Eva Silverstein | Stanford - Academia.edu (original) (raw)
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Papers by Eva Silverstein
Journal of High Energy Physics, 2002
AIP Conference Proceedings, 2009
Journal of High Energy Physics, 2005
We argue that closed string tachyons drive two spacetime topology changing transitions --- loss o... more We argue that closed string tachyons drive two spacetime topology changing transitions --- loss of genus in a Riemann surface and separation of a Riemann surface into two components. The tachyons of interest are localized versions of Scherk-Schwarz winding string tachyons arising on Riemann surfaces in regions of moduli space where string-scale tubes develop. Spacetime and world-sheet renormalization group analyses
Journal of High Energy Physics - J HIGH ENERGY PHYS, 1999
It has recently been suggested that in certain special nonsupersymmetric type II string compactif... more It has recently been suggested that in certain special nonsupersymmetric type II string compactifications, at least the first two perturbative contributions to the cosmological constant Lambda vanish. Support for perturbative vanishing beyond 1-loop (as well as evidence for the absence of some nonperturbative contributions) has come from duality arguments. There was also a direct 2-loop computation which was incomplete; in this note we explain the deficiency of the previous 2-loop calculation and discuss the complete 2-loop computation in two different models. The corrected analysis yields a vanishing 2-loop contribution to Lambda in these models.
Journal of High Energy Physics, 2004
Journal of High Energy Physics, 2000
Classical and Quantum Gravity, 2000
The Theoretical Advanced Study Institute (TASI) in Elementary Particle Physics has been held ever... more The Theoretical Advanced Study Institute (TASI) in Elementary Particle Physics has been held every summer since 1984, and since 1989 at the University of Colorado in Boulder. It is aimed at advanced graduate students in the broad areas of string theory, phenomenological particle theory, and particle astrophysics. The lecture note series have been in great demand for many years after their publication, as a reference for students, researchers, and teachers. Many of the topics presented at the TASI 99 Summer School were an outgrowth ...
How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anis... more How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anisotropies in the CMB are a Rosetta stone for understanding the evolution of the universe. Through detailed measurements one may address everything from the physics of the birth of the universe to ...
Journal of High Energy Physics, 2002
AIP Conference Proceedings, 2009
Journal of High Energy Physics, 2005
We argue that closed string tachyons drive two spacetime topology changing transitions --- loss o... more We argue that closed string tachyons drive two spacetime topology changing transitions --- loss of genus in a Riemann surface and separation of a Riemann surface into two components. The tachyons of interest are localized versions of Scherk-Schwarz winding string tachyons arising on Riemann surfaces in regions of moduli space where string-scale tubes develop. Spacetime and world-sheet renormalization group analyses
Journal of High Energy Physics - J HIGH ENERGY PHYS, 1999
It has recently been suggested that in certain special nonsupersymmetric type II string compactif... more It has recently been suggested that in certain special nonsupersymmetric type II string compactifications, at least the first two perturbative contributions to the cosmological constant Lambda vanish. Support for perturbative vanishing beyond 1-loop (as well as evidence for the absence of some nonperturbative contributions) has come from duality arguments. There was also a direct 2-loop computation which was incomplete; in this note we explain the deficiency of the previous 2-loop calculation and discuss the complete 2-loop computation in two different models. The corrected analysis yields a vanishing 2-loop contribution to Lambda in these models.
Journal of High Energy Physics, 2004
Journal of High Energy Physics, 2000
Classical and Quantum Gravity, 2000
The Theoretical Advanced Study Institute (TASI) in Elementary Particle Physics has been held ever... more The Theoretical Advanced Study Institute (TASI) in Elementary Particle Physics has been held every summer since 1984, and since 1989 at the University of Colorado in Boulder. It is aimed at advanced graduate students in the broad areas of string theory, phenomenological particle theory, and particle astrophysics. The lecture note series have been in great demand for many years after their publication, as a reference for students, researchers, and teachers. Many of the topics presented at the TASI 99 Summer School were an outgrowth ...
How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anis... more How did the universe evolve? The fine angular scale (l>1000) temperature and polarization anisotropies in the CMB are a Rosetta stone for understanding the evolution of the universe. Through detailed measurements one may address everything from the physics of the birth of the universe to ...