NNLO QCD calculation of hadron multiplicities in light-quark jets at lepton colliders

IF 5.3 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-10-15 DOI:10.1103/tjy3-tdxv

Bin Zhou, Jun Gao

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引用次数: 0

Abstract

We present the calculation of next-to-next-to-leading-order (NNLO) QCD corrections to hadron multiplicities in light-quark jets at lepton colliders, employing the “projection-to-Born” (P2B) method implemented in the FMNLO program. Taking the next-to-leading-order result as an example, we rigorously establish the validity of our P2B-based calculation. We then present NNLO predictions for the normalized asymmetry DK− between hadron and antihadron production in light-quark jets and compare them with SLD data. We find that a suppression of these SLD measurements relative to NPC23 predictions for DK− emerges in the intermediate zh domain (0.2≲zh≲0.7). We expect that incorporating these SLD data into global QCD fits will enable improved determination of fragmentation functions.

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轻子对撞机轻夸克喷流中强子多重度的NNLO QCD计算

我们提出了在轻子对撞机中，使用FMNLO计划中实现的“投影到诞生”（P2B）方法，计算了对撞机中轻夸克喷流中强子多重度的次至次至前序（NNLO） QCD修正。以次领先的结果为例，严格验证了基于p2b的计算的有效性。然后，我们提出了轻夸克喷流中强子和反强子产生的归一化不对称DK−的NNLO预测，并将其与SLD数据进行了比较。我们发现，相对于NPC23对DK−的预测，这些SLD测量值在中间zh域（0.2 > zh > 0.7）出现了抑制。我们期望将这些SLD数据整合到全局QCD拟合中，将能够改进碎片函数的确定。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.