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We study the BPS spectrum of Little String Theory for bound states of M5-branes wrapped on six manifold of product topology $M_4\times\Sigma_2$ and the apparence of multi-loop $\theta$-functions in a supersymmetric index calculation. We…

High Energy Physics - Theory · Physics 2010-02-03 G. Bonelli

We explicitly write down the invariant supersymmetry conditions for branes with generic values of moduli and U-duality charges in various space-time dimensions $D \leq 10$. We then use these results to obtain new BPS states, corresponding…

High Energy Physics - Theory · Physics 2014-11-18 Alok Kumar , Subir Mukhopadhyay

A geometrical form of the supersymmetry conditions for D-branes on arbitrary type II supersymmetric backgrounds is derived, as well as the associated BPS bounds. The treatment is general and allows to consider, for instance, non-static…

High Energy Physics - Theory · Physics 2015-05-30 Luca Martucci

"Brane Supersymmetry Breaking" is a peculiar string-scale mechanism that can unpair Bose and Fermi excitations in orientifold models. It results from the simultaneous presence, in the vacuum, of collections of D-branes and orientifolds that…

High Energy Physics - Theory · Physics 2014-12-02 N. Kitazawa , A. Sagnotti

We introduce a new type IIB 5-brane description for the E-string theory which is the world-volume theory on the M5-brane probing the end of the world M9-brane. The E-string in the new realization is depicted as spiral 5-branes web equipped…

High Energy Physics - Theory · Physics 2015-08-04 Sung-Soo Kim , Masato Taki , Futoshi Yagi

We study non-BPS D-branes in the type II string vacua with chiral space-time SUSY constructed based on the asymmetric orbifolds of $\mbox{K3} \cong T^4/{\Bbb Z}_2$ as a succeeding work of arXiv:1704.05262[hep-th]. We especially focus on the…

High Energy Physics - Theory · Physics 2018-08-01 Yuji Sugawara , Takahiro Uetoko

This paper addresses several unsettled issues associated with string creation in systems of orthogonal Dp-D(8-p) branes. The interaction between the branes can be understood either from the closed string or open string picture. In the…

High Energy Physics - Theory · Physics 2009-11-19 Ling-Yan Hung

We study M5 branes by considering the selfdual strings parallel to a plane. With the internal oscillation frozen, each selfdual string gives a 5d SYM field. All selfdual strings together give a 6d field with 5 scalars, 3 gauge degrees of…

High Energy Physics - Theory · Physics 2012-07-06 Shan Hu , Dimitri Nanopoulos

We investigate the anomalous creation of fundamental strings using the boundary state formalism of fractional D-branes on ALE spaces in the orbifold limit. The open string Witten index plays a crucial role in this calculation and so the…

High Energy Physics - Theory · Physics 2009-10-31 Tadashi Takayanagi

We deal with scalar field coupled to gravity in five dimensions in warped geometry. We investigate models described by potentials that drive the system to support thick brane solutions that engender internal structure. We find analytical…

High Energy Physics - Theory · Physics 2009-11-10 D. Bazeia , C. Furtado , A. R. Gomes

In this work we study the dynamics of branes on group manifolds G deep in the stringy regime. After giving a brief overview of the various branes that can be constructed within the boundary conformal field theory approach, we analyze in…

High Energy Physics - Theory · Physics 2010-02-03 Stefan Fredenhagen , Volker Schomerus

We analyze BPS equations for string-like configurations derived from the M5-brane worldvolume action with a Nambu-Poisson structure constructed in arXiv:0804.3629, arXiv:0805.2898. We solve the BPS equations up to the first order in the…

High Energy Physics - Theory · Physics 2009-09-24 Kazuyuki Furuuchi , Tomohisa Takimi

We consider Z2, freely acting orbifolds of the type IIB string with 16 parallel D5-branes. When the string is compactified on T2 X T4 and the D5-branes are wrapped on T2, these systems possess N=2 supersymmetry, originating from the…

High Energy Physics - Theory · Physics 2008-11-26 Andrea Gregori

We construct two-dimensional N=(2,2) supersymmetric gauge theories with orthogonal and symplectic groups using branes and orientifold planes in Type IIA string theory. A number of puzzles regarding the construction, including the effect of…

High Energy Physics - Theory · Physics 2018-08-29 Oren Bergman , Eran Avraham

In this article, applying different types of boundary conditions; Dirichlet, Neumann, or Mixed, on open strings we realize various new brane bound states in string theory. Calculating their interactions with other D-branes, we find their…

High Energy Physics - Theory · Physics 2009-10-07 M. M. Sheikh-Jabbari

Magnetic quivers have led to significant progress in the understanding of gauge theories with 8 supercharges at UV fixed points. For a given low-energy gauge theory realised via a Type II brane construction, there exist magnetic quivers for…

High Energy Physics - Theory · Physics 2020-08-13 Antoine Bourget , Julius F. Grimminger , Amihay Hanany , Marcus Sperling , Zhenghao Zhong

We study the central charges of the supersymmetry algebra of branes in backgrounds corresponding to wrapped M5-branes. In the case of M5-branes wrapping a holomorphic 2-cycle in two complex-dimensional space, we find this allows for a…

High Energy Physics - Theory · Physics 2009-11-11 José Sánchez Loureda , Douglas J. Smith

We show how the topological string partition function, which is known to capture the degeneracies of a gas of BPS spinning M2-branes in M-theory compactified to 5 dimensions, is related to a 4-dimensional D-brane system that consists of…

High Energy Physics - Theory · Physics 2007-05-23 Robbert Dijkgraaf , Cumrun Vafa , Erik Verlinde

Unstable D-branes are central objects in string theory, and exist also in time-dependent backgrounds. In this paper we take first steps to studying brane decay in spacetime orbifolds. As a concrete model we focus on the R^{1,d}/Z_2…

High Energy Physics - Theory · Physics 2008-11-26 Shinsuke Kawai , Esko Keski-Vakkuri , Robert G. Leigh , Sean Nowling

We review the structure and symmetry properties of the worldvolume action for the M-theory 5-brane and of its equations of motion.

High Energy Physics - Theory · Physics 2007-05-23 Dmitri Sorokin