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Center-of-mass energy dependence of intrinsic-$k_T$ distributions obtained from Drell-Yan production

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arxiv 2404.04088 v3 pith:4OHBGHHS submitted 2024-04-05 hep-ph hep-ex

I. Bubanja , H. Jung , A. Lelek , N. Raicevic , S. Taheri Monfared This is my paper · ORCID
classification hep-phhep-ex
keywords momentumpartontransversedependencedistributionsintrinsic-sqrtcenter-of-mass
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

The internal motion of partons inside hadrons has been studied through its impact on very low transverse momentum spectra of Drell-Yan (DY) pairs created in hadron-hadron collisions. We study DY production at next-to-leading order using the Parton Branching (PB) method which describes the evolution of transverse momentum dependent parton distributions. The main focus is on studying the intrinsic transverse momentum distribution (intrinsic-$k_T$) as a function of the center-of-mass energy $\sqrt s$. While collinear parton shower Monte Carlo event generators require intrinsic transverse momentum distributions strongly dependent on $\sqrt s$, this is not the case for the PB method. We perform a detailed study of the impact of soft parton emissions. We show that by requiring a minimal transverse momentum, $q_0$, of a radiated parton, a dependence of the width of the intrinsic-$k_T$ distribution as a function of $\sqrt{s}$ is observed. This dependence becomes stronger with increasing $q_0$.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Coarse-grained binning in Drell-Yan transverse momentum spectra

    hep-ph 2024-12 conditional novelty 6.0 of 10

    A coarse two-bin ratio of Drell-Yan transverse momentum cross sections can determine the intrinsic kT width with sensitivity comparable to fine binned spectra, as shown by pseudo-data and CMS data.

  2. Non-perturbative effects and soft-gluon dynamics in low-$p_T$ Drell-Yan production

    hep-ph 2026-02 conditional novelty 5.0 of 10

    With a remnant-only recoil scheme, the PDF2ISR shower reproduces PB-TMD Drell-Yan predictions and data from sqrt(s)=38.8 GeV to 13 TeV using one energy-independent intrinsic-kT width (q_s=1.04 GeV); low-pT spectra exp...

  3. Non-Perturbative Contributions to Low Transverse Momentum Drell-Yan Pair Production Using the Parton Branching Method

    hep-ph 2024-12 conditional novelty 5.0 of 10

    The fitted intrinsic-kT width obtained from CASCADE3 Drell-Yan simulations is independent of the pair invariant mass at LHC energies, consistent with the slow scale dependence of the non-perturbative Sudakov form fact...

  4. Interplay of intrinsic motion of partons and soft gluon emissions in Drell-Yan production studied with PYTHIA

    hep-ph 2024-12 conditional novelty 4.0 of 10

    The sqrt(s)-dependent intrinsic-kT width in PYTHIA 8 is traced to soft gluon emissions controlled by the ISR cutoff pT0Ref, with the fitted width increasing nearly linearly with pT0Ref.

  5. What can we learn from the Parton Branching method in QCD?

    hep-ph 2024-12 conditional novelty 3.0 of 10

    A proceedings review that highlights recent PB method results: NNLL Sudakov accuracy, a PB-CSS correspondence, and a fully consistent forward-backward shower called Pdf2Isr.

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