Triangle Seminars
Monday, 17 Feb 2020
Complete 1st post-Minkowskian potential from scattering amplitudes
Sangmin Lee
(Seoul National University)
Abstract:
Building upon recent progress in applying amplitude techniques to perturbative general relativity, we propose a closed-form formula for the conservative Hamiltonian of a spinning binary system at the 1st post-Minkowskian order. It is applicable for general spinning bodies with arbitrary spin multipole moments. It is linear in gravitational constant by definition, but exact to all orders in momentum and spin expansions. At each spin order, our formula implies that the spin-dependence and momentum dependence factorize completely. We compare our formula to a similar one derived in 2017 from a spinning test-body near a Kerr black hole and find perfect agreement.
Building upon recent progress in applying amplitude techniques to perturbative general relativity, we propose a closed-form formula for the conservative Hamiltonian of a spinning binary system at the 1st post-Minkowskian order. It is applicable for general spinning bodies with arbitrary spin multipole moments. It is linear in gravitational constant by definition, but exact to all orders in momentum and spin expansions. At each spin order, our formula implies that the spin-dependence and momentum dependence factorize completely. We compare our formula to a similar one derived in 2017 from a spinning test-body near a Kerr black hole and find perfect agreement.
Posted by: QMW
Tuesday, 18 Feb 2020
Some impractical practicalities of the SMEFT
Michael Trott
(Niels Bohr Institute)
Abstract:
In recent years the use of effective field theory techniques has come to the fore when studying the LHC data set. This approach constrains the possible effects of physics beyond the Standard Model, by constraining small modifications of Standard Model interactions in a theory known as the Standard Model Effective Field Theory. Although highly practical and agnostic, the presence of a Higgs field that takes on a background expectation value leads to some unique challenges in formulating this
effective field theory and interfacing the SMEFT with the data. We will review some of the successes of this approach and some of the problems that have appeared. A growing understanding of the physics of the SMEFT as emerging from the geometry of Higgs field space offers great potential to tackle some of the remaining challenges. We will also introduce and discuss this approach.
In recent years the use of effective field theory techniques has come to the fore when studying the LHC data set. This approach constrains the possible effects of physics beyond the Standard Model, by constraining small modifications of Standard Model interactions in a theory known as the Standard Model Effective Field Theory. Although highly practical and agnostic, the presence of a Higgs field that takes on a background expectation value leads to some unique challenges in formulating this
effective field theory and interfacing the SMEFT with the data. We will review some of the successes of this approach and some of the problems that have appeared. A growing understanding of the physics of the SMEFT as emerging from the geometry of Higgs field space offers great potential to tackle some of the remaining challenges. We will also introduce and discuss this approach.
Posted by: IC
TBA
Jose Edelstein
(Santiago de Compostela)
Wednesday, 19 Feb 2020
Polygon Seminar KCL: Symmetries and energy in general relativity
📍 London
Mahdi Godazgar
(QMUL)
Abstract:
I will review the relation between symmetries and charges and explain how this works in the context of gravity. I will then explain how dual charges can be derived from a similar procedure.
I will review the relation between symmetries and charges and explain how this works in the context of gravity. I will then explain how dual charges can be derived from a similar procedure.
Posted by: oxford
t.b.a.
Volker Schomerus
(Desy)
Abstract:
t.b.a. –––- Part of the London Integrability Journal Club. If you are not already registered, please sign up at integrability-london.weebly.com/registration.html. The link will be emailed.
t.b.a. –––- Part of the London Integrability Journal Club. If you are not already registered, please sign up at integrability-london.weebly.com/registration.html. The link will be emailed.
Posted by: andrea
Thursday, 20 Feb 2020
AdS black holes and deconfinement
Seok Kim
(Seoul National University)
Abstract:
I will explain the physics of BPS black holes in AdS/CFT in 4 and 3 dimensions, focussing on the deconfined phases of the field theories.
I will explain the physics of BPS black holes in AdS/CFT in 4 and 3 dimensions, focussing on the deconfined phases of the field theories.
Posted by: QMW
Friday, 21 Feb 2020
Graduate Lectures: Black Holes in AdS/CFT
Seok Kim
(Seoul National University)
Abstract:
Introduction: black hole thermodynamics; black holes in AdS; holographic viewpoint from (N=4 super) Yang-Mills
Introduction: black hole thermodynamics; black holes in AdS; holographic viewpoint from (N=4 super) Yang-Mills
Posted by: QMW