Twistor Workshop
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Fri, 21/05/2010 12:00 |
Tim Adamo (Oxford) |
Twistor Workshop  |
Gibson 1st Floor SR |
| Abstract: We will review Kreimer's construction of a Hopf algebra for Feynman graphs, and explore several aspects of this structure including its relationship with renormalization and the (trivial) Hochschild cohomology of the algebra. Although Kreimer's construction is heavily tied with the language of renormalization, we show that it leads naturally to recursion relations resembling the BCFW relations, which can be expressed using twistors in the case of N=4 super-Yang-Mills (where there are no ultra-violet divergences). This could suggest that a similar Hopf algebra structure underlies the supersymmetric recursion relations... | |||
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Fri, 28/05/2010 12:00 |
Lionel Mason (Oxford) |
Twistor Workshop |
Gibson 1st Floor SR |
| This will be a review of recent work that obtains amplitudes at strong coupling from certain minimal surfaces in AdS. | |||
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Fri, 04/06/2010 11:30 |
Ron Reid-Edwards (Oxford) |
Twistor Workshop |
Gibson 1st Floor SR |
| This will discuss the paper of Ricci, Tseytlin & Wolf from 2007. | |||
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Fri, 11/06/2010 12:00 |
Mat Bullimore (Oxford) |
Twistor Workshop |
SR1 |
| This talk will follow the paper 0911.4708. | |||
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Fri, 18/06/2010 12:00 |
Ron Reid-Edwards (Oxford) |
Twistor Workshop |
L3 |
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This talk will be based on the article arXiv:1006.2788. |
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