Research Work and Personal Information

PhD Thesis : Here you will find my PhD thesis (gzipped postscript file, 101 pages, January 1995).

---

Research Papers:

arXiv:1111.2070 [hep-th] [abs, ps, pdf, other]:

Title: Confirmation of the Secondary Constraint and Absence of Ghost in Massive Gravity and Bimetric Gravity
Authors: S. F. Hassan Rachel A. Rosen
Comments: 15 pages

arXiv:1111.1655 [gr-qc] [abs, ps, pdf, other]:

Title: Cosmological Solutions in Bimetric Gravity and their Observational Tests
Authors: Mikael von Strauss, Angnis Schmidt-May, Jonas Enander, Edvard Mortsell, S. F. Hassan
Comments: 24 pages

arXiv:1109.3515 [hep-th] [abs, ps, pdf, other]:

Title: Bimetric Gravity from Ghost-free Massive Gravity
Authors: S. F. Hassan Rachel A. Rosen
Comments: 11 pages

arXiv:1109.3230 [hep-th] [abs, ps, pdf, other]:

Title: Ghost-free Massive Gravity with a General Reference Metric
Authors: S. F. Hassan Rachel A. Rosen Angnis Schmidt-May
Comments: 24 pages

arXiv:1106.3344 [hep-th] [abs, ps, pdf, other]:

Title: Resolving the Ghost Problem in non-Linear Massive Gravity
Authors: S. F. Hassan Rachel A. Rosen
Comments: 4 pages

arXiv:1104.1373 [hep-th] [abs, ps, pdf, other]:

Title: Exact Solution to the "Auxiliary Extra Dimension" Model of Massive Gravity
Authors: S. F. Hassan Rachel A. Rosen
Comments: LaTeX, 8 pages
Journal-ref: Phys.Lett.B702:90-93,2011.

arXiv:1103.6055[hep-th] [abs, ps, pdf, other]:

Title: On Non-Linear Actions for Massive Gravity
Authors: S. F. Hassan Rachel A. Rosen
Comments:LaTeX, 22 pages
Journal-ref: JHEP 1107:009,2011.

arXiv:1007.1263[hep-th] [abs, ps, pdf, other]:

Title: Brane Induced Gravity, its Ghost and the Cosmological Constant Problem
Authors: S. F. Hassan Stefan Hofmann Mikael von Strauss
Comments:LaTeX, 41 pages, 3 eps figures
Journal-ref: JCAP 1101:020,2011

hep-th/0312224 [abs, ps, pdf, other] :

Title: D-branes in the NS5 Near-horizon pp-Wave Background
Authors: S. F. Hassan, Rashmi R. Nayak, Kamal L. Panigrahi
Comments: 12 pages, LaTeX

hep-th/0308201 [abs, ps, pdf, other] :

Title: N=1 Worldsheet Boundary Couplings and Covariance of non-Abelian Worldvolume Theory
Authors: S. F. Hassan
Comments: 30 pages, LaTeX

hep-th/0204110 [abs, src, ps, other] :

Title: Trans-Planckian Effects in Inflationary Cosmology and the Modified Uncertainty Principle
Authors: S. F. Hassan, Martin S. Sloth
Comments: Latex, 23 pages, 3 eps figures
Journal-ref: Nucl. Phys. B674 (2003) 434-458

hep-th/0202187 [abs, src, ps, other] :

Title: A Space-Time Orbifold: A Toy Model for a Cosmological Singularity
Authors: Vijay Balasubramanian, S. F. Hassan, Esko Keski-Vakkuri, Asad Naqvi
Comments: 21 pages, 2 figures
Journal-ref: Phys. Rev. D67 (2003) 026003

hep-th/0103149 [abs, src, ps, other] :

Title: Supersymmetry and the Systematics of T-duality Rotations in Type-II Superstring Theories
Author: S. F. Hassan (HIP)
Comments: 6 pages, LaTeX, uses espcrc2.sty; Contribution to the proceedings of the D. V. Volkov memorial conference on ``Supersymmetry and Quantum Field Theory'', Kharkov, July 25-29, 2000
Journal-ref: Nucl.Phys.Proc.Suppl. 102 (2001) 77-82

hep-th/0008149 [abs, src, ps, other] :

Title: D-brane Couplings, RR Fields and Clifford Multiplication
Authors: S. F. Hassan, R. Minasian (Ecole Polytechnique)
Comments: 17 pages, LaTeX

hep-th/9912236 [abs, src, ps, other] :

Title: SO(d,d) Transformations of Ramond-Ramond Fields and Space-time Spinors
Author: S. F. Hassan
Comments: 25 pages, LaTeX
Journal-ref: Nucl. Phys. B583 (2000) 431-453

hep-th/9907152 [abs, src, ps, other] :

Title: T-Duality, Space-time Spinors and R-R Fields in Curved Backgrounds
Author: S. F. Hassan
Comments: 19 pages, LaTeX
Journal-ref: Nucl. Phys. B568 (2000) 145-161

hep-th/9712213 [abs, src, ps, other] :

Title: Gauge Theory Description of D-brane Black Holes: Emergence of the Effective SCFT and Hawking Radiation
Authors: S. F. Hassan, Spenta R. Wadia
Comments: 24 pages, LaTeX
Journal-ref: Nucl. Phys. B526 (1998) 311

hep-th/9703163 [abs, src, ps, other] :

Title: D-brane Black Holes: Large-N Limit and the Effective String Description
Authors: S. F. Hassan, Spenta R. Wadia
Comments: 13 pages, LaTeX
Journal-ref: Phys.Lett. B402 (1997) 43-52

hep-th/9701069 [abs, src, ps, other] :

Title: Introduction to S-Duality in N=2 Supersymmetric Gauge Theories (A pedagogical review of the work of Seiberg and Witten)
Authors: L. Alvarez-Gaume, S. F. Hassan (Theory Division, CERN)
Comments: Latex file with seven eps figures, 81 pages
Journal-ref: Fortschr.Phys. 45 (1997) 159-236

hep-th/9511056 [abs, src, ps, other] :

Title: T-Duality and Non-Local Realizations of Supersymmetry in String Theory
Author: S. F. Hassan
Comments: 6 pages, Latex, Talk presented at the Workshop on Strings, Gravity and Related Topics, Trieste, 29-30 June 1995
Published in: Proceedings of the ICTP Workshop on Strings, Gravity and Related Topics, Trieste (July 1995)

hep-th/9504148 [abs, src, ps, other] :

Title: T-Duality and Non-Local Supersymmetries
Author: S. F. Hassan
Comments: 19 pages, Latex
Journal-ref: Nucl.Phys. B460 (1996) 362

hep-th/9408060 [abs, src, ps, other] :

Title: O(d,d;R) Deformations of Complex Structures and Extended Worldsheet Supersymmetry
Author: S. F. Hassan
Comments: 19 pages, Latex
Journal-ref: Nucl. Phys. B454 (1995) 86

hep-th/9210121 [abs, src, ps, other] :

Title:Marginal Deformations of WZNW and Coset Models from O(d,d) Transformation
Authors: S. F. Hassan, Ashoke Sen
Comments: 26 pages, phyzzx.tex, TIFR-TH-92-61
Journal-ref: Nucl. Phys. B405 (1993) 143

hep-th/9109038 [abs, src, ps, other] :

Title: Twisting Classical Solutions in Heterotic String Theory
Authors: S. F. Hassan, Ashoke Sen
Comments: 20 pages, TeX
Journal-ref: Nucl. Phys. B375 (1992) 103-118

TIFR Colloquim Talk [ps] :

Title: O(d,d) Transformations, Marginal Deformations and the Coset Construction in WZNW Models
Author: S. F. Hassan,
Comments: 7 pages, Latex, Talk presented at the International Colloquium on Modern Quantum Field Theory-II, Bombay 1994
Available at: http://theory.tifr.res.in/group/colloq/articles.html