Welcome from Head of School (via zoom)

• Peter Hobson (QMUL)

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 1: The (squared) amplituhedron and its boundary structure

• Paul Heslop

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 2: Hidden geometry in two-dimensional scattering

• Patrick Dorey (Durham University)

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 3: Classical Gravitational Scattering from a Gauge-Invariant Double Copy

• Andreas Brandhuber (Queen Mary University of London)

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 4: Computer Algebra and Special Function Algorithms for Feynman Integrals

• Carsten Schneider (Johannes Kepler University Linz)

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 5: Graviton particle statistics and coherent states from classical scattering amplitudes

• Ruth Britto

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 6: Applications of Scattering Amplitudes to Gravitational Waves (via Zoom)

• Zvi Bern (University of California Los Angeles (US))

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 7: Amplitude Singularities from Cluster Algebras and Tropical Geometry

• Georgios Papathanasiou

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 8: Waveforms from Amplitudes

• David Kosower (CEA-Saclay)

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 9: The Integrable Hypereclectic Spin Chain

• Matthias Staudacher (Max-Planck-Institut fuer Gravitationsphysik)

Room: G. O. Jones lecture theatre, G.O. Jones Building

SAGEX Network group photograph

Talk 10: Higher order corrections in QCD and Gravity (via Zoom)

• Johannes Bluemlein

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 11: Novel bootstraps leveraging the duality between color and kinematics (via Zoom)

• John Joseph Carrasco

Room: G. O. Jones lecture theatre, G.O. Jones Building

Colloquium: Spacetime, Quantum Mechanics and Scattering Amplitudes

• Nima Arkani-Hamed (IAS)

Room: Arts Two Building Lecture Theatre

Talk 12: Explicit gravity amplitudes on self-dual backgrounds

• Lionel Mason

Room: G. O. Jones lecture theatre, G.O. Jones Building We give formulae for all tree-level graviton scattering amplitudes in curved self-dual radiative space-times; these are chiral, source-free, asymptotically flat spaces determined by free characteristic data at null infinity. Such space-times admit an elegant description in terms of twistor theory, which manifests their underlying integrability. The tree-level S-matrix is written in terms of an integral over the moduli space of holomorphic maps from the Riemann sphere to twistor space, with the degree of the map corresponding to the helicity configuration of the external gravitons. For the MHV sector, the amplitude formula is derived directly from general relativity, while the others arise from ambitwistor-strings. The amplitudes exhibit novel features that are absent in Minkowski space, including back-scattering and tail effects. Our formulae have many fewer integrals than expected from space-time perturbation theory. In special cases, such as self-dual plane waves, the formulae become particularly explicit with few residual integrals. This is joint work with Tim Adamo and Atul Sharma, arxiv:2203.02238 and 2103.16984.

Talk 13: Celestial Holography for Asymptotically Flat Geometries

• Tristan McLoughlin

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 14: Gravitational Dynamics from Scattering Amplitudes

• Emil Bjerrum-Bohr

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 15: Classical gravitational scattering from a worldline quantum field theory

• Jan Plefka

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 16: From conformal symmetries and integrability to the Electron-Ion Collider

• Sven Olaf Moch

Room: G. O. Jones lecture theatre, G.O. Jones Building

Talk 17: An Antipodal Duality Between Amplitudes and Form Factors (via Zoom)

• Lance Dixon

Room: G. O. Jones lecture theatre, G.O. Jones Building

SAGEX film screening, with Introduction by Ekaterina Eremenko Room: G. O. Jones lecture theatre, G.O. Jones Building

Devendra Kapadia (Wolfram) Room: G.O.Jones Building

Jürgen Gerhard (Maplesoft) Room: G.O.Jones Building

Nicolas Meric (DreamQuark) Room: G.O.Jones Building

Susanne Milde & Sascha Rieger (Milde Marketing) Room: G.O.Jones Building

SAGEX...and beyond

• Gabriele Travaglini

Room: G. O. Jones lecture theatre, G.O. Jones Building

Supervisory Board Meeting Room: Room 6.10