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From the correlation structure of transverse momentum $p_t$ in relativistic nuclear collisions we observe for the first time temperature/velocity structure resulting from low-$Q^2$ partons. Our novel analysis technique does not invoke an…

High Energy Physics - Phenomenology · Physics 2009-11-11 Thomas A Trainor , Duncan J Prindle

We briefly comment on the ridge-like structure origin in the nuclear and hadronic reactions emphasizing that this structure in the two-particle correlation function can result from the rotation of the transient state of matter.

High Energy Physics - Phenomenology · Physics 2010-10-12 S. M. Troshin , N. E. Tyurin

The second data release from ESA's Gaia mission has revealed many ridge-like structures in the velocity distribution of the Milky Way. We show that these can arise naturally from winding transient spiral structure that is commonly seen in…

Astrophysics of Galaxies · Physics 2018-09-26 Jason A. S. Hunt , Jack Hong , Jo Bovy , Daisuke Kawata , Robert J. J. Grand

In this paper, we give an account of the peripheral-tube model, which has been developed to give an intuitive and dynamical description of the so-called ridge effect in two-particle correlations in high-energy nuclear collisions. Starting…

Nuclear Theory · Physics 2021-02-03 Yogiro Hama , Takeshi Kodama , Wei-Liang Qian

The long-range near-side ridge phenomenon in two-particle correlation is crucial for understanding the motion of partons after high-energy heavy-ion collisions. While it has been well explained by the hydrodynamic flow effect of the…

High Energy Physics - Phenomenology · Physics 2024-03-05 Jeongseok Yoon , Jin-Hee Yoon

Many biological tissues feature a heterogeneous network of fibers whose tensile and bending rigidity contribute substantially to these tissues' elastic properties. Rigidity percolation has emerged as a important paradigm for relating these…

Triggered di-hadron correlation studies using central Au+Au collisions at $\sqrt{S_{NN}}$ = 200 GeV in STAR revealed a novel ridge-like structure in two dimensions ($\Delta\eta$,$\Delta\phi$) for high $p_{T}$ particles. A similar structure…

Nuclear Experiment · Physics 2015-06-11 L. Chanaka De Silva

Random feature ridge regression is often analyzed in the high-dimensional regime under the homogeneous sampling model $x_i=\Sigma^{1/2}x_i'$, where the vectors $x_i'$ have iid entries and the same covariance matrix $\Sigma$ is shared by all…

Machine Learning · Statistics 2026-05-19 Issa-Mbenard Dabo , Jérémie Bigot

The STAR Collaboration at RHIC presents a systematic study of high transverse momentum charged di-hadron correlations at small azimuthal pair separation \dphino, in d+Au and central Au+Au collisions at $\rts = 200$ GeV. Significant…

Nuclear Experiment · Physics 2010-01-11 The STAR Collaboration , B. I. Abelev

Detailed study of centrality dependence of low-p_t manifestation of so-called "near-side ridge" phenomenon is reported recently by STAR for all charged hadrons with p_t>0.15 GeV/c from AuAu collisions at 62 and 200 GeV at RHIC[1]. It is…

High Energy Physics - Phenomenology · Physics 2010-12-02 O. Kochebina , G. Feofilov

It is argued that the superposition approach, where partons are independently emitted from longitudinally extended sources in the early stage, is fully compatible with the experimental results for the forward-backward multiplicity…

Nuclear Theory · Physics 2017-04-05 Adam Olszewski , Wojciech Broniowski

It is shown that the anomalous sharp increasing of the strength of the near-side ridge structures observed in Au-Au collisions at $\sqrt{s}=$ 62 GeV and $\sqrt{s}=$ 200 GeV and the onset of the ridge structure in pPb and in pp collisions…

High Energy Physics - Phenomenology · Physics 2014-12-15 C. Andrés , A. Moscoso , C. Pajares

We study ridge correlations of the glasma in pp collisions at $\sqrt{s_{\mathrm{NN}}}=7$ TeV by using the color glass condensate (CGC) formalism. The azimuthal collimation at long range rapidity is intrinsic to glasma dynamics and is…

High Energy Physics - Phenomenology · Physics 2021-05-05 Donghai Zhang , Yeyin Zhao , Mingmei Xu , Xue Pan , Yuanfang Wu

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 obtain prompt di-photon cross-section in proton-nucleus collisions in Hamiltonian light-cone approach within a hybrid approximation, treating the projectile proton in the parton model and the target nucleus in the Color-Glass-Condensate…

High Energy Physics - Phenomenology · Physics 2015-11-04 Alex Kovner , Amir H. Rezaeian

ATLAS has measured two-particle correlations as a function of relative azimuthal-angle, $\Delta \phi$, and pseudorapidity, $\Delta \eta$, in $\sqrt{s}$=13 and 2.76 TeV $pp$ collisions at the LHC using charged particles measured in the…

High Energy Physics - Experiment · Physics 2016-09-30 ATLAS Collaboration

Making use of recently released data on dihadron correlations by the STAR collaboration, I analyze the long-range ("ridge-like") part of these data and show that the dependence on both transverse momentum as well as orientation with respect…

Nuclear Theory · Physics 2015-03-17 Matthew Luzum

Recent data from heavy ion collisions at RHIC show unexpectedly large near-angle correlations that broaden longitudinally with increasing centrality. The amplitude of this ridge-like correlation rises rapidly, reaches a maximum, and then…

Nuclear Theory · Physics 2015-05-27 Paul Sorensen , Boris Bolliet , Agnes Mocsy , Yadav Pandit , Navneet Pruthi

Following previous work [1], we propose to analyze the rapidity dependence of transverse momentum and transverse-momentum multiplicity correlations. We demonstrate that the orthogonal polynomial expansion of the latter has the potential to…

High Energy Physics - Phenomenology · Physics 2017-10-03 Adam Bzdak

Recently, the first direct measurement of a full 6D accelerator beam distribution was reported [1]. That work observed a correlation between energy and transverse coordinates, for which the energy distribution becomes hollowed and…

Accelerator Physics · Physics 2021-01-20 K. Ruisard , A. Aleksandrov