QCD Meets Gravity 2023

Session

Monday PM 2

11 Dec 2023, 16:00

4/3-006 - TH Conference Room (CERN)

Conveners

Monday PM 2: Bootstrap

• Radu Roiban

8. No EFT for massive higher spins

Francesco Riva

11/12/2023, 16:00

Massive resonances with spin larger or equal 2 are ubiquitous in physics, but their mass is always larger than their inverse size (the EFT cutoff). I will show that this condition follows from the requirement that the underlying theory be unitary and causal.

9. Regge Trajectories from Pion Scattering at Large N

Alessandro Vichi

11/12/2023, 16:30

I explore the Effective Field Theory bootstrap formalism, leveraging dispersion relations to establish sum rules linking low-energy scattering amplitudes to high-energy partial wave expansion. We analyze the impact of different Regge behaviors at large energies and apply the formalism to study Pion Scattering at large-N. Imposing the presence of spin-2 states, we derive a mass bound for...

10. Dilaton Scattering and Regge Trajectories

Denis Karateev

11/12/2023, 17:00

I will discuss scattering amplitudes of neutral Goldstone bosons such as dilatons, pions or branons. I will construct non-perturbative bounds on the dimensionless ratios of Wilson coefficient describing their low energy behaviour. I will then analyse scattering amplitudes saturating the above bounds. I will show that these amplitudes in some parameter range contain resonances with complex...