10 papers
Observing Massive Scattering from Null Infinity
Walker Melton, Kyrill Michaelsen, Romain Ruzziconi
Because massive particles asymptote to timelike rather than null infinity, current flat space holographic proposals such as celestial or Carrollian holography struggle to describe…
Quasi-Local Celestial Charges and Multipoles
Adam Kmec, Lionel Mason, Romain Ruzziconi
We extend Penrose's quasi-local mass definition to include higher-spin charges associated with the celestial symmetries and relate them to traditional definitions o…
Carrollian Physics and Holography
Romain Ruzziconi
This report reviews key developments in Carrollian physics with an emphasis on their role in the emerging framework of holography in asymptotically flat spacetimes. We begin by int…
On Carrollian and Celestial Correlators in General Dimensions
Harshal Kulkarni, Romain Ruzziconi, Akshay Yelleshpur Srikant
Carrollian holography is a framework for flat space holography, suggesting that gravity in asymptotically flat spacetime in dimensions is dual to a conformal Carrollian field t…
Towards a Flat Space Carrollian Hologram from AdS/CFT
Arthur Lipstein, Romain Ruzziconi, Akshay Yelleshpur Srikant
Finding a concrete example holography in four dimensional asymptotically flat space is an important open problem. A natural strategy is to take the flat space limit of the celebrat…
S-algebra in Gauge Theory: Twistor, Spacetime and Holographic Perspectives
Adam Kmec, Lionel Mason, Romain Ruzziconi +1
The celestial -algebra arose from a reinterpretation of collinear limits of the Yang-Mills S-matrix as OPEs in celestial holography. It was subsequently represented via asymptot…