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CERN Document Server 找到 7 笔记录  检索需时 1.35 秒. 
1.
Fermion Wavefunctions in Magnetized branes : Theta identities and Yukawa couplings / Antoniadis, Ignatios (CERN) ; Kumar, Alok (Bhubaneswar, Inst. Phys.) ; Panda, Binata (CERN ; Bhubaneswar, Inst. Phys.)
Computation of Yukawa couplings, determining superpotentials as well as the Kähler metric, with oblique (non-commuting) fluxes in magnetized brane constructions is an interesting unresolved issue, in view of the importance of such fluxes for obtaining phenomenologically viable models. In order to perform this task, fermion (scalar) wavefunctions on toroidally compactified spaces are presented for general fluxes, parameterized by Hermitian matrices with eigenvalues of arbitrary signatures. [...]
arXiv:0904.0910; CERN-PH-TH-2009-042; CERN-PH-TH-2009-042.- Geneva : CERN, 2009 - 77 p. - Published in : Nucl. Phys. B 823 (2009) 116-173 Fulltext: PDF; External link: Preprint
2.
Supersymmetric SU(5) GUT with Stabilized Moduli / Antoniadis, Ignatios (CERN) ; Kumar, Alok (Bhubaneswar, Inst. Phys.) ; Panda, Binata (Bhubaneswar, Inst. Phys.)
We construct a minimal example of a supersymmetric grand unified model in a toroidal compactification of type I string theory with magnetized D9-branes. All geometric moduli are stabilized in terms of the background internal magnetic fluxes which are of "oblique" type (mutually non-commuting). [...]
arXiv:0709.2799; CERN-PH-TH-2007-163.- Geneva : CERN, 2008 - 48 p. - Published in : Nucl. Phys. B 795 (2008) 69-104 External link: Fulltext
3.
Non-Planar String Networks on Tori / Kumar, Alok (CERN ; Bhubaneswar, Inst. Phys.)
Type II strings in D=5 contain particle-like 1/8 supersymmetric BPS states. In this note we give a string-network representation of such states by considering (periodic) non-planar $(p,q,r)$-string networks of eight dimensional type II string theory on $T^3$. [...]
hep-th/0002150; CERN-TH-2000-059; CERN-TH-2000-059.- Geneva : CERN, 2000 - 11 p. - Published in : JHEP 03 (2000) 010 Access to fulltext document: PDF; Fulltext: PDF; SISSA/IOP Published version, local copy: PDF; External link: Preprint - Please contact the library if you need to access this document.
4.
Charged Macroscopic type II Strings and their Networks / Kumar, Alok (CERN ; Bhubaneswar, Inst. Phys.)
We write down charged macroscopic string solutions in type II string theories, compactified on torii, and present an explicit solution of the spinor Killing equations to show that they preserve 1/2 of the type II supersymmetries. The S-duality symmetry of the type IIB string theory in ten-dimensions is used to write down the SL(2,Z) multiplets of such strings and the corresponding 1/2 supersymmetry conditions. [...]
hep-th/9911090; CERN-TH-99-343; CERN-TH-99-343.- Geneva : CERN, 1999 - 26 p. - Published in : JHEP 12 (1999) 001 Access to fulltext document: PDF; Fulltext: PDF; SISSA/IOP Published version, local copy: PDF; External link: hep-th/9911090 PDF - Please contact the library if you need to access this document.
5.
A Note on Orientifolds and Dualities of Type 0B String Theory / Blumenhagen, Ralph (Humboldt U., Berlin) ; Kumar, Alok (CERN ; Bhubaneswar, Inst. Phys.)
We generalize the construction of four dimensional non-tachyonic orientifolds of type 0B string theory to non-supersymmetric backgrounds. We construct a four dimensional model containing self-dual D3 and D9-branes and leading to a chiral anomaly-free massless spectrum. [...]
hep-th/9906234; HUB-EP-99-29; CERN-TH-99-190; HUB-EP-99-29; CERN-TH-99-190.- Berlin : Humboldt Univ., 1999 - 12 p. - Published in : Phys. Lett. B 464 (1999) 46-52 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-th/9906234 PDF - Please contact the library if you need to access this document.
6.
BPS States in N=3 Superstrings / Kounnas, Costas (CERN) ; Kumar, Alok (Harish-Chandra Res. Inst. ; Bhubaneswar, Inst. Phys.)
The N = 3 string models are special solutions of the type II perturbative string theories. We present explicit expressions for the helicity supertraces,which count the number of the perturbative BPS multiplets. [...]
hep-th/9709061; CERN-TH-97-194; LPTENS-97-29; MRI-PHY-970511; CERN-TH-97-194; LPT-ENS-97-29; MRI-PHY-97-511.- Geneva : CERN, 1998 - 29 p. - Published in : Nucl. Phys. B 511 (1998) 216-242 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-th/9709061 PDF - Please contact the library if you need to access this document.
7.
Gauged String Actions and O($\tilde{d}$, $\tilde{d}$) Transformation / Kumar, Alok (CERN ; Bhubaneswar, Inst. Phys.)
An O($\tilde{d}$, $\tilde{d}$) transformation is given which relates ungauged string actions to the gauged ones for a large class of models discussed recently by Giveon and Rocek. Interestingly, the transformation is background independent and has a unique matrix representation in a given space-time dimension..
hep-th/9206051; CERN-TH-6530-92; IP-BBSR-92-44; CERN-TH-6530-92; IP-BBSR-92-44.- Geneva : CERN, 1992 - 7 p. - Published in : Phys. Lett. B 293 (1992) 49-55 Fulltext: th-6530-92 - PS.GZ; arXiv:hep-th_9206051 - PDF; External link: hep-th/9206051 PDF - Please contact the library if you need to access this document.

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