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| (Seminar) The Infrared Structures of Scalar Effective Field Theories |
| 2018-09-05
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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 |
The Infrared Structures of Scalar Effective Field Theories |
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Speaker
报告人 |
Zhewei Yin |
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Affiliation
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Date
日期 |
2:30pm, Sep 5, 2018, Wednesday |
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Venue
地点 |
Conference Room 6420, ITP new building |
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Abstract
摘要 |
There is a rich history of research on effective field theories (EFTs) of scalar fields, and recent development shows that several such theories can be entirely fixed by minimal assumptions including the soft behavior of the amplitudes. By treating the soft behavior as a consequence of the Ward identity of the shift symmetry, we are able to realize this "soft bootstrap" idea by constructing the Lagrangian of the nonlinear sigma model. This approach enables us to study new soft theorems of scalar EFTs, and take a step further toward understanding the underlying structures of the mysterious "extended theories" first discovered in the amplitude program. |
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Contact person
所内联系人 |
Song He |
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