Resummation of double collinear logs in BK evolution versus HERA data

被引：29

作者：

Albacete, Javier L. ^{[1
,2
]}

机构：

[1] Univ Granada, CAFPE, 18071 Campus Fuentenueva, Granada, Spain

[2] Univ Granada, Dept Fis Teor & Cosmos, 18071 Campus Fuentenueva, Granada, Spain

来源：

NUCLEAR PHYSICS A | 2017年 / 957卷

关键词：

Deep inelastic scattering; Small-x non-linear evolution; Saturation physics; HERA data; SMALL-X EVOLUTION; QCD EVOLUTION; SATURATION; SCATTERING; EQUATION; LHC;

D O I：

10.1016/j.nuclphysa.2016.07.008

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We present a global fit to HERA data on the reduced cross section measured in electron proton collisions in the region of small Bjorken-x: x <= x(0) = 10(-2) and moderate to high values of the virtuality Q(2) < Q(max)(2) = 650 GeV2. The main dynamical ingredients in the fits are two recently proposed improved BK equations for the description of the small-x evolution of the dipole scattering amplitude [1,2]. These two new equations provide an all-order resummation of double collinear logarithms that arise beyond leading logarithmic accuracy. We show that a very good description of data is possible in both cases, provided the parent dipole or smallest dipole prescriptions are employed for the running of the coupling. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：71 / 84

页数：14

共 40 条

[1] Combined measurement and QCD analysis of the inclusive e±p scattering cross sections at HERA [J].

Aaron, F. D. ;

Abramowicz, H. ;

Abt, I. ;

Adamczyk, L. ;

Adamus, M. ;

Al-daya Martin, M. ;

Alexa, C. ;

Andreev, V. ;

Antonelli, S. ;

Antonioli, P. ;

Antonov, A. ;

Antunovic, B. ;

Arneodo, M. ;

Aushev, V. ;

Bachynska, O. ;

Backovic, S. ;

Baghdasaryan, A. ;

Bamberger, A. ;

Barakbaev, A. N. ;

Barbagli, G. ;

Bari, G. ;

Barreiro, F. ;

Barrelet, E. ;

Bartel, W. ;

Bartsch, D. ;

Basile, M. ;

Begzsuren, K. ;

Behnke, O. ;

Behr, J. ;

Behrens, U. ;

Bellagamba, L. ;

Belousov, A. ;

Bertolin, A. ;

Bhadra, S. ;

Bindi, M. ;

Bizot, J. C. ;

Blohm, C. ;

Bold, T. ;

Boos, E. G. ;

Borodin, M. ;

Borras, K. ;

Boscherini, D. ;

Bot, D. ;

Boudry, V. ;

Boutle, S. K. ;

Bozovic-Jelisavcic, I. ;

Bracinik, J. ;

Brandt, G. ;

Brinkmann, M. ;

Brisson, V. .

JOURNAL OF HIGH ENERGY PHYSICS, 2010, (01)

[2] Gluon saturation and initial conditions for relativistic heavy ion collisions [J].

Albacete, J. L. ;

Marquet, C. .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, 2014, 76 :1-42

[3] Linear vs. non-linear QCD evolution: from HERA data to LHC phenomenology [J].

Albacete, J. L. ;

Milhano, J. G. ;

Quiroga-Arias, P. ;

Rojo, J. .

EUROPEAN PHYSICAL JOURNAL C, 2012, 72 (09) :1-13

[4]

Albacete J. L., ARXIV150506583HEPPH

[5] Solving the high energy evolution equation including running coupling corrections [J].

Albacete, Javier L. ;

Kovchegov, Yuri V. .

PHYSICAL REVIEW D, 2007, 75 (12)

[6] CGC predictions for p plus Pb collisions at the LHC [J].

Albacete, Javier L. ;

Dumitru, Adrian ;

Fujii, Hirotsugu ;

Nara, Yasushi .

NUCLEAR PHYSICS A, 2013, 897 :1-27

[7] AAMQS: A non-linear QCD analysis of new HERA data at small-x including heavy quarks [J].

Albacete, Javier L. ;

Armesto, Nestor ;

Guilherme Milhano, Jose ;

Arias, Paloma Quiroga ;

Salgado, Carlos A. .

EUROPEAN PHYSICAL JOURNAL C, 2011, 71 (07) :1-11

[8] Nonlinear QCD meets data: A global analysis of lepton-proton scattering with running coupling Balitsky-Kovchegov evolution [J].

Albacete, Javier L. ;

Armesto, Nestor ;

Milhano, Jose Guilherme ;

Salgado, Carlos A. .

PHYSICAL REVIEW D, 2009, 80 (03)

[9] Numerical analysis of the Balitsky-Kovchegov equation with running coupling: Dependence of the saturation scale on nuclear size and rapidity [J].

Albacete, JL ;

Armesto, N ;

Milhano, JG ;

Salgado, CA ;

Wiedemann, UA .

PHYSICAL REVIEW D, 2005, 71 (01) :014003-1

[10] Single inclusive particle production in proton-nucleus collisions at next-to-leading order in the hybrid formalism [J].

Altinoluk, Tolga ;

Armesto, Nestor ;

Beuf, Guillaume ;

Kovner, Alex ;

Lublinsky, Michael .

PHYSICAL REVIEW D, 2015, 91 (09)

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