DIS2022: XXIX International Workshop on Deep-Inelastic Scattering and Related Subjects

Azimuthal Decorrelation in Z+jet events at the LHC

Not scheduled

20m

Posters WG4: QCD with Heavy Flavours and Hadronic Final States Poster session and Reception

Speaker

Yazid Delenda (University of Batna 1)

Description

We consider the resummation of large logarithms in the distribution of the azimuthal angle between a Z boson and a jet produced in hadron-hadron collisions. The recombination shceme used in the reconstruction of the jets has a strong impact on the NLL resummation. Specifically when using the E-scheme (four-momentum addition of constituents of the jet), the resummation is highly non-trivial due to the presence of non-global and clustering logarithms. We compute these logarithms at two loops as a function of the jet radius and provide an estimate of the all-orders NLL resummed distribution for this observable. By including fixed-order corrections from Monte Carlo calculations we extend the accuracy of our distribution to NNLL in its fixed-order expansion. We compare our predictions with Monte Carlo parton showers and with experimental data from the CMS collaboration.