Toward NNLL threshold resummation for hadron pair production in hadronic collisions

被引：16

作者：

Hinderer, Patriz ^{[1
]}

Ringer, Felix ^{[1
]}

Sterman, George F. ^{[2
]}

Vogelsang, Werner ^{[1
]}

机构：

[1] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany

[2] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA

来源：

PHYSICAL REVIEW D | 2015年 / 91卷 / 01期

基金：

美国国家科学基金会;

关键词：

QCD; AMPLITUDES; LOOP; ANNIHILATION; SCATTERING; MASS;

D O I：

10.1103/PhysRevD.91.014016

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate QCD threshold resummation effects beyond the next-to-leading logarithmic (NLL) order for the process H1H2 -> h(1)h(2)X at high invariant mass of the produced hadron pair. We take into account the color structure of the underlying partonic hard-scattering cross sections and determine the relevant hard and soft matrices in color space that contribute to the resummed cross section at next-to-next-to-leading logarithmic (NNLL) accuracy. We present numerical results for fixed-target and collider regimes. We find a significant improvement compared to previous results at NLL accuracy. In particular, the scale dependence of the resummed cross section is greatly reduced. Use of the most recent set of fragmentation functions also helps in improving the comparison with the experimental data. Our calculation provides a step towards a systematic NNLL extension of threshold resummation also for other hadronic processes, in particular for jet production.

引用

页数：21

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