Parton Branching TMDs with angular ordering condition and their application to Z boson pt spectrum

Apr 11, 2019, 11:45 AM
Rettorato - Aula Magna

Rettorato - Aula Magna

Via Verdi, 8 Turin
Parallel Session Talk WG1: Structure Functions and Parton Densities WG1:Structure Functions and Parton Densities


Aleksandra Anna Lelek (University of Antwerp (BE))


We study the effects of angular ordering constraint on collinear and transverse momentum dependent (TMD) parton distributions functions (PDFs) obtained within the Parton Branching (PB) method. We compare it with virtuality and pt ordering definitions. We study the effect of ordering choice on predictions for Z boson pt spectrum, especially at low pt and we demonstrate the advantage of the angular ordering. We compare the PB formalism with another existing and commonly used approaches as Kimber-Martin-Ryskin-Watt (KMRW) and Collins-Soper-Sterman (CSS). Especially, we identify the CSS Sudakov coefficients with the terms in the PB Sudakov form factor.

Primary authors

Aleksandra Anna Lelek (University of Antwerp (BE)) Hannes Jung (Deutsches Elektronen-Synchrotron (DE)) Francesco Hautmann (University of Oxford (GB)) Lissa Keersmaekers (University of Antwerp) Aron Mees van Kampen (University of Antwerp)

Presentation materials