New twisted strings

by Piotr Tourkine (CERN)

Monday 22 Jan 2018, 14:00 → 15:30 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

Twistor strings have undergone a renewal of interest since the discovery of the Cachazo-He-Yuan formalism for scattering amplitude in field theory in 2013. These formulae deeply challenge the way we think about scattering amplitudes in quantum field theory and are neatly explained by the so-called ambitwistor string, a cousin of the old twistor string.

The existence of these remarkable formalisms, which I shall present to you during the talk, cried for a connection to good old string theory. We know have the answer to this question, which beautifully relies on counter-intuitive limits and crucially, the existence of a different quantization for string theory, which describe what we called “twisted strings”.

If time allows I’ll mention briefly some recent results that we obtained with Eduardo Casali on winding modes of these twisted strings.

The presentation is going to be based on the work of several groups (see refs. below) and will be non-techincal.

[arXiv:1512.02569]
Amplitudes for left-handed strings
W. Siegel

[arXiv:1603.02588]  JHEP 1609 (2016) 101 Factorization of Chiral String Amplitudes Y. Huang, W. Siegel, E. Y. Yuan

[arXiv:1606.05636]  JHEP 1611 (2016) 036 On the null origin of the ambitwistor string E. Casali, P. Tourkine

[arXiv:1708.05707]  JHEP 1711 (2017) 172 A string theory which isn’t about strings K. Lee, S. Rey, J. Rosabal

[arXiv:1710.01241]
Winding modes of tensionful ambitwistor strings E. Casali, P. Tourkine