Flavoured jets and particles at the LHC

by Giovanni Stagnitto (University of Zurich)

Monday 16 Jan 2023, 11:30 → 12:30 Europe/Zurich

Aula Caldirola (Università degli Studi di Milano)

At the Large Hadron Collider (LHC) at CERN, identifying heavy hadrons from bottom or charm fragmentation is critical to pinpoint specific scattering processes and reject backgrounds; such signatures are crucial for precision phenomenology, PDF determination and search for new physics. Measurements of processes involving hadrons are usually differential in the momentum of the identified particle, requiring the introduction of a (non-)perturbative fragmentation function, or they rely on flavoured jets, which are jets consistent with being initiated by a heavy-flavour quark. After a general introduction, I will discuss how to account for the presence of an identified particle in the antenna subtraction formalism for next-to-next-to-leading order (NNLO) QCD calculations. I will then move to flavoured jets, by presenting a new approach, the flavour dressing algorithm, which allows for an infrared and collinear safe way of assigning flavour to any jet. Finally, I will present results for NNLO QCD predictions for Z+c-jet production in the forward kinematics.

stagnitto_160123.pdf