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| (Seminar) Understanding conformal gravity amplitudes |
| 2018-08-01
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CAS Key Laboratory of Theoretical Physics |
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Institute of Theoretical Physics |
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Chinese Academy of Sciences |
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Seminar |
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Title
题目 |
Understanding conformal gravity amplitudes |
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Speaker
报告人 |
Fei Teng |
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Affiliation
所在单位 |
Uppsala University |
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Date
日期 |
2018年8月1日 14:00 |
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Venue
地点 |
Conference Room 6420, ITP new building |
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Abstract
摘要 |
Quantum field theories with four-derivative kinematic terms have ghostlike non-planewave states, in addition to usual physical planewave states. They are non-unitary, but often have better ultraviolet behavior, which might provide an ultraviolet completion of two-derivative theories. Examples of four-derivative theories include conformal gravity, (DF)^2 theory, etc. In this talk, I will start with factorization property of general four-derivative theories using the technique of mass deformation, which trades non-planewave states into massive planewaves. Then I will classify minimal versus non-minimal four-derivative theories, and discuss general features of the amplitudes. With the above knowledge in mind, I will use SU(1,1)/U(1) coset formalism to construct minimal conformal gravity Lagrangian, and most importantly, identify the non-minimal Lagrangian that produces the Berkovits-Witten amplitudes. |
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Contact person
所内联系人 |
Song He |
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