HE Seminar
Speaker:
Title:
Host: Bob Svoboda
Room: 416
User:
High-Energy Seminars
Time:
5:00am - 6:00am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
LHC Lunch
Speaker:
Title:
Host: Markus Luty
Room: 432
User:
High-Energy Seminars
Time:
5:30am - 6:30am
Description:
Joint Theory Seminar
Speaker: Jeff Fortin
Title: Scale without Conformal Invariance
Host: Luty
Room: 432
Abstract: We investigate the theoretical implications of scale without
conformal invariance in quantum field theory. We argue that the RG flows
of such theories correspond to recurrent behaviors, i.e. limit cycles or
ergodicity. We discuss the implications for the a-theorem and show how
dilatation generators do generate dilatations. Finally, we discuss
well-behaved non-conformal scale-invariant examples.
Joint Theory Seminar
Speaker: Rachel Rosen(Columbia)
Title: Bimetric gravity from ghost-free massive gravity
Host: Nemanja Kaloper
Room: 432
User:
High-Energy Seminars
Time:
8:10am - 9:10am
Send Reminder:
Yes - 1 day 8 hour 0 minutes before start
Description:
HE Seminar
Speaker: Dmitry Bandurin
Title: (TBC) Measuring Double Parton events at D0
Host: Mike Mulhearn
Room: 416
Abstract:
User:
High-Energy Seminars
Time:
5:00am - 6:00am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
LHC Lunch
Speaker:
Title:
Host: Markus Luty
Room: 432
User:
High-Energy Seminars
Time:
7:00am - 8:00am
Send Reminder:
Yes - 0 days 4 hour 0 minutes before start
Description:
Joint HEFTI/string theory seminar
Speaker: Jorge Santos (Santa Barbara)
Title: Gravitational turbulent instability of Anti-de Sitter space
Host: Steve Carlip
Room: 432
Abstract: Bizon and Rostworowski have recently suggested that anti-de Sitter spacetime might be nonlinearly unstable to transfering energy to smaller and smaller scales and eventually forming a small black hole. We consider pure gravity with a negative cosmological constant and find strong support for this idea. While one can start with a single linearized mode and add higher order corrections to construct a nonlinear geon, this is not possible starting with a linear combination of two or more modes. One is forced to add higher frequency modes with growing amplitude. The implications of this turbulent instability for the dual field theory are discussed.
User:
High-Energy Seminars
Time:
5:30am - 6:30am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: (TBC) Eric Zimmerman-- U. Colorado
Title: Indication of nonzero 0_13 from T2K
Abstract:
Host: Robin Erbacher
Room: 432
User:
High-Energy Seminars
Time:
8:10am - 9:10am
Send Reminder:
Yes - 1 day 8 hour 0 minutes before start
Description:
HE Seminar
Speaker:
Title:
Host:
Room: 416
User:
High-Energy Seminars
Time:
5:00am - 6:00am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
LHC Lunch
Speaker:
Title:
Host: Markus Luty
Room: 432
User:
High-Energy Seminars
Time:
5:30am - 6:30am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
Joint Theory Seminar
Speaker: cancelled for DOE
Title:
Host:
Room: 432
User:
High-Energy Seminars
Time:
8:10am - 9:10am
Send Reminder:
Yes - 1 day 8 hour 0 minutes before start
Description:
HE Seminar
Speaker: David Marsh (Oxford)
Title: Ultra-light Axions: Degeneracies with Massive Neutrinos and Forecasts for Future Cosmological Observations
Host: Nemanja Kaloper
Room: 416
Abstract:
A generic prediction of string theory is the existence of many axion fields. It has recently been argued that many of these fields should be light and, like the well known QCD axion, lead to observable cosmological consequences. In this paper we study in detail the effect of the so-called string axiverse on large scale structure, focusing on the morphology and evolution of density perturbations, anisotropies in the cosmic microwave background and weak gravitational lensing of distant galaxies. We quantify specific effects that will arise from the presence of the axionic fields and highlight possible degeneracies that may arise in the presence of massive neutrinos. We take particular care understanding the different physical effects and scales that come into play. We then forecast how the string axiverse may be constrained and show that with a combination of different observations, it should be possible to detect a fraction of ultralight axions to dark matter of a few percent.
I focus on the lightest axions, with mass <10^{-28}eV, and present a exact numerical study on their cosmological effects. I will briefly introduce axions in string theory and their motivation as an ultra-light dark matter ingredient based in part on the observance of excess relativistic energy density and neutrino masses. I will then review their known effects on large scale structure, before presenting new work on precision observables and forecasts for a Euclid-style mission. I may also review some other work on an extension of this model to include coupling to other moduli fields.
User:
High-Energy Seminars
Time:
4:00am - 5:00am
Send Reminder:
Yes - 1 day 4 hour 0 minutes before start
Description:
LHC Lunch
Speaker:
Title:
Host: Markus Luty
Room: 432
9:10am» HE Seminar - hold for Bob