Parton distributions with threshold resummation

被引：54

作者：

Bonvini, Marco ^{[1
]}

Marzani, Simone ^{[2
]}

Rojo, Juan ^{[1
]}

Rottoli, Luca ^{[1
]}

Ubiali, Maria ^{[3
]}

Ball, Richard D. ^{[4
,5
]}

Bertone, Valerio ^{[5
]}

Carrazza, Stefano ^{[6
,7
]}

Hartland, Nathan P. ^{[1
]}

机构：

[1] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England

[2] MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA

[3] Univ Cambridge, Cavendish Lab, HEP Grp, Cambridge CB3 0HE, England

[4] Univ Edinburgh, Higgs Ctr Theoret Phys, JCMB, KB, Edinburgh EH9 3JZ, Midlothian, Scotland

[5] CERN, PH Dept, TH Unit, CH-1211 Geneva 23, Switzerland

[6] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy

[7] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2015年 / 09期

基金：

欧洲研究理事会; 美国国家科学基金会;

关键词：

Resummation; QCD; Deep Inelastic Scattering; DEUTERON STRUCTURE FUNCTIONS; DEEP-INELASTIC-SCATTERING; HIGH STATISTICS MEASUREMENT; 3-LOOP SPLITTING FUNCTIONS; FREE GAUGE-THEORIES; HADRON COLLIDERS; DRELL-YAN; PAIR PRODUCTION; CROSS-SECTIONS; ANOMALOUS DIMENSIONS;

D O I：

10.1007/JHEP09(2015)191

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We construct a set of parton distribution functions (PDFs) in which fixed-order NLO and NNLO calculations are supplemented with soft-gluon (threshold) resummation up to NLL and NNLL accuracy respectively, suitable for use in conjunction with any QCD calculation in which threshold resummation is included at the level of partonic cross sections. These resummed PDF sets, based on the NNPDF3.0 analysis, are extracted from deep-inelastic scattering, Drell-Yan, and top quark pair production data, for which resummed calculations can be consistently used. We find that, close to threshold, the inclusion of resummed PDFs can partially compensate the enhancement in resummed matrix elements, leading to resummed hadronic cross-sections closer to the fixed-order calculations. On the other hand, far from threshold, resummed PDFs reduce to their fixed-order counterparts. Our results demonstrate the need for a consistent use of resummed PDFs in resummed calculations.

引用

页码：1 / 45

页数：45

共 191 条

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