Results 11 to 20 of about 570 (144)

Homotopy Transfer and Effective Field Theory II: Strings and Double Field Theory

Fortschritte der Physik, Volume 70, Issue 2-3, March 2022., 2022
Abstract We continue our study of effective field theory via homotopy transfer of L∞$L_\infty$‐algebras, and apply it to tree‐level non‐Wilsonian effective actions of the kind discussed by Sen in which the modes integrated out are comparable in mass to the modes that are kept. We focus on the construction of effective actions for string states at fixed
Alex S. Arvanitakis, Olaf Hohm, Chris Hull, Victor Lekeu   +3 more
wiley   +1 more source

The anomaly that was not meant IIB

Fortschritte der Physik, Volume 70, Issue 1, January 2022., 2022
Abstract Type IIB supergravity enjoys a discrete non‐Abelian duality group, which has potential quantum anomalies. In this paper we explicitly compute these, and present the bordism group that controls them, modulo some physically motivated assumptions.
Arun Debray, Markus Dierigl, Jonathan J. Heckman, Miguel Montero   +3 more
wiley   +1 more source

Toroidal & Orbifold Compactifications at Large D and D‐Duality

Fortschritte der Physik, Volume 70, Issue 1, January 2022., 2022
Abstract In this paper I will further investigate the spectrum of quantum gravity or string theories at large number of dimensions. We will see that volumes of certain orbifolds shrink at large D. It follows that the mass spectra of the leading Kaluza‐Klein towers and also of wrapped brane states on these orbifolds possess a non‐trivial dependence on D:
Dieter Lüst
wiley   +1 more source

String (Gravi)photons, “Dark Brane Photons”, Holography and the Hypercharge Portal

Fortschritte der Physik, Volume 69, Issue 6, June 2021., 2021
Abstract The mixing of graviphotons and dark brane photons to the Standard Model hypercharge is analyzed in full generality, in weakly‐coupled string theory. Both the direct mixing as well as effective terms that provide mixing after inclusion of SM corrections are estimated to lowest order.
P. Anastasopoulos, M. Bianchi, D. Consoli, E. Kiritsis   +3 more
wiley   +1 more source

Superstring Backgrounds in String Geometry

Advances in High Energy Physics, Volume 2021, Issue 1, 2021., 2021
String geometry theory is a candidate of the nonperturbative formulation of string theory. In order to determine the string vacuum, we need to clarify how superstring backgrounds are described in string geometry theory. In this paper, we show that all the type IIA, IIB, SO(32) type I, and SO(32) and E8 × E8 heterotic superstring backgrounds are ...
Masaki Honda, Matsuo Sato, Taiki Tohshima, Muhammad Farasat Shamir   +3 more
wiley   +1 more source

Type II duality symmetries in six dimensions [PDF]

, 1996
We discuss the different discrete duality symmetries in six dimensions that act within and between (i) the 10-dimensional heterotic string compactified on T^4, (ii) the 10-dimensional type IIA string compactified on K3 and (iii) the 10-dimensional type ...
Bergshoeff, E.,, Bergshoeff, E., Janssen, Bert, Janssen, Bert,, Behrndt, Klaus,, Behrndt, Klaus   +5 more
core   +1 more source

Two-point string amplitudes

Journal of High Energy Physics, 2019
We show that the two-point tree level amplitude in string theory in flat space is given by the standard free particle expression.
Harold Erbin, Juan Maldacena, Dimitri Skliros   +2 more
doaj   +1 more source

Noncommutativity and nonassociativity of type II superstring with coordinate dependent RR field — the general case

Journal of High Energy Physics, 2022
In this paper we consider non-commutativity that arises from T-duality of bosonic coordinates of type II superstring in presence of coordinate dependent Ramond-Ramond field. Action with such choice of the background fields is not translational invariant.
D. Obrić, B. Nikolić
doaj   +1 more source

Dilaton incoming vertices of the closed superstring and the heterotic string

Physics Letters B, 1990
Abstract BRST- and conformally-invariant incoming vertices for the dilaton are constructed in the closed superstring and the heterotic string theories. The BRST-invariant (0, 0) conformal field corresponding to the dilaton is determined up to a BRST cohomology transformation.
H. Kataoka, Hikaru Sato
openaire   +1 more source

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., Di Vecchia, Paolo, Di Vecchia P, Paolo Di Vecchia, Di Vecchia, Paolo,, Gabriele Veneziano, D'Appollonio, G, D'Appollonio, Giuseppe, Russo, R, Russo R, Giuseppe D’Appollonio, Di Vecchia, P, Veneziano, Gabriele, Giuseppe, D'Appollonio, Rodolfo Russo, Russo, Rodolfo, Veneziano, G   +16 more
core   +1 more source