Results 91 to 100 of about 5,118 (111)

Spin-Statistics Violations in Superstring Theory

, 2008
I describe how superstring theory may violate spin-statistics in an experimentally observable manner. Reviewing the basics of superstring interactions and how to utilize these to produce a statistical phase, I then apply these ideas to two specific ...
A. Y. Ignatiev, M. B. Green, Mark G. Jackson   +2 more
core   +1 more source

2-Group Symmetries of 6D Little String Theories and T-Duality. [PDF]

Ann Henri Poincare, 2021
Del Zotto M, Ohmori K.
europepmc   +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

The cohomology of superspace, pure spinors and invariant integrals

, 2008
The superform construction of supersymmetric invariants, which consists of integrating the top component of a closed superform over spacetime, is reviewed.
A. Galperin, A.P. Isaev, A.P. Isaev, B.E.W. Nilsson, J.M. Drummond, J.M. Drummond, K. Lechner, M. Cederwall, M. Cederwall, M. Cederwall, M. Cederwall, M. Cederwall, N Berkovits, N. Berkovits, N. Berkovits, N. Berkovits, N. Berkovits, N. Berkovits, N. Berkovits, P. Fré, P. Fré, P.A. Grassi, P.S Howe, P.S. Howe, P.S. Howe, P.S. Howe, P.S. Howe, R. D'Auria, S.J. Gates Jr., S.J. Gates Jr., T. Biswas   +30 more
core   +1 more source

Upper bound on the Atiyah-Singer index from tadpole cancellation

Journal of High Energy Physics
We propose an upper bound on the Atiyah-Singer index in the effective action of string theory. For E 8 × E 8 ′ $$ {E}_8^{\prime } $$ and SO(32) heterotic string theories on smooth Calabi-Yau threefolds with line bundles, we find that the tadpole ...
Keiya Ishiguro, Takafumi Kai, Satsuki Nishimura, Hajime Otsuka, Maki Takeuchi   +4 more
doaj   +1 more source

Compactification of D=11 supergravity on spaces of exceptional holonomy

, 1995
We investigate the compactification of D=11 supergravity to D=5,4,3, on compact manifolds of holonomy $SU(3)$ (Calabi-Yau), $G_2$, and $Spin(7)$, respectively, making use of examples of the latter two cases found recently by Joyce. In each case the lower
Awada, Bagger, Bergshoeff, Bergshoeff, Bonan, Candelas, Candelas, Cremmer, Duff, Duff, Duff, Duff, Ferrara, G. Papadopoulos, Gates, Gibbons, Ginsparg, Green, Green, Green, Grisaru, Grisaru, Günaydin, Günaydin, Günaydin, Günaydin, Günaydin, Güven, Harvey, Howe, Howe, Howe, Howe, Howe, Hull, Kachru, Klemm, Narain, Narain, P.K. Townsend, Sen, Shatashvili, Sierra, Strominger, Townsend, Townsend, Vafa, Witten, Witten   +48 more
core   +2 more sources

Heterotic and bosonic string amplitudes via field theory

Journal of High Energy Physics, 2018
Previous work has shown that massless tree amplitudes of the type I and IIA/B superstrings can be dramatically simplified by expressing them as double copies between field-theory amplitudes and scalar disk/sphere integrals, the latter containing all the ...
Thales Azevedo, Marco Chiodaroli, Henrik Johansson, Oliver Schlotterer   +3 more
doaj   +1 more source

Recent Developments in String Theory [PDF]

, 1997
After briefly reviewing basic concepts of perturbative string theory, we explain in simple terms some of the new findings that created excitement among the string physicists.
Lerche, W.
core   +1 more source

T-duality invariant effective actions at orders α′, α′2

Journal of High Energy Physics, 2018
We use compatibility of the D-dimensional effective actions for diagonal metric and for dilaton with the T-duality when theory is compactified on a circle, to find the D-dimensional couplings of curvatures and dilaton as well as the higher derivative ...
Hamid Razaghian, Mohammad R. Garousi
doaj   +1 more source

M-Phenomenology [PDF]

, 1997
Recent developments involving strongly coupled superstrings are discussed from a phenomenological point of view. In particular, strongly coupled $E_8\times E'_8$ is described as an appropriate long-wavelength limit of M-theory, and some generic ...
Nanopoulos, D. V.
core   +2 more sources