INPP Demokritos-APCTP meeting and HOCTOOLS-II mini-workshop

Contribution List

31. Welcome

Christos Markou (Director of INPP)

30/09/2024, 09:45

9. Holographic Mean field theory and Kondo lattice.

Sang-Jin Sin

30/09/2024, 10:00

10. Classification of Fermionic RCFTs and Topological Phases Revisited

Sungjay Lee

30/09/2024, 11:00

11. Schwarzschild Black Hole from Perturbation Theory to All Orders

Kanghoon Lee

30/09/2024, 14:00

Applying the quantum field theoretic perturbiner approach to Einstein gravity, we compute the metric of a Schwarzschild black hole order by order in perturbation theory. Using recursion, this perturbative calculation can be carried out in de Donder gauge to all orders in Newton’s constant. The result is a geometric series which is convergent outside a disk of finite radius, and it agrees within...

12. Predictions for dense matter and neutron stars from the gauge/gravity duality

Matti Jarvinen

30/09/2024, 15:00

The gauge/gravity duality, combined with information from lattice QCD, nuclear theory, and perturbative QCD, can be used to obtain predictions for the equation of state and transport in hot and dense QCD. I give an overview of an approach based on the holographic V-QCD model, which includes both nuclear and quark matter phases, separated by a first order phase transition. I demonstrate that...

23. Invariant tension in gravity

Constantin Bachas

30/09/2024, 16:30

17. Landau singularities from Whitney stratifications

Georgios Papathanasiou

30/09/2024, 17:30

14. Finite Feynman Integrals

David Kosower

01/10/2024, 10:00

Classifying and organizing Feynman integrals according to their degree of divergence may be a useful tool in presenting scattering amplitudes. In this talk, I focus on the first step: systematically organizing and finding finite Feynman integrals. I will briefly discuss an approach based on Landau equations. I will then focus mostly on an approach based on Newton polytopes.

15. Subleading effects in soft-gluon emission at one-loop in massless QCD

Michal Czakon

01/10/2024, 11:00

2. Dilaton-Einstein-Gauss-Bonnet Gravity and its Cosmological Implication

Dr Bum-Hoon Lee

01/10/2024, 14:00

The dilaton-Einstein-Gauss-Bonnet(dEGB) Gravity is one of the simplest extensions of Einstein's gravity with the higher curvature term. After some motivation to go beyond Einstein's Gravity models, we briefly describe the dEGB model through the black holes. Unlike Einstein's gravity, we explain the existence of a minimum mass below which the black hole cannot be formed, which is the most...

18. Intersection Theory for Fundamental Physics

Pierpaolo Mastrolia

01/10/2024, 15:00

19. OPP at two loops

Konstantinos Papadopoulos (Nat. Cent. for Sci. Res. Demokritos (GR))

01/10/2024, 16:30

21. Towards numerical computation of dimensionally regularised QCD helicity amplitudes

Giuseppe Bevilacqua

01/10/2024, 17:30

16. Two loop QCD corrections to multiscale amplitudes: Progress towards ttj, wγγ and hbb final states

Simon Badger

03/10/2024, 10:00

I will discuss the progress towards providing the missing double virtual corrections to the listed final states using modern computational tools.

13. NNLO QCD phenomenology for 2-to-3 scattering process at the LHC: Wbb and photon+dijet final states

Heribertus Bayu Hartanto

03/10/2024, 11:00

20. Two-loop amplitude reduction in the HELAC framework

Aris Spourdalakis

03/10/2024, 14:00

I will present recent progress in constructing a generic two-loop amplitude reduction algorithm within the computational framework of HELAC. Following the well-known OPP reduction approach at one loop, a two loop amplitude approach is developed. I will also discuss the differences between the 4-2ε and pure 4 dimensional reduction fitting.

22. Analytic Continuation of Five-Point Two-Loop Master Integrals

Nikos Dokmetzoglou

03/10/2024, 15:00

28. Magnetic Defects in Conformal Field Theory

Matthew Roberts

03/10/2024, 16:30

Magnetic solenoids in quantum systems can have lead to novel and interesting physics in the deep infrared, owing to the fact that they can be classified by a number, the magnetic flux of the solenoid. We review the general physics of co-dimension two defects with an eye towards studying magnetic defects, and discuss new central charges that arise in these mixed dimensional systems. We comment...

30. A (super)gravitational perspective on magnetic defects

Christopher Rosen

03/10/2024, 17:30

Localized deformations of quantum field theories present interesting
opportunities to enhance our understanding of the features of such
theories at different length scales. This class of deformations is of
particular interest in light of its applicability to inhomogeneities
in cosmological settings, as well as interfaces and impurities in
condensed matter systems.

Despite the inherent...

24. Landscape of Yang Mills vacuum fields and condensation of magnetic fluxes in QCD

George Savvidy

04/10/2024, 10:00

The moduli space of covariantly constant gauge fields is infinite-dimensional and describes non-perturbative solutions of the Yang-Mills equation of superposed chromomagnetic flux tubes (vortices) of opposite magnetic charges. These gauge field configurations are stretched along the potential valleys of a constant energy density and are separated by potential barriers between classically...

25. Dielectric top membranes in plane-wave backgrounds

Georgios Linardopoulos

04/10/2024, 11:00

We investigate the large-N limit of the BMN matrix model by means of classical bosonic membranes that have spherical topology and spin inside the 11-dimensional maximally supersymmetric plane-wave background. First, we classify all possible M2-brane configurations based on the distribution of their components inside the SO(3) × SO(6) symmetric plane-wave spacetime. We then formulate some...

26. How Arnol’d cat maps probe the properties of black holes

Stam Nicolis

04/10/2024, 14:00

27. Nested holography

Kostas Filippas

04/10/2024, 15:00

29. A (super)gravitational perspective on magnetic defects

Christopher Rosen

Localized deformations of quantum field theories present interesting
opportunities to enhance our understanding of the features of such
theories at different length scales. This class of deformations is of
particular interest in light of its applicability to inhomogeneities
in cosmological settings, as well as interfaces and impurities in
condensed matter systems.

Despite the inherent...

6. Dielectric top membranes in plane-wave backgrounds

Dr Georgios Linardopoulos (Asia Pacific Center for Theoretical Physics)

We investigate the large-N limit of the BMN matrix model by means of classical bosonic membranes that have spherical topology and spin inside the 11-dimensional maximally supersymmetric plane-wave background. First, we classify all possible M2-brane configurations based on the distribution of their components inside the SO(3) × SO(6) symmetric plane-wave spacetime. We then formulate some...

4. Dilaton-Einstein-Gauss-Bonnet Gravity and its Cosmological Implication

Bum-Hoon Lee (Sogang University)

The dilaton-Einstein-Gauss-Bonnet(dEGB) Gravity is one of the simplest extensions of Einstein's gravity with the higher curvature term. After some motivation to go beyond Einstein's Gravity models, we briefly describe the dEGB model through the black holes. Unlike Einstein's gravity, we explain the existence of a minimum mass below which the black hole cannot be formed, which is the most...

8. Magnetic Defects in Conformal Field Theory

Matthew Roberts (APCTP)

Magnetic solenoids in quantum systems can have lead to novel and interesting physics in the deep infrared, owing to the fact that they can be classified by a number, the magnetic flux of the solenoid. We review the general physics of co-dimension two defects with an eye towards studying magnetic defects, and discuss new central charges that arise in these mixed dimensional systems. We comment...

1. OPP at two loops

Konstantinos Papadopoulos (Nat. Cent. for Sci. Res. Demokritos (GR))

Discuss OPP at two loops, for integrand level reduction within HELAC2LOOP.

5. Predictions for dense matter and neutron stars from the gauge/gravity duality

Matti Jarvinen

The gauge/gravity duality, combined with information from lattice QCD, nuclear theory, and perturbative QCD, can be used to obtain predictions for the equation of state and transport in hot and dense QCD. I give an overview of an approach based on the holographic V-QCD model, which includes both nuclear and quark matter phases, separated by a first order phase transition. I demonstrate that...

7. Schwarzschild Black Hole from Perturbation Theory to All Orders

Kanghoon Lee (APCTP)

Applying the quantum field theoretic perturbiner approach to Einstein gravity, we compute the metric of a Schwarzschild black hole order by order in perturbation theory. Using recursion, this perturbative calculation can be carried out in de Donder gauge to all orders in Newton’s constant. The result is a geometric series which is convergent outside a disk of finite radius, and it agrees within...