Conveners
Amplitudes for black holes
- Alexander Ochirov
Amplitudes for black holes
- Jiang-Hao Yu
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Prof. Zhengwen Liu (Southeast University)27/04/2025, 14:00
High-precision theoretical predictions for the motion of compact binary systems are essential for maximizing the discovery potential of current and next-generation gravitational-wave observations, such as LIGO-Virgo-Kagra, Taiji, TianQin, and the Einstein Telescope. The Effective Field Theory (EFT) methodology, integrated with state-of-the-art multi-loop computational techniques, has proven...
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Prof. Fei Teng (Fudan U)27/04/2025, 14:30
In conventional world-line formalism for spinning binaries in general relativity, one assumes that the dynamical degrees of freedom for spin are the completely captured by the rest frame canonical spin. A spin supplementary condition (SSC) is then necessary to remove redundancies. We study this problem from an amplitude-based field theory perspective. In higher spin field theories, it is...
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Prof. Katsuki Aoki (Yukawa Institute, Japan)28/04/2025, 14:00
We develop an on-shell approach to study black hole mergers. Since, asymptotically, the initial and final states can be described by point-like spinning particles, we propose a massive three-point amplitude for the merger of two Schwarzschild black holes into a Kerr black hole. This three-point amplitude and the spectral function of the final state are fully determined by kinematics and the...
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Prof. Alexander Ochirov (ShanghaiTech)28/04/2025, 14:30
Quantum field theory of higher-spin particles is a formidable subject,
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where preserving the physical number of degrees of freedom in the
Lorentz-invariant way requires a host of auxiliary fields. They can be
chosen to have a rich gauge-symmetry structure, but introducing
consistent interactions in such approaches is still a non-trivial task,
with massive higher-spin Lagrangians...