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Volume 352 - XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2019) - Working Group 1: Structure Function and Parton Densiies
Parton Branching TMDs with angular ordering condition and their application to Z boson pt spectrum
A.A. Lelek
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Pre-published on: 2019 June 28
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Abstract
We study the effects of angular ordering constraint on 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 $p_{\bot}$ 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.
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