Results 21 to 30 of about 18,559 (167)
String scattering amplitudes and deformed cubic string field theory
Physics Letters B, 2018 We study string scattering amplitudes by using the deformed cubic string field theory which is equivalent to the string field theory in the proper-time gauge.
Sheng-Hong Lai +3 more
doaj +1 more source
Local string field theory [PDF]
XIVth International Congress on Mathematical Physics, 2006 We consider open bosonic strings. The non-interacting multi-string theory is described by certain free string field operators which we construct. These are shown to have local commutators with respect to a center of mass coordinate. The construction is carried out both in the light cone gauge and in a covariant formulation.
openaire +2 more sources
NONCOMMUTATIVE FIELD THEORIES AND (SUPER)STRING FIELD THEORIES [PDF]
Particles and Fields, 2002 In this lecture notes we explain and discuss some ideas concerning noncommutative geometry in general, as well as noncommutative field theories and string field theories. We consider noncommutative quantum field theories emphasizing an issue of their renormalizability and the UV/IR mixing. Sen's conjectures on open string tachyon condensation and their
Aref'eva, I. Ya. +4 more
openaire +2 more sources
Gravitational Scattering Amplitudes and Closed String Field Theory in the Proper-Time Gauge
EPJ Web of Conferences, 2018 We construct a covariant closed string field theory by extending recent works on the covariant open string field theory in the proper-time gauge. Rewriting the string scattering amplitudes generated by the closed string field theory in terms of the ...
Lee Taejin
doaj +1 more source
String webs from field theory [PDF]
Journal of High Energy Physics, 2001 The spectrum of stable electrically and magnetically charged supersymmetric particles can change discontinuously as one changes the vacuum on the Coulomb branch of gauge theories with extended supersymmetry in four dimensions. We show that this decay process can be understood and is well described by semiclassical field configurations purely in terms ...
Argyres, Philip C., Narayan, K.
openaire +2 more sources
String field theory as world-sheet UV regulator
Journal of High Energy Physics, 2019 Even at tree level, the first quantized string theory suffers from apparent short distance singularities associated with collision of vertex operators that prevent us from straightforward numerical computation of various quantities.
Ashoke Sen
doaj +1 more source
Nonrelativistic string theory and T-duality
Journal of High Energy Physics, 2018 Nonrelativistic string theory in flat spacetime is described by a two-dimensional quantum field theory with a nonrelativistic global symmetry acting on the worldsheet fields. Nonrelativistic string theory is unitary, ultraviolet complete and has a string
Eric Bergshoeff, Jaume Gomis, Ziqi Yan
doaj +1 more source
Asymptotic scalar field cosmology in string theory
Journal of High Energy Physics, 2022 Asymptotic (late-time) cosmology depends on the asymptotic (infinite-distance) limits of scalar field space in string theory. Such limits feature an exponentially decaying potential V ~ exp(−cϕ) with corresponding Hubble scale H ~ ϕ ̇ 2 + 2 V $$ \sqrt ...
Tom Rudelius
doaj +1 more source
String theory in electromagnetic fields [PDF]
Journal of High Energy Physics, 2003 A review of various aspects of superstrings in background electromagnetic fields is presented. Topics covered include the Born-Infeld action, spectrum of open strings in background gauge fields, the Schwinger mechanism, finite-temperature formalism and Hagedorn behaviour in external fields, Debye screening, D-brane scattering, thermodynamics of D ...
Ambjørn, Jan +3 more
openaire +2 more sources
Background independence of closed superstring field theory
Journal of High Energy Physics, 2018 Given a family of world-sheet superconformal field theories related by marginal deformation, we can formulate superstring field theory based on any of these world-sheet theories.
Ashoke Sen
doaj +1 more source