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Hadron and string cascade model (JPCIAE) with the hypothesis without introducing the quark-gluon plasma (QGP), is employed to study the direct photon and $\pi^0$ transverse momentum distributions for central $^{208}$Pb+$^{208}$Pb collisions…

High Energy Physics - Phenomenology · Physics 2007-05-23 Zhiyi Liu , Benhao Sa , Shuhua Zhou

Understanding the origin of collectivity-like signatures in small collision systems is a central open question in high-energy nuclear physics, and two-particle correlation functions offer unique sensitivity to the underlying-event (UE)…

High Energy Physics - Phenomenology · Physics 2026-05-29 Subhadeep Roy , Sadhana Dash

The Multi-particle technique has been used to unravel the nature of the long-range collectivity in small collision systems. A large three-particle mixed-harmonic correlation signal was recently observed by the ATLAS Collaboration, but the…

Nuclear Theory · Physics 2019-06-04 Chunjian Zhang , Jiangyong Jia , Jun Xu

Correlations between particles separated by several units of pseudorapidity were discovered in high-multiplicity pp and p-Pb collisions at the LHC. These long-range structures observed in two-particle correlation functions are reminiscent…

Nuclear Experiment · Physics 2019-01-04 Alice Ohlson

Experimental probes of the Quark-Gluon Plasma (QGP) generated in heavy-ion collisions span a broad range in momentum scale: low transverse momentum (low $p_T$) measurements probe collective dynamics, while high $p_T$ measurements probe the…

Nuclear Theory · Physics 2025-12-12 Lipei Du , P. M. Jacobs

Color flux tubes (quark-gluon strings), formed at early stages of hadron-hadron collisions, may overlap in case of sufficiently high densities and interact, producing long-range azimuthal correlations. In the hypothesis of repulsive…

High Energy Physics - Phenomenology · Physics 2017-02-22 Igor Altsybeev , Grigory Feofilov

Measurements at LHC show an increased production of strange hadrons with charged multiplicity in pp collisions, which is not described by the Lund String Model (with the Monash tune) implemented in PYTHIA. This work investigates string…

High Energy Physics - Phenomenology · Physics 2026-05-01 Javira Altmann , Lorenzo Bernardinis , Peter Skands , Valentina Zaccolo

The increase of strange-particle yields relative to pions versus charged-particle multiplicity in proton-proton (pp) collisions at the LHC is usually described by microscopic or hydrodynamical models as a result of the increasing density of…

High Energy Physics - Phenomenology · Physics 2021-09-14 Constantin Loizides , Andreas Morsch

Angular correlations between unidentified charged trigger particles and various species of charged associated particles (unidentified particles, pions, kaons, protons and antiprotons) are measured by the ALICE detector in p-Pb collisions at…

Nuclear Experiment · Physics 2014-09-16 ALICE Collaboration

The pp collisions have been studied for a long time, however, there are still some effects which are not completely understood, such as the long range angular correlations and the flow patterns in high multiplicity events, which were…

High Energy Physics - Phenomenology · Physics 2015-06-24 Eleazar Cuautle , Antonio Ortiz , Guy Paic

We revisit the D-measure of event-by-event net-electric charge fluctuations, an idea first introduced over 20 years ago as a potential signature for the presence of quark-gluon plasma (QGP) in heavy-ion collisions. We developed a…

Nuclear Theory · Physics 2025-09-22 Jonathan Parra , Roman Poberezhniuk , Volker Koch , Claudia Ratti , Volodymyr Vovchenko

Strange hadron production in pp collisions at $\sqrt{s}~=~7$ TeV is studied in jets and underlying events using the PYTHIA8 event generator. Matching strange hadrons to the jet area and the underlying event area is expected to help us…

High Energy Physics - Phenomenology · Physics 2022-03-28 Pengyao Cui , Zhongbao Yin , Liang Zheng

A new variant of the effective pomeron exchange model is proposed for the description of the correlation, observed in $pp$ and $p\bar{p}$ collisions at center-of-mass energy from SPS to LHC, between mean transverse momentum and charged…

High Energy Physics - Phenomenology · Physics 2022-09-21 Evgeniia Bodnia , Denis Derkach , Grigory Feofilov , Vladimir Kovalenko , Andrey Puchkov

The fractal and phase transitional properties of each type of pions (i.e. $\pi^{\pm,0}$) through one-dimensional $\eta-$space, at an energy of $\sqrt{s}=13~$TeV, have been studied with the help of the Scaled Factorial Moment (SFM)…

High Energy Physics - Phenomenology · Physics 2024-09-05 Tumpa Biswas , Dibakar Dhar , Azharuddin Ahmed , Prabir Kumar Haldar , Abdel Nasser Tawfik

A brief review of the string percolation model and its results are presented together with the comparison to experimental data. First, it is done an introduction to the quark-gluon phase diagram and the lattice results concerning the…

High Energy Physics - Phenomenology · Physics 2019-05-17 I. Bautista , C. Pajares , J. E. Ramírez

This Letter presents the measurement of near-side associated per-trigger yields, denoted ridge yields, from the analysis of angular correlations of charged hadrons in proton-proton collisions at $\sqrt{s}$ = 13 TeV. Long-range ridge yields…

Nuclear Experiment · Physics 2024-06-10 ALICE Collaboration

We report measurements of large-scale two-particle correlations for 200 GeV p-p collisions on momentum components transverse rapidity $y_t$ (pion mass assigned), pseudorapidity $\eta$ and azimuth angle $\phi$. In both transverse $y_t…

High Energy Physics - Phenomenology · Physics 2007-05-23 R. J. Porter , T. A. Trainor

The properties of the strongly intensive variable characterizing correlations between the number of particles in two separated rapidity interval in pp interactions at LHC energies are studied in the framework of the string fusion model. We…

High Energy Physics - Phenomenology · Physics 2021-02-03 V. V. Vechernin , S. N. Belokurova

In the framework of the model with string fusion and the formation of string clusters the correlations between multiplicities in two separated rapidity windows in pp collisions at LHC energies were studied and the results obtained were…

High Energy Physics - Phenomenology · Physics 2023-11-10 Svetlana Belokurova , Vladimir Vechernin

It is the purpose of this note to point out that the CMS observation is in line with previous observations in particle physics at large transverse momenta and/or high multiplicities at lower energies, which were interpreted as possible…

High Energy Physics - Phenomenology · Physics 2010-10-06 Michael J. Tannenbaum , Richard M. Weiner