10–13 Sept 2024
Europe/Rome timezone

Heavy quarks’ mass corrections to threshold resummation

10 Sept 2024, 15:45
25m
Room C1

Room C1

Resummation, Parton Showers and Monte-Carlo Resummation, Parton Showers and Monte-Carlo

Speaker

Andrea Ghira (Università di Genova and Istituto Nazionale di Fisica Nucleare (INFN) sezione di Genova)

Description

Perturbative calculations for processes that involve heavy flavours can be performed in two approaches: the massive scheme and the massless one. The former enables one to fully account for the heavy-quark kinematics, while the latter allows one to resum potentially-large mass logarithms. Furthermore, the two schemes can be combined to take advantage of the virtues of each of them. Both massive and massless calculations can be supplemented by soft-gluon resummation. However matching between massive and massless resummed calculations is difficult, essentially because of the non-commutativity of the soft and massless limits. In this talk, I will present a formalism to combine massive and massless resummed calculations. Our result consists of an all-order expression that consistently resums both mass and soft logarithms to next-to-leading logarithmic accuracy. Finally, I will comment on the phenomenological impact of these findings, presenting a comparison between our calculations and experimental data for heavy flavour fragmentation.

Primary authors

Andrea Ghira (Università di Genova and Istituto Nazionale di Fisica Nucleare (INFN) sezione di Genova) Giovanni Ridolfi (Istituto Nazionale di Fisica Nucleare) Matteo Cacciari (LPTHE Paris) Simone Marzani (Istituto Nazionale di Fisica Nucleare)

Presentation materials