Conveners
W3-5 Cosmology and Astrophysics (DTP-DIMP-PPD) / Cosmologie et astrophysique (DPT-DPIM-PPD)
- Mohammad Ahmady (Mount Allison University)
Tom Steele
(U of Saskatchewan)
15/06/2016, 15:15
Theoretical Physics / Physique théorique (DTP-DPT)
Invited Speaker / Conférencier invité
One of the possible custodial symmetries responsible for naturalness in the Standard Model is conformal (scale invariance) symmetry of the Lagrangian. After a brief review of the Higgs mechanism in the classically-conformal Standard Model, Higgs-portal singlet extensions as a model for dark matter are introduced. Results for the dark matter mass and cosmological abundance predictions in...
Valerio Faraoni
(Bishop's University)
15/06/2016, 15:45
Theoretical Physics / Physique théorique (DTP-DPT)
Oral (Non-Student) / orale (non-étudiant)
In an accelerating universe there is a maximum radius above which a shell of test particles cannot collapse and is dispersed by the cosmic expansion. This radius could
be used in conjunction with observations of large structures to constrain the
equation of state of the universe. We express the turnaround radius in general relativity in terms of the Hawking quasilocal mass and we extend...
Réjean Plamondon
(École Polytechnique de Montréal)
15/06/2016, 16:00
Theoretical Physics / Physique théorique (DTP-DPT)
Oral (Non-Student) / orale (non-étudiant)
This paper analyses the outcome of a new metric [1] that describes the space-time geometry of a static symmetric massive celestial object. It is based on an *erfc* potential that characterizes the gravitation field emerging from this model. The metric relies on an intrinsic physical constant σ, a star-specific proper length that scales measurements in its surroundings. Although σ must be...
Gabor Kunstatter
(University of Winnipeg)
15/06/2016, 16:15
Theoretical Physics / Physique théorique (DTP-DPT)
Oral (Non-Student) / orale (non-étudiant)
I will first briefly review the key features of the black hole information loss paradox and the famous “firewall” resolution of Almheiri, Marolf, Polchinski and Susskind. I will then go on to describe work on a different, considerably more mundane solution to the problem based on the observation that the singularity at the center of all black holes lies at the heart of the information loss...
