2018 CAP Congress / Congrès de l'ACP 2018

Session

W3-3 Fields and Strings II (DTP) | Champs et cordes II (DPT)

W3-3

13 Jun 2018, 13:30

Dalhousie University

Conveners

W3-3 Fields and Strings II (DTP) | Champs et cordes II (DPT)

• Simon Caron-Huot (McGill University)

1951. Renormalisation of non-perturbative calculations in scalar theories (I)

Prof. Margaret Carrington (Brandon University)

13/06/2018, 13:30

Theoretical Physics / Physique théorique (DTP-DPT)

Invited Speaker / Conférencier(ère) invité(e)

Non-perturbative techniques are needed to study strongly coupled systems. One powerful approach is the n-particle irreducible effective action. The technique provides a systematic expansion for which the truncation occurs at the level of the action. However, renormalisation using a standard counterterm approach is not well understood. At the 2PI level one must introduce multiple counterterms,...

2271. From the Chiral Lagrangian to the EFT on a Single M5-Brane (I)

Dr Freddy Cachazo (Perimeter Institute)

13/06/2018, 14:00

Theoretical Physics / Physique théorique (DTP-DPT)

Invited Speaker / Conférencier(ère) invité(e)

The CHY technique for computing scattering amplitudes has been used in a large variety of theories ranging from Einstein gravity to the Chiral Lagrangian. Many of these theories have in common that they are effective field theories (EFTs) of spontaneously broken symmetries. In this talk I will review recent results relating these effective field theories including the recent formula for the...

2032. Open EFTs and Gravity as a Medium (I)

Prof. Cliff Burgess (McMaster U/Perimeter Inst.)

13/06/2018, 14:30

Theoretical Physics / Physique théorique (DTP-DPT)

Invited Speaker / Conférencier(ère) invité(e)

Precision calculations in de Sitter space (such as of inflationary predictions for primordial fluctuations) are often plagued by infrared problems and issues of secular time dependence. Similar issues about the breakdown of perturbation theory seem also to arise for information loss in black holes. This talk briefly summarizes how related problems can arise in other areas of physics, and how...