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Related papers: Angular correlations in pA collisions from CGC: mu…

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Considering a dilute-dense situation suitable for pA collisions, we compute in the Color Glass Condensate the correlation between azimuthal asymmetries, specifically the squared second Fourier coefficient $v_2^2$, and the total multiplicity…

High Energy Physics - Phenomenology · Physics 2021-07-30 Tolga Altinoluk , Néstor Armesto , Alex Kovner , Michael Lublinsky , Vladimir V. Skokov

For ultrarelativistic proton-proton and proton-nucleus collisions, we perform an exploratory study of the contribution to the elliptic flow $v_2$ coming from the orientation of the momentum of the produced particles with respect to the…

High Energy Physics - Phenomenology · Physics 2017-05-09 Edmond Iancu , Amir H. Rezaeian

The CMS experiment at the Large Hadron Collider has recently presented data on the average transverse momentum of protons, kaons and pions as a function of particle multiplicity. We relate the particle multiplicity to saturation momentum…

High Energy Physics - Phenomenology · Physics 2015-06-16 Larry McLerran , Michal Praszalowicz , Bjoern Schenke

The energy and rapidity dependence of the average transverse momentum $\langle p_T \rangle$ in $pp$ and $pA$ collisions at RHIC and LHC energies are estimated using the Colour Glass Condensate (CGC) formalism. We update previous predictions…

High Energy Physics - Phenomenology · Physics 2016-08-31 F. O. Durães , A. V. Giannini , V. P. Goncalves , F. S. Navarra

Experiments at the LHC have recently reported results on the angular asymmetry coefficients $v_n[m]$, for various angular moments $n$ and orders of cumulants $m$, in high multiplicity p+Pb collisions. These coefficients are large, and have…

High Energy Physics - Phenomenology · Physics 2014-01-20 Adrian Dumitru , Tuomas Lappi , Larry McLerran

Two-particle number and transverse momentum differential correlation functions are powerful tools for unveiling the detailed dynamics and particle production mechanisms involved in relativistic heavy-ion collisions. Measurements of…

Data Analysis, Statistics and Probability · Physics 2019-03-28 Victor Gonzalez , Ana Marin , Pedro Ladron de Guevara , Jinjin Pan , Sumit Basu , Claude Pruneau

We show that the correlation between the elliptic momentum anisotropy, $v_2$, and the average transverse momentum, $[p_T]$, at fixed multiplicity in small system nuclear collisions carries information on the origin of the observed momentum…

Nuclear Theory · Physics 2020-11-11 Giuliano Giacalone , Bjoern Schenke , Chun Shen

The multiplicity, average transverse momentum, and charged particle transverse momentum distributions have recently been measured in LHC experiments. The multiplicity and average transverse momentum grow with beam energy. Such growth is…

High Energy Physics - Phenomenology · Physics 2014-11-21 Larry McLerran , Michal Praszalowicz

We derive an analytical expression for the two-gluon production in the pA (light-heavy) collisions, and focus specifically on the rapidity dependent part. We approximate the gauge field from the heavy target as the Color Glass Condensate…

High Energy Physics - Phenomenology · Physics 2008-11-26 Kenji Fukushima , Yoshimasa Hidaka

We report on two-particle charge-dependent correlations in pp, p-Pb, and Pb-Pb collisions as a function of the pseudorapidity and azimuthal angle difference, $\mathrm{\Delta}\eta$ and $\mathrm{\Delta}\varphi$ respectively. These…

Nuclear Experiment · Physics 2016-03-25 ALICE Collaboration

The two-particle differential transverse momentum correlator $G_{2}$ recently measured in Pb$-$Pb collisions, emerged as a powerful tool to gain insight into particle production mechanisms and to infer transport properties such as the ratio…

Nuclear Experiment · Physics 2022-11-22 Victor Gonzalez

The correlation between the mean transverse momentum, $[p_{\mathrm{T}}]$, and the squared anisotropic flow, $v^{2}_{n}$, on an event-by-event basis has been suggested to be influenced by the initial conditions in heavy-ion collisions. We…

Nuclear Experiment · Physics 2026-05-14 The STAR Collaboration

The first moment <p_T> of the charged-particle transverse momentum spectrum and its correlation with the charged-particle multiplicity N_{ch} provide vital information about the underlying particle production mechanism. The ALICE…

High Energy Physics - Phenomenology · Physics 2013-11-11 Amir H. Rezaeian

In the Color Glass Condensate formalism, we evaluate the 3-dipole correlator up to the $\frac{1}{N_c^4}$ order with $N_c$ being the number of colors, and compute the azimuthal cumulant $c_{123}$ for 3-particle productions. In addition, we…

High Energy Physics - Phenomenology · Physics 2019-02-27 Cheng Zhang , Manyika Kabuswa Davy , Yu Shi , Enke Wang

Differential two-particle normalized cumulants ($R_2$) and transverse momentum correlations ($P_2$) are measured as a function of the relative pseudorapidity and azimuthal angle difference $( \Delta \eta, \Delta \varphi )$ of charged…

Nuclear Experiment · Physics 2025-11-18 ALICE Collaboration

Within the Color Glass Condensate (CGC) effective field theory, we investigate the long-range rapidity correlations in proton-lead (p-Pb) collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV. A distinctive correlation rebound is observed, where…

High Energy Physics - Phenomenology · Physics 2026-02-03 Donghai Zhang , Yeyin Zhao , Luhua Qiu , Mingmei Xu , Yuanfang Wu

We have measured the second-order normalized differential factorial moments as a function of the difference of transverse momentum ($\Delta p_T$) in $\p^+ p$ and $K^+ p$ collisions at 250 GeV/$c$. The second-order differential factorial…

High Energy Physics - Experiment · Physics 2007-05-23 Jan Czyzewski

Measurements of the event-by-event correlation between elliptic flow ($v_2$) and the mean transverse momentum ($[p_{\rm T}]$) using the modified Pearson correlation coefficient $\rho(v_2^2,[p_{\rm T}])$ are reported in pp collisions at…

Nuclear Experiment · Physics 2026-03-16 ALICE Collaboration

We show that particle production in proton-nucleus (pA) collisions in the Color Glass Condensate model can be related to Deep Inelastic Scattering of leptons on protons/nuclei (DIS). The common building block is the quark antiquark (or…

High Energy Physics - Phenomenology · Physics 2011-01-25 F. Gelis , J. Jalilian-Marian

This paper presents the first measurements of the charge independent (CI) and charge dependent (CD) two-particle transverse momentum correlators $G_{2}^{\rm CI}$ and $G_{2}^{\rm CD}$ in Pb--Pb collisions at $\sqrt{s_{\text{NN}}} =…

Nuclear Experiment · Physics 2020-06-19 ALICE Collaboration
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