Speaker
Felix Driencourt-Mangin
(IFIC)
Description
We present a new method to compute higher-order corrections to physical cross-sections, at Next-to-Leading Order and beyond. This method, based on the Loop Tree Duality, leads to locally integrable expressions in four dimensions. By introducing a physically motivated momentum mapping between the momenta involved in the real and the virtual contributions, infrared singularities naturally disappear at integrand level, without the need to introduce subtraction counter-terms. Ultraviolet singularities are dealt with using dual representations of suitable counter-terms, with some subtleties regarding the self-energy contributions. We first apply this method to a $1\to2$ scalar process, and then compute the decay rate for $H\to q\overline{q}$, $\gamma\to q\overline{q}$ and $Z\to q\overline{q}$.
Authors
Felix Driencourt-Mangin
(IFIC)
German Rodrigo
(IFIC Valencia)
