10–13 Oct 2023
University of Tarapaca, Arica, Chile
America/Santiago timezone

Intrinsic $k_T$ Distribution Independence in Drell-Yan Spectra Predictions: A Novel Insight from the Parton-Branching Method

12 Oct 2023, 12:20
20m
Room 102 (Room 102)

Room 102

Room 102

Oral presentation High Energy Particle Physics Parallel Session 3

Speaker

Sara Taheri Monfared (Deutsches Elektronen-Synchrotron (DE))

Description

The Parton-Branching method (PB) is a powerful tool for determining Transverse Momentum Dependent (TMD) parton densities across a wide range of transverse momentum ($k_T$). It provides insights into both intrinsic parton motion and the contribution of soft gluons, particularly in the small $k_T$ range. Our research emphasizes the significance of soft gluons operating below a resolvable scale in shaping integrated and TMD parton densities.

To make predictions for Drell-Yan transverse momentum spectra across a diverse mass spectrum, we employ PB TMD parton densities in conjunction with NLO calculations following the MC@NLO style. By introducing a free parameter, we extract the intrinsic $k_T$ width by comparing experimental data with predictions based on the PB-NLO-HERAI+II-2018 set2 TMD framework. Notably, unlike alternative methods, our approach reveals that the intrinsic $k_T$ distribution width remains unaffected by the mass of the Drell-Yan pair and the center-of-mass energy ($\sqrt s$).

Details

Sara Taheri Monfared, Dr., DESY, Germany, https://www.desy.de/

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Author

Sara Taheri Monfared (Deutsches Elektronen-Synchrotron (DE))

Co-author

Hannes Jung (Deutsches Elektronen-Synchrotron (DE))

Presentation materials