A method to include exclusive heavy vector-meson production data at small x in global parton analyses

IF 4.2 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

The European Physical Journal C Pub Date : 2025-04-18 DOI:10.1140/epjc/s10052-025-14142-9

C. A. Flett, A. D. Martin, M. G. Ryskin, T. Teubner

引用次数: 0

Abstract

We propose a method which allows the inclusion of exclusive heavy vector-meson production data at low x in future global parton analyses. As an example we perform a study within xFitter to determine the gluon parton distribution function (PDF) at next-to-leading order (NLO) at moderate-to-low x using the measurements of exclusive \(J/\psi \) production in ep and pp collisions from HERA and LHC. We further study the constraints from the corresponding \(\Upsilon \) production process. We finish by discussing the possible effects at next-to-next-to-leading order (NNLO) through incorporation of a K factor for the exclusive heavy vector-meson coefficient function at NLO.

查看原文本刊更多论文

在全局部份分析中包含小x处排他性重矢量-介子产生数据的方法

我们提出了一种方法，允许在未来的全局部分分析中包含低x的排他性重矢量-介子产生数据。作为一个例子，我们在xFitter中进行了一项研究，通过测量HERA和LHC在ep和pp碰撞中产生的独家\(J/\psi \)，来确定中低x下的次领先阶（NLO）胶子部分分布函数（PDF）。我们从相应的\(\Upsilon \)生产过程中进一步研究约束条件。最后，我们讨论了在NNLO的排他重矢量-介子系数函数中加入K因子在NNLO上的可能影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

期刊介绍： Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.