Particle multiplicities in the central region of high-energy collisions from $k_T$-factorization with running coupling corrections

Dumitru, Adrian; Giannini, Andre V.; Luzum, Matthew; Nara, Yasushi

doi:10.1016/j.physletb.2018.08.028

Title: Particle multiplicities in the central region of high-energy collisions from $$k_T$$-factorization with running coupling corrections

Journal Article · Thu Aug 23 00:00:00 EDT 2018 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2018.08.028· OSTI ID:1466057

Dumitru, Adrian;

;

Horowitz and Kovchegov have derived a $$k_T$$-factorization formula for particle production at small x which includes running coupling corrections. We perform a first numerical analysis to confront the theory with data on the energy and centrality dependence of particle multiplicities at midrapidity in high-energy p+A (and A+A) collisions. Moreover, we point out a strikingly different dependence of the multiplicity per participant on $$N$$_part in p+Pb vs. Pb+Pb collisions at LHC energies, and argue that the observed behavior follows rather naturally from the convolution of the gluon distributions of an asymmetric vs. symmetric projectile and target.

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Research Organization:: City Univ. of New York (CUNY), NY (United States). Baruch College

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); Fundação de Amparo a Pesquisa do Estado de São Paulo (FAPESP)

Grant/Contract Number:: FG02-09ER41620; SC0002307; 60262-0048; 17/14974-8

OSTI ID:: 1466057

Alternate ID(s):: OSTI ID: 1660450

Journal Information:: Physics Letters. B, Journal Name: Physics Letters. B Vol. 784 Journal Issue: C; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: Netherlands

Language:: English

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Cited by: 6 works

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References (34)

Collinear singularities and running coupling corrections to gluon production in CGC Kovchegov, Yuri V.; Weigert, Heribert Nuclear Physics A, Vol. 807, Issue 3-4 https://doi.org/10.1016/j.nuclphysa.2008.04.008	journal	July 2008
Quark contribution to the small- $x$ evolution of color dipole Balitsky, Ian Physical Review D, Vol. 75, Issue 1 https://doi.org/10.1103/PhysRevD.75.014001	journal	January 2007
Running coupling and power corrections in non-linear evolution at the high-energy limit Gardi, Einan; Kuokkanen, Janne; Rummukainen, Kari Nuclear Physics A, Vol. 784, Issue 1-4 https://doi.org/10.1016/j.nuclphysa.2006.12.004	journal	March 2007
Scaling of transverse energies and multiplicities with atomic number and energy in ultrarelativistic nuclear collisions Eskola, K. J.; Kajantie, K.; Ruuskanen, P. V. Nuclear Physics B, Vol. 570, Issue 1-2 https://doi.org/10.1016/S0550-3213(99)00720-8	journal	March 2000
Running coupling corrections to high energy inclusive gluon production Horowitz, W. A.; Kovchegov, Yuri V. Nuclear Physics A, Vol. 849, Issue 1 https://doi.org/10.1016/j.nuclphysa.2010.10.014	journal	January 2011
Nonlinear QCD meets data: A global analysis of lepton-proton scattering with running coupling Balitsky-Kovchegov evolution Albacete, Javier L.; Armesto, Néstor; Milhano, José Guilherme Physical Review D, Vol. 80, Issue 3 https://doi.org/10.1103/PhysRevD.80.034031	journal	August 2009
Transverse energy evolution as a test of parton cascade models Gyulassy, Miklos; Pang, Yang; Zhang, Bin Nuclear Physics A, Vol. 626, Issue 4 https://doi.org/10.1016/S0375-9474(97)00604-0	journal	December 1997
Color glass condensate at the LHC: hadron multiplicities in pp, pA and AA collisions Kharzeev, Dmitri; Levin, Eugene; Nardi, Marzia Nuclear Physics A, Vol. 747, Issue 2-4 https://doi.org/10.1016/j.nuclphysa.2004.10.018	journal	January 2005
Saturation models of HERA DIS data and inclusive hadron distributions in collisions at the LHC Tribedy, Prithwish; Venugopalan, Raju Nuclear Physics A, Vol. 850, Issue 1 https://doi.org/10.1016/j.nuclphysa.2010.12.006	journal	January 2011
Semihard processes in QCD Gribov, L. Physics Reports, Vol. 100, Issue 1-2 https://doi.org/10.1016/0370-1573(83)90022-4	journal	November 1983
On the gluon spectrum in the glasma Blaizot, J. -P.; Lappi, T.; Mehtar-Tani, Y. Nuclear Physics A, Vol. 846, Issue 1-4 https://doi.org/10.1016/j.nuclphysa.2010.06.009	journal	November 2010
Triumvirate of running couplings in small-x evolution Kovchegov, Yuri V.; Weigert, Heribert Nuclear Physics A, Vol. 784, Issue 1-4 https://doi.org/10.1016/j.nuclphysa.2006.10.075	journal	March 2007
Average transverse momentum of hadrons in proton–nucleus collisions in the wounded nucleon model Bzdak, Adam; Skokov, Vladimir Physics Letters B, Vol. 726, Issue 1-3 https://doi.org/10.1016/j.physletb.2013.08.021	journal	October 2013
Parton saturation at small x and in large nuclei Mueller, A. H. Nuclear Physics B, Vol. 558, Issue 1-2 https://doi.org/10.1016/S0550-3213(99)00394-6	journal	October 1999
Hadron production in nuclear collisions at RHIC and high-density QCD Kharzeev, Dmitri; Nardi, Marzia Physics Letters B, Vol. 507, Issue 1-4 https://doi.org/10.1016/S0370-2693(01)00457-9	journal	May 2001
Charged particle densities from Au+Au collisions at sNN=130 GeV Bearden, I. G.; Beavis, D.; Besliu, C. Physics Letters B, Vol. 523, Issue 3-4 https://doi.org/10.1016/S0370-2693(01)01333-8	journal	December 2001
CGC predictions for p+Pb collisions at the LHC Albacete, Javier L.; Dumitru, Adrian; Fujii, Hirotsugu Nuclear Physics A, Vol. 897 https://doi.org/10.1016/j.nuclphysa.2012.09.012	journal	January 2013
Next-to-leading order evolution of color dipoles Balitsky, Ian; Chirilli, Giovanni A. Physical Review D, Vol. 77, Issue 1 https://doi.org/10.1103/PhysRevD.77.014019	journal	January 2008
The small-x gluon distribution in centrality biased pA and pp collisions Dumitru, Adrian; Kapilevich, Gary; Skokov, Vladimir Nuclear Physics A, Vol. 974 https://doi.org/10.1016/j.nuclphysa.2018.03.012	journal	June 2018
AAMQS: A non-linear QCD analysis of new HERA data at small-x including heavy quarks Albacete, Javier L.; Armesto, Néstor; Milhano, José Guilherme The European Physical Journal C, Vol. 71, Issue 7 https://doi.org/10.1140/epjc/s10052-011-1705-3	journal	July 2011
Quark-gluon-plasma evolution in scaling hydrodynamics Gyulassy, M.; Matsui, T. Physical Review D, Vol. 29, Issue 3 https://doi.org/10.1103/PhysRevD.29.419	journal	February 1984
Pseudorapidity Distribution of Charged Particles in $d + A u$ Collisions at $\sqrt{s_{N N}} = 200 G e V$ Back, B. B.; Baker, M. D.; Ballintijn, M. Physical Review Letters, Vol. 93, Issue 8 https://doi.org/10.1103/PhysRevLett.93.082301	journal	August 2004
Measurement of the centrality dependence of the charged particle pseudorapidity distribution in lead–lead collisions at <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msqrt><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">NN</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>2.76</mml:mn><mml:mtext> TeV</mml:mtext></mml:math> with the ATLAS detector Aad, G.; Abbott, B.; Abdallah, J. Physics Letters B, Vol. 710, Issue 3 https://doi.org/10.1016/j.physletb.2012.02.045	journal	April 2012
QCD saturation at the LHC: Comparisons of models to p+p and A+A data and predictions for p+Pb collisions Tribedy, Prithwish; Venugopalan, Raju Physics Letters B, Vol. 710, Issue 1 https://doi.org/10.1016/j.physletb.2012.02.047	journal	March 2012
Measurement of the centrality dependence of the charged-particle pseudorapidity distribution in proton–lead collisions at $$\sqrt{s_{_\text {NN}}} = 5.02$$ s NN = 5.02 TeV with the ATLAS detector Aad, G.; Abajyan, T.; Abbott, B. The European Physical Journal C, Vol. 76, Issue 4 https://doi.org/10.1140/epjc/s10052-016-4002-3	journal	April 2016
Pseudorapidity Density of Charged Particles in $p + Pb$ Collisions at $\sqrt{s_{N N}} = 5.02 TeV$ Abelev, B.; Adam, J.; Adamová, D. Physical Review Letters, Vol. 110, Issue 3 https://doi.org/10.1103/PhysRevLett.110.032301	journal	January 2013
Proton–nucleus scattering and cross section fluctuations at RHIC and LHC Guzey, V.; Strikman, M. Physics Letters B, Vol. 633, Issue 2-3 https://doi.org/10.1016/j.physletb.2005.11.065	journal	February 2006
Centrality Dependence of the Charged-Particle Multiplicity Density at Midrapidity in Pb-Pb Collisions at $\sqrt{s_{NN}} = 2.76 TeV$ Aamodt, K.; Abrahantes Quintana, A.; Adamová, D. Physical Review Letters, Vol. 106, Issue 3 https://doi.org/10.1103/PhysRevLett.106.032301	journal	January 2011
Energy and Centrality Dependence of Rapidity Densities at RHIC Energies Wang, Xin-Nian; Gyulassy, Miklos Physical Review Letters, Vol. 86, Issue 16 https://doi.org/10.1103/PhysRevLett.86.3496	journal	April 2001
QCD saturation and deuteron–nucleus collisions Kharzeev, Dmitri; Levin, Eugene; Nardi, Marzia Nuclear Physics A, Vol. 730, Issue 3-4 https://doi.org/10.1016/j.nuclphysa.2003.08.031	journal	January 2004
Centrality dependence of particle production in $p - Pb$ collisions at $\sqrt{s_{NN}} = 5.02 TeV$ Adam, J.; Adamová, D.; Aggarwal, M. M. Physical Review C, Vol. 91, Issue 6 https://doi.org/10.1103/PhysRevC.91.064905	journal	June 2015
The effective pressure of a saturated gluon plasma Dumitru, Adrian; Gyulassy, Miklos Physics Letters B, Vol. 494, Issue 3-4 https://doi.org/10.1016/S0370-2693(00)01174-6	journal	November 2000
On solutions of the Balitsky–Kovchegov equation with impact parameter Golec-Biernat, K.; Staśto, A. M. Nuclear Physics B, Vol. 668, Issue 1-2 https://doi.org/10.1016/j.nuclphysb.2003.07.011	journal	September 2003
Manifestations of high density QCD in the first RHIC data Kharzeev, Dmitri; Levin, Eugene Physics Letters B, Vol. 523, Issue 1-2 https://doi.org/10.1016/S0370-2693(01)01309-0	journal	December 2001

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