Impact of low-x resummation on QCD analysis of HERA data

被引：71

作者：

Abdolmaleki, Hamed ^{[1
]}

Bertone, Valerio ^{[2
,3
]}

Britzger, Daniel ^{[4
]}

Camarda, Stefano ^{[5
]}

Cooper-Sarkar, Amanda ^{[6
]}

Giuli, Francesco ^{[6
]}

Glazov, Alexander ^{[7
]}

Kusina, Aleksander ^{[8
]}

Luszczak, Agnieszka ^{[7
,9
]}

Olness, Fred ^{[10
]}

Sapronov, Andrey ^{[11
]}

Shvydkin, Pavel ^{[11
]}

Wichmann, Katarzyna ^{[7
]}

Zenaiev, Oleksandr ^{[7
]}

Bonvini, Marco ^{[12
]}

机构：

[1] Semnan Univ, Fac Phys, Semnan 3513119111, Iran

[2] Vrije Univ Amsterdam, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands

[3] NIKHEF Theory Grp, Sci Pk 105, NL-1098 XG Amsterdam, Netherlands

[4] Heidelberg Univ, Phys Inst, Neuenheimer Feld 226, D-69120 Heidelberg, Germany

[5] CERN, CH-1211 Geneva 23, Switzerland

[6] Univ Oxford, Particle Phys, Denys Wilkinson Bdg,Keble Rd, Oxford OX1 3RH, England

[7] Deutsch Elektronen Synchrotron DESY, Notkestr 85, D-22607 Hamburg, Germany

[8] Polish Acad Sci, Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland

[9] T Kosciuszko Cracow Univ Technol, PL-30067 Krakow, Poland

[10] SMU Phys, Box 0175, Dallas, TX 75275 USA

[11] JINR, Joliot Curie 6, Dubna 141980, Moscow Region, Russia

[12] INFN, Sez Roma 1, Piazzale Aldo Moro 5, I-00185 Rome, Italy

来源：

EUROPEAN PHYSICAL JOURNAL C | 2018年 / 78卷 / 08期

基金：

欧洲研究理事会;

关键词：

CROSS-SECTIONS; EVOLUTION; QUARKS;

D O I：

10.1140/epjc/s10052-018-6090-8

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：

Fits to the final combined HERA deep-inelastic scattering cross-section datawithin the conventionalDGLAP framework of QCD have shown some tension at low x and low Q(2). A resolution of this tension incorporating ln(1/x)-resummation terms into the HERAPDF fits is investigated using the xFitter program. The kinematic region where this resummation is important is delineated. Such high-energy resummation not only gives a better description of the data, particularly of the longitudinal structure function FL, it also results in a gluon PDF which is steeply rising at low x for low scales, Q(2) similar or equal to 2.5GeV(2), contrary to the fixed-order NLO and NNLO gluon PDF.

引用

页数：14

共 48 条

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