Heavy-ion physics at the LHC: Review of Run I results

Bala, R.; Bautista, I.; Bielčíková, J.; Velasquez, A. Ortiz

doi:10.1142/s0218301316420064

Cited by 19 publications

(17 citation statements)

References 148 publications

(114 reference statements)

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“…Recent results on particle production at the LHC obtained in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions revealed phenomena which are similar to those seen in Pb-Pb collisions where they are attributed to bulk collective effects [1,2]. Apart from the peculiar patterns seen in two-particle azimuthal correlations [3,4], notably, some of these observations are the radial flow signals [5,6] and the strangeness enhancement [7,8].…”

Section: Introductionmentioning

confidence: 97%

New results on the multiplicity and centre-of-mass energy dependence of identified particle production in pp collisions with ALICE

Bencédi¹

2018

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2017)

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The study of identified particle production in proton-proton (pp) collisions as a function of centerof-mass energy ( √ s) and event charged-particle multiplicity is a key tool for understanding similarities and differences between small and large collision systems. We report on new measurements of the production of identified particles and their dependence on multiplicity and √ s.Latest results for light flavor hadrons, comprising π ± , K ± , p(p), single-strange (K 0 S ,Λ, and Λ),and Ω + ) particles as well as resonances (K * 0 , K * 0 , φ ), are presented for √ s = 5.02, 7, and 13 TeV -measurements for √ s = 5.02 TeV pp collisions are reported here for the first time. The measured minimum bias p T spectra and yields were complemented with multiplicity-dependent measurements for single-and multi-strange hadrons at √ s = 7 and √ s = 13 TeV. Results are compared to measurements at lower collision energies as well as to those in proton-lead (p-Pb) and lead-lead (Pb-Pb) collisions, respectively at √ s NN = 5.02 TeV and √ s NN = 2.76 TeV.The results unveil intriguing similarities among collision systems at different center-of-mass energies. The production rates of strange hadrons are found to increase more than those of non-strange particles, showing an enhancement pattern with multiplicity which does not depend on the collision energy. These yield ratios take values which are alike for small systems at comparable multiplicities, and show smooth evolution with multiplicity across all collision systems; they tend to approach those measured in Pb-Pb collisions. Although, the multiplicity dependence of spectral shapes can be qualitatively described by general-purpose Monte Carlo (MC) event generators, the evolution of integrated yield ratios is barely (or not) captured at all by MC model predictions.

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Section: Introductionmentioning

confidence: 97%

New results on the multiplicity and centre-of-mass energy dependence of identified particle production in pp collisions with ALICE

Bencédi¹

2018

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2017)

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“…Probes of the QGP phase had been found by large experimental efforts at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC) [17,18,19,20].…”

Section: Introductionmentioning

confidence: 99%

String percolation threshold for elliptically bounded systems

Ramírez¹,

Téllez²,

Bautista³

2017

Physica A: Statistical Mechanics and its Applications

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It has been shown that a hot and dense deconfined nuclear matter state produced in ultra-relativistic heavy-ion collisions, can be quantitatively described by the String Percolation phenomenological model. The model address the phase transition in terms of the two-dimensional continuum percolation theory over strings, which are schematic representations of the fundamental interactions among the partons of the colliding nuclei in the initial state. In this work, we present an extension of the critical string density results including the eccentricity dependence on the initial state geometry focus on small string number with different density profile, small deviations from the different profile densities are found. The percolation threshold shows consistency with the thermodynamic limit for the uniform density profile with a large number of strings in the case of circular boundary system. A significant dependence on the eccentricity for a small number of strings compared to high occupancy systems is exhibited, the implications may become relevant in hadron-hadron or hadron-nucleus collision systems.

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“…The relationship with the QCD phase diagram can be derived in terms of the thermodynamical quantities [3]. In these manuscript we extend the results to study the signatures of collective effects which has been shown on recent results on p-p and p-Pb (small systems) collisions measured by the collaborations ALICE, CMS and ATLAS at LHC energies [4] [5], and which origin is still not fully understand.…”

Section: Introductionmentioning

confidence: 65%