The quantum integrability of continuous models and the computation of scattering a...
Connections between string theory and gauge theory via scattering amplitudes
|Support Opportunities:||Scholarships in Brazil - Post-Doctorate|
|Effective date (Start):||October 01, 2019|
|Effective date (End):||December 31, 2021|
|Field of knowledge:||Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields|
|Principal Investigator:||Nathan Jacob Berkovits|
|Grantee:||Diego Medrano Jiménez|
|Host Institution:||Instituto de Física Teórica (IFT). Universidade Estadual Paulista (UNESP). Campus de São Paulo. São Paulo , SP, Brazil|
|Associated research grant:||16/01343-7 - ICTP South American Institute for Fundamental Research: a regional center for theoretical physics, AP.TEM|
My research is taking place in general terms inside the field of 'Scattering Amplitudes'. In particular, I have been focusing lately on the study of gauge theories and gravity in the context of the Cachazo-He-Yuan (CHY) formalism. In this set-up, the Scattering Equations (SE) turn out to be a crucial object independently of the theory of interest, although a complete analytic description for their solutions is still missing. Therefore, it would be really useful to dig into the structure of those solutions, unveiling a possible hierarchy and correspondence to the different helicity sectors. Sudakov variables seem to be a useful parametrization for that, besides providing the formalism with a novel geometrical interpretation of the corresponding punctures. Moreover, these variables allow for a natural way to study the factorizability properties of both gauge and gravity amplitudes in Multi-Regge-Kinematics (MRK).Apart from that, I have been studying the connection between the soft behavior and asymptotic symmetries of a theory. Much progress has been made for QED and perturbative gravity in order to construct a well-defined IR-finite S-matrix, whereas non-abelian gauge theories lack a systematic way to procced for the moment. Finding the appropiate dressing states and definition of the asymptotic charges would allow to solve the problem 'a la Faddeev & Kulish'. This is something I am working on in collaboration with some colleagues at Trinity College of Dublin.As a possible continuation of my thesis, 'planar radiation zeros' are a feature of scattering amplitudes that may allow to extract information about the asymptotic behavior of a particular theory when characterized inside some projective space of the kinematic variables. Already studied in scalar-Yang-Mills and Einstein-Hilbert gravity for MHV tree-level amplitudes, it would be interesting to generalize the obtained results at loop-level and for the remaining N^(k)MHV helicity sectors.Finally, I will start working on the field of 'Scattering Amplitudes' from the point of view of 'integrability', where the S-matrix turns out to be one of the most fundamental objects in quantum integrable theories.
|News published in Agência FAPESP Newsletter about the scholarship:|
|Articles published in other media outlets (0 total):|
|More itemsLess items|
|VEICULO: TITULO (DATA)|
|VEICULO: TITULO (DATA)|