Results 61 to 70 of about 2,664,445 (176)

A new approach to superstring [PDF]

arXiv, 2023
We show how starting with one-string space of states in BRST formalism one can construct a large class of physical quantities containing, in particular, scattering amplitudes for bosonic string and superstring. The same techniques work for heterotic string.
arxiv  

Calabi‐Yau Manifolds, Hermitian Yang‐Mills Instantons, and Mirror Symmetry

Advances in High Energy Physics, Volume 2017, Issue 1, 2017., 2017
We address the issue of why Calabi‐Yau manifolds exist with a mirror pair. We observe that the irreducible spinor representation of the Lorentz group Spin(6) requires us to consider the vector spaces of two forms and four forms on an equal footing. The doubling of the two‐form vector space due to the Hodge duality doubles the variety of six‐dimensional
Hyun Seok Yang, Sangheon Yun, Anna Cimmino   +2 more
wiley   +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, Lionel Mason, David Skinner   +2 more
doaj   +1 more source

Toy superstrings.

Physical Review D, Particles and fields, 1989
Superstrings with critical dimension two and two real bosonic spacetime coordinates may serve as useful toy models for the study of string properties.
Marco Corvi, V. Alan Kostelecký, P. Moxhay   +2 more
semanticscholar   +1 more source

Complex Structure of the Four‐Dimensional Kerr Geometry: Stringy System, Kerr Theorem, and Calabi‐Yau Twofold

Advances in High Energy Physics, Volume 2013, Issue 1, 2013., 2013
The 4D Kerr geometry displays many wonderful relations with quantum world and, in particular, with superstring theory. The lightlike structure of fields near the Kerr singular ring is similar to the structure of Sen solution for a closed heterotic string.
Alexander Burinskii, P. Bussey
wiley   +1 more source

On the existence of heterotic-string and type-II-superstring field theory vertices

Journal of Geometry and Physics
We consider two problems associated to the space of Riemann surfaces that are closely related to string theory. We first consider the problem of existence of heterotic-string and type-II-superstring field theory vertices in the product of spaces of bordered surfaces parameterizing left- and right-moving sectors of these theories. It turns out that this
Seyed Faroogh Moosavian, Yehao Zhou
openaire   +2 more sources

Evidence for Heterotic - Type I String Duality [PDF]

Nucl.Phys.B460:525-540,1996, 1995
A study is made of the implications of heterotic string $T$-duality and extended gauge symmetry for the conjectured equivalence of heterotic and Type I superstrings. While at first sight heterotic string world-sheet dynamics appears to conflict with Type I perturbation theory, a closer look shows that Type I perturbation theory ``miraculously'' breaks ...
arxiv   +1 more source

Boundary Conditions and Heterotic Construction in Topological Membrane Theory [PDF]

Phys.Lett. B383 (1996) 271-280, 1996
Using the topological membrane approach to string theory, we suggest a geometric origin for the heterotic string. We show how different membrane boundary conditions lead to different string theories. We discuss the construction of closed oriented strings and superstrings, and demonstrate how the heterotic construction naturally arises from a specific ...
arxiv   +1 more source

Notes on Characterizations of 2d Rational SCFTs: Algebraicity, Mirror Symmetry, and Complex Multiplication

Fortschritte der Physik, Volume 73, Issue 1-2, February 2025.
Abstract S. Gukov and C. Vafa proposed a characterization of rational N=(1,1)$N=(1,1)$ superconformal field theories (SCFTs) in 1+1$1+1$ dimensions with Ricci‐flat Kähler target spaces in terms of the Hodge structure of the target space, extending an earlier observation by G. Moore.
Abhiram Kidambi, Masaki Okada, Taizan Watari   +2 more
wiley   +1 more source

On ℛ4 Terms and MHV Amplitudes in 𝒩 = 5,6 Supergravity Vacua of Type II Superstrings

Advances in High Energy Physics, Volume 2011, Issue 1, 2011., 2011
We compute one‐loop threshold corrections to ℛ4 terms in 𝒩 = 5,6 supergravity vacua of Type II superstrings. We then discuss nonperturbative corrections generated by asymmetric D‐brane instantons. Finally we derive generating functions for MHV amplitudes at tree level in 𝒩 = 5,6 supergravities.
Massimo Bianchi, Yang-Hui He
wiley   +1 more source