D7‐brane were indeed part of the string theory landscape. In other words, the dS swampland conjecture implies the cancellation of K‐theory charges on a compact space.
Ralph Blumenhagen +2 more
wiley +1 more source
Cosmic necklaces in string theory and field theory [PDF]
, 2010 PhDIn this thesis we investigate astrophysical phenomena which arise in models with compact extra dimensions, focussing on the cosmological consequences of strings which wrap cycles in the internal space. Embedding our strings in the Klebanov-Strassler
Lake, Matthew James
core +4 more sources