SCET Workshop 2022

Session

NLP

21 Apr 2022, 11:00

University of Bern

Description

Power corrections

26. NLP Endpoint Factorization and Resummation for Off-Diagonal Channels

Julian Strohm

21/04/2022, 11:00

The off-diagonal partonic channels do not contribute at leading power in hard scattering but appear first at next-to-leading power (NLP). In contrast to the diagonal channels, leading logarithms are already non-trivial and resummation requires new, refined methods. Techniques developed at leading power cannot be readily utilized since endpoint divergences spoil NLP factorization. In four...

24. Finite-t and Mass Corrections in Deeply Virtual Compton Scattering

Yao Ji

21/04/2022, 11:30

In this talk, I will present our calculation of kinematic power corrections $t/Q^2$ and $m^2/Q^2$ to the amplitude of deeply-virtual Compton scattering to the twist-six accuracy.

Phenomenologically, this result reduces an important source of uncertainties in the QCD predictions for intermediate momentum transfers $Q^2\sim 1-10{\mathrm{G}\mathrm{e}\mathrm{V}}^2$, which are accessible in the existing and planned...

16. Resummmation Beyond Next-to-leading Logarithms at Subleading Power in $h\to \gamma \gamma$ Decay

Xing Wang

21/04/2022, 12:00

Based on our previous series of work, we present the full resummation at RG-improved leading order for $h\to \gamma \gamma$ decay amplitudes induced by light quarks. We analytically show that endpoint divergences cancel in the plus-type subtraction scheme after scale evolution and use a slicing method to do the numerical evaluation. We find logarithms beyond NLL are significant.