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arXiv · 2410.05853

Recent progress in transverse momentum dependent (TMD) Parton Densities and corresponding parton showers

S. Taheri Monfared
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Abstract

The parton branching method is crucial for Monte Carlo generators, which are essential for high-energy physics predictions. We examine the impact of soft gluons on inclusive collinear and Transverse Momentum Dependent (TMD) parton densities. By applying the Parton-Branching (PB) method, we identify the non-perturbative Sudakov form factor with the integration range $z \to 1$, which is often neglected in collinear parton shower approaches. The significance of soft gluons is demonstrated through the transverse momentum spectrum of Drell-Yan lepton pairs, resulting in an intrinsic-$k_t$ distribution width that remains independent of $\sqrt(s)$, contrary to observations in collinear parton shower approaches. This behavior is attributed to the non-perturbative Sudakov form factor.

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S. Taheri Monfared. 2024-10-08. Recent progress in transverse momentum dependent (TMD) Parton Densities and corresponding parton showers. https://arxiv.org/abs/2410.05853

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