Scientific Calendar Event



Description The Workshop is livestreamed at: https://www.youtube.com/watch?v=_tEC-ToV4NM&list=PL11nn_gZTAYqbYfVKKhHtyinghGtgvJN4


An ICTP meeting in person

There are strong indications from physics at infinitesimal and cosmic distances that our current understanding of the laws of nature is only approximate. Novel geometric objects recently discovered in particle physics and cosmology have opened up entirely unexpected connections to combinatorics, algebra and geometry.
 
In the last decades researchers have uncovered tremendous insights into the structure of perturbative on-shell scattering amplitudes. This includes unitarity methods, recursion relations, worldsheet models, bootstrap methods and more recently an intriguing connection to positive geometry, which includes the positive Grassmannian, the Associahedron and the Amplituhedron. These advances bring us closer to reformulating the perturbative S-matrix via a completely new set of principles.

At the same time, positive geometry is also seen to be relevant to cosmological correlators, which are fundamental objects capturing the physics of our Universe. While some progress has been made bridging these two fields, we are still at the beginning of this road.

The workshop brings together experts from scattering amplitudes, mathematics, and cosmology to develop these novel connections.

Topics:
  • Feynman Integrals
  • Scattering Amplitudes
  • Cosmological Correlators
  • Amplituhedra
 
Speakers:
N. ARKANI-HAMED, IAS Princeton
J. J. CARRASCO, Northwestern
M. CARRILLO-GONZALEZ, Imperial College, London
H. HANNESDOTTIR, IAS Princeton
K. KAMPF, Charles University in Prague
A. LIPSTEIN, Durham University
E. PAJER, University of Cambridge
S. PARANJAPE, University of California, Davis
G. PIMENTEL, Scuola Normale Superiore, Pisa
A. PUHM, Ecole Polytechnique
S. RAJU, International Centre for Theoretical Sciences, Bengaluru
L. SENATORE, ETH Zurich

Call for Contributed Abstracts: All applicants are encouraged to submit an abstract for a poster presentation and/or a contributed talk. Abstract templates are available below for download.
 
Grants: A limited number of grants are available to support the attendance of selected participants, with priority given to participants from developing countries. There is no registration fee.

This workshop receives funding from the European Research Council (ERC)  under the European Union’s Horizon 2020 research and innovation programme (Novel structures in scattering amplitudes, grant agreement No 725110).
 
Go to day
  • Monday, 17 April 2023
    • 08:45 - 17:00
      • 08:45 Amplitudes meet Cosmology. Lecture 1: Observables in expanding universes 1h15'
        Speaker: Paolo BENINCASA (Max Planck Institute for Physics, Germany)
        Material: Video
      • 10:00 Registration formalities 1h30'
        REGISTRATION: Upon arrival, Visitors not staying in the ICTP Guest Houses, are kindly requested to complete registration formalities at the Adriatico Guesthouse - Registration Desk (Lower level) from 10:00 to 11:30.
      • 11:30 Lunch break / Welcome 2h30'
      • 14:00 From scattering to expansion, double-copy amplitudes constructions 30'
        Speaker: John Joseph CARRASCO (Northwestern University, USA)
        Material: Video
      • 14:30 The Hilbert space and holography of information in de Sitter quantum gravity 30'
        Speaker: Suvrat RAJU (ICTS, Tata Institute of Fundamental Research, India)
        Material: Slides Video
      • 15:00 Coffee break 1h0'
      • 16:00 IR effects on multi field inflation 30'
        Speaker: Sebastian Miguel CESPEDES CASTILLO (Imperial College London, UK)
        Material: Video
      • 16:30 Causality Bounds 30'
        Speaker: Mariana CARRILLO-GONZALEZ (Imperial College, UK)
        Material: Video
  • Tuesday, 18 April 2023
    • 08:45 - 17:00
      • 08:45 Amplitudes meet Cosmology. Lecture 2: Fundamental properties of processes in expanding universes 1h15'
        Speaker: Paolo BENINCASA (Max Planck Institute for Physics, Germany)
        Material: Video
      • 10:00 Coffee break 30'
      • 10:30 Differential Equations for Cosmological Correlators 30'
        Speaker: Guilherme LEITE PIMENTEL (Scuola Normale Superiore, Italy)
        Material: Video
      • 11:00 Recent Progress on the Cosmological Bootstrap 30'
        Speaker: Enrico PAJER (University of Cambridge, UK)
        Material: Abstract Slides Video
      • 11:30 Lunch break 2h30'
      • 14:00 On Classification of Effective Field Theories 30'
        Live streaming link: https://www.youtube.com/watch?v=_tEC-ToV4NM&list=PL11nn_gZTAYqbYfVKKhHtyinghGtgvJN4
        
        Speaker: Karol KAMPF (Charles University, Institute of Particle and Nuclear Physics, Czech Republic)
        Material: Slides Video
      • 14:30 Two applications of amplitude techniques to cosmology 30'
        Live streaming link: https://www.youtube.com/watch?v=_tEC-ToV4NM&list=PL11nn_gZTAYqbYfVKKhHtyinghGtgvJN4
        
        Speaker: Leonardo SENATORE (ETH Zurich, Switzerland)
        Material: Slides Video
      • 15:00 Poster Session 1h0'
      • 15:00 Coffee break 1h0'
      • 16:00 Amplitudes Cosmology 1h0'
        online
        
        Live streaming link: https://www.youtube.com/watch?v=_tEC-ToV4NM&list=PL11nn_gZTAYqbYfVKKhHtyinghGtgvJN4
        
        Speaker: Nima ARKANI-HAMED (IAS Princeton, USA)
        Material: Video
    • 17:10 - 19:00
      • 17:10 Reception 20'
        All participants are cordially invited to the Reception.
  • Wednesday, 19 April 2023
    • 08:45 - 17:00
      Live streaming link: https://www.youtube.com/watch?v=_tEC-ToV4NM&list=PL11nn_gZTAYqbYfVKKhHtyinghGtgvJN4
      
      • 08:45 Amplitudes meet Cosmology. Lecture 3: A boundary data perspective on physical processes 1h15'
        Speaker: Paolo BENINCASA (Max Planck Institute for Physics, Germany)
        Material: Video
      • 10:00 Group Photo 5'
      • 10:00 Coffee break 30'
      • 10:30 A very gentle introduction to Positive Geometry 30'
        Speaker: Giulio SALVATORI (Max-Planck Institute, Germany)
        Material: Video
      • 11:00 Infrared divergences in scattering amplitudes 30'
        Speaker: Grigori KORTCHEMSKI (Institut de Physique Theorique, CEA Saclay, France)
        Material: Video
      • 11:30 Lunch break 2h30'
      • 14:00 Discussions 1h0'
      • 15:00 Coffee break 1h0'
      • 16:00 Discussions 1h0'
  • Thursday, 20 April 2023
    • 08:45 - 17:00
      Live streaming link: https://www.youtube.com/watch?v=_tEC-ToV4NM&list=PL11nn_gZTAYqbYfVKKhHtyinghGtgvJN4
      
      • 08:45 Amplitudes meet Cosmology. Lecture 4: The geometry of physical processes (Part 1) 1h15'
        Speaker: Paolo BENINCASA (Max Planck Institute for Physics, Germany)
        Material: Video
      • 10:00 Coffee break 30'
      • 10:30 Backgrounds for celestial amplitudes 30'
        Speaker: Andrea PUHM (CPHT Ecole Polytechnique, France)
        Material: Slides Video
      • 11:00 Integrated negative geometries in ABJM 30'
        Speaker: Martin LAGARES (Universidad Nacional de La Plata Instituto de Física La Plata (IFLP), Argentina)
        Material: Video
      • 11:30 Lunch break 2h30'
      • 14:00 Crossing Between Observables 30'
        Speaker: Hofie HANNESDOTTIR (IAS, USA)
        Material: Video
      • 14:30 Supersymmetrizing Massive Gravity On-Shell 30'
        Speaker: Shruti PARANJAPE (University of California, USA)
        Material: Video
      • 15:00 Coffee break 1h0'
      • 16:00 Double Copy in (A)dS 30'
        Speaker: Arthur LIPSTEIN (Durham University, UK)
        Material: Slides Video
      • 16:30 S-matrix from Avatars of the ABHY associahedron 30'
        online
        Speaker: Alok LADDHA (Chennai Mathematical Institute, India)
        Material: Video
    • 17:10 - 19:00
      • 17:10 Welcome Reception 1h50'
        All participants are cordially invited to the Welcome Reception.
  • Friday, 21 April 2023
    • 08:45 - 17:00
      Live streaming link: https://www.youtube.com/watch?v=_tEC-ToV4NM&list=PL11nn_gZTAYqbYfVKKhHtyinghGtgvJN4
      
      • 08:45 Amplitudes meet Cosmology. Lecture 5: The geometry of physical processes (Part 2) 1h15'
        Speaker: Paolo BENINCASA (Max Planck Institute for Physics, Germany)
        Material: Video
      • 10:00 Coffee break 30'
      • 10:30 Intersection Numbers: from Electromagnetism to Quantum Field Theory 30'
        Speaker: Pierpaolo MASTROLIA (University of Padua, Italy)
        Material: Video
      • 11:00 Summary talk 30'
        Speaker: Johannes HENN (Max Planck Institute for Physics, Germany), Jaroslav TRNKA (University of California, Davis, USA)
      • 11:30 Lunch break 2h30'
      • 14:00 Discussions 3h0'