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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
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Residual Local Supersymmetry and the Soft Gravitino
Steven G Avery1, Burkhard U W Schwab2
1Brown University, Department of Physics, 182 Hope Street, Providence, Rhode Island 02912, USA.
Physical Review Letters
|May 14, 2016
Summary
Researchers discovered infinite fermionic symmetries in supergravity, linking them to supersymmetry and the Bondi-Metzner-Sachs group. This work advances understanding of fundamental physics in four-dimensional spacetime.
Area of Science:
- Theoretical Physics
- Quantum Gravity
- String Theory
Background:
- Supergravity unifies gravity with other fundamental forces.
- Asymptotically flat spacetimes are crucial for understanding gravitational radiation.
- Fermionic symmetries play a key role in quantum field theories.
Purpose of the Study:
- To investigate the existence of infinite fermionic symmetries in pure d=4, N=1 supergravity.
- To explore the implications of these symmetries for supersymmetry and gravitational physics.
- To establish a connection between these symmetries and the Bondi-Metzner-Sachs (BMS) group.
Main Methods:
- Analysis of Ward identities in supergravity.
- Investigation of soft limits of gravitino fields.
- Commutation relations of symmetry charges.
Main Results:
- An infinite tower of fermionic symmetries was found in pure d=4, N=1 supergravity.
- Ward identities confirmed equivalence to soft gravitino limits and supersymmetry.
- Charges were shown to commute with BMS group charges, supersymmetrizing BMS translations.
Conclusions:
- The study reveals a rich structure of hidden symmetries in supergravity.
- This provides a deeper understanding of supersymmetry and its relation to gravitational dynamics.
- The supersymmetrization of BMS translations opens new avenues for research in quantum gravity.
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