Production of strange resonances in AA collisions at $\sqrt{s_{{\it NN}}} = 17.3$, 62.4 and 200 GeV

2014 ◽  
Vol 23 (10) ◽  
pp. 1450060 ◽  
Author(s):  
Kai-Chun Liu ◽  
Jun Song ◽  
Feng-Lan Shao
Keyword(s):  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Urqmd Model ◽  
Momentum Spectra ◽  
200 Gev ◽  
Transverse Momentum Spectra ◽  
Final Observation ◽  
Hadronic Resonances ◽  
Aa Collisions

Hadronic resonances measured experimentally by invariant mass reconstruction in relativistic heavy-ion collisions contain contributions from different production channels and/or stages, i.e., leftovers of primordial hadronization, regenerations in hadronic rescatterings and those decayed from heavier resonances. We use a UrQMD model to systematically calculate the proportions of these different channels in final observation of resonances K*(892), Σ*(1385), ϕ(1020), Ξ*(1530) and Λ(1520) and investigate the time evolution of these resonance productions in AA collisions at [Formula: see text], 62.4 and 200 GeV. We study the yields, transverse momentum spectra and elliptic flows of these resonances and discuss the survival information of the primordial hadronization in final observations.

STUDIES IN RAPIDITY AND pT-SPECTRA OF PIONS IN HIGH ENERGY NN, NA AND AA COLLISIONS: A COMPREHENSIVE APPROACH

2002 ◽  
Vol 17 (30) ◽  
pp. 4615-4634 ◽  
Author(s):  
BHASKAR DE ◽  
S. BHATTACHARYYA ◽  
P. GUPTAROY
Keyword(s):  
Transverse Momentum ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
High Energy ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Wide Range ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Aa Collisions

The present paper aims at testing a very simple approach to interpret the characteristics of inclusive production of pions in high energy NA and AA collisions by a somewhat in-depth analysis of the same for NN interactions; and also at reporting here thus some interesting observations made on the nature of rapidity and transverse momentum spectra of the produced pions. And this approach is built upon a newly offered master formula holding the key for converting the results of high energy nucleon–nucleon (NN) collision to the corresponding observables on differential and inclusive cross-sections for both nucleon–nucleus and nucleus–nucleus (heavy ion) collisions in a generalized form. The proposed formulae, used in a somewhat phenomenological way, can provide modestly reliable parametrization of data in the broad range of collision energy and the varied range of projectile-target combinations. This opens up the possibility of understanding in a quite unified manner the large amount of data on the rapidity and transverse momentum spectra in a wide range of interactions and energies starting right from ISR, rather Bevelac, to the relativistic heavy ion collisions (RHIC) via the various collider scales of energy. The agreements between the data and calculations, in most cases, are quite satisfactory both qualitatively and quantitatively. While highlighting this success, the limitation of the approach has also been pointed out in the end as clearly and categorically as possible.

scholarly journals Energy and multiplicity dependence of hadronic resonance production with ALICE at the LHC

2020 ◽  
Vol 1643 (1) ◽  
pp. 012007
Author(s):  
Angela Badalà
Keyword(s):  
Transverse Momentum ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Pp Collisions ◽  
Alice Experiment ◽  
Ion Collisions ◽  
Scattering Effects ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Hadronic Resonances

Abstract The study of hadronic resonances plays an important role both in pp and in heavy-ion collisions. Since the lifetimes of short-lived resonances are comparable with the lifetime of the fireball formed in heavy-ion collisions, regeneration and re-scattering effects can modify the measured yields, especially at low transverse momentum. Measurements in pp collisions at different energies constitute a baseline for studies in heavy-ion collisions and provide constraints for tuning QCD-inspired event generators. Furthermore, high multiplicity pp collisions, where the density and the volume of the system are expected to be larger compared to minimum bias pp collisions, can help in the search for the onset of collective phenomena. Here we present recent results on short-lived hadronic resonances obtained by the ALICE experiment at LHC energies in different collision systems (pp, p–Pb and Pb–Pb) including new results obtained in Xe–Xe collisions. The ALICE results on transverse momentum spectra, yields and their ratios to long-lived particles will be discussed.

scholarly journals ANALYZING NONEXTENSIVITY OF η-SPECTRA IN RELATIVISTIC HEAVY ION COLLISIONS AT $\sqrt{s_{NN}} = 200~{\rm GeV}$

2010 ◽  
Vol 25 (06) ◽  
pp. 1239-1251 ◽  
Author(s):  
BHASKAR DE ◽  
GOUTAM SAU ◽  
S. K. BISWAS ◽  
S. BHATTACHARYYA ◽  
P. GUPTAROY
Keyword(s):  
Transverse Momentum ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Ion Collisions ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra

The transverse momentum spectra of secondary η particles produced in P+P, D + Au and Au + Au interactions at [Formula: see text] at different centralities have been studied in the light of a nonextensive thermodynamical approach. The results and the possible thermodynamical insights, thus obtained, about the hadronizing process have also been discussed in detail.

scholarly journals PRODUCTIONS OF HEAVY FLAVORED MESONS IN RELATIVISTIC HEAVY ION COLLISIONS IN THE RECOMBINATION MODEL

2011 ◽  
Vol 20 (05) ◽  
pp. 1213-1226 ◽  
Author(s):  
R. PENG ◽  
C. B. YANG
Keyword(s):  
Experimental Data ◽  
Transverse Momentum ◽  
Heavy Quark ◽  
Heavy Ion ◽  
Relativistic Heavy Ion Collisions ◽  
Recombination Model ◽  
Ion Collisions ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Fragmentation Functions

We find the distributions of shower partons initiated by heavy quarks c and b by studying the fragmentation functions in the framework of the recombination model. The transverse momentum spectra of heavy flavored mesons are predicted with these distributions. We find that the contribution from the recombination of thermal-shower partons is an important part in the total spectrum for the mesons. We predict the heavy flavored meson productions for different centralities with the heavy quark fugacities fitted by the experimental data of J/ψ transverse momentum spectra in Au+Au collisions.

scholarly journals Measurement of the Hadronic Resonance Production with ALICE at the CERN LHC

Universe ◽  
2018 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Maria Vasileiou On behalf of the ALICE Collaboration
Keyword(s):  
Heavy Ion Collisions ◽  
Hadron Collider ◽  
Theoretical Models ◽  
Heavy Ion ◽  
Resonance Production ◽  
Ion Collisions ◽  
Momentum Spectra ◽  
Transverse Momentum Spectra ◽  
Hadronic Resonances ◽  
Freeze Out

We present a comprehensive study of hadronic resonance production in pp, p-Pb and Pb-Pb collisions at different Large Hadron Collider (LHC) energies. In particular, the production of hadronic resonances, such as ρ(770)0, Κ*(892)0, φ(1020), Σ(1385)±, Λ(1520) and Ξ(1530)0 will be discussed in detail. In heavy-ion collisions, hadronic resonances are sensitive to the re-scattering and regeneration processes occurring between chemical freeze-out and kinetic freeze-out due to their short lifetimes. The measurements in pp and p-Pb collisions are used as a reference for heavy-ion collisions and to search for the onset of collective phenomena. We will report on the transverse momentum spectra, integrated yields, mean transverse momenta, particle ratios and nuclear modification factors of hadronic resonances. The results will be compared to those of other experiments, and to theoretical models and Monte Carlo generators.

Sign in / Sign up

Export Citation Format

Share Document