scholarly journals Multiplicity Dependence in the Non-Extensive Hadronization Model Calculated by the HIJING++ Framework

Universe ◽  
2019 ◽  
Vol 5 (6) ◽  
pp. 134 ◽  
Author(s):  
Gábor Bíró ◽  
Gergely Gábor Barnaföldi ◽  
Gábor Papp ◽  
Tamás Sándor Biró
Keyword(s):  
Experimental Data ◽  
High Energy ◽  
High Multiplicity ◽  
Monte Carlo Event ◽  
Status Report ◽  
Event Generator ◽  
Model Parameters ◽  
Mass Scaling ◽  
Wide Range ◽  
Hadronization Model

The non-extensive statistical description of the identified final state particles measured in high energy collisions is well-known by its wide range of applicability. However, there are many open questions that need to be answered, including but not limited to, the question of the observed mass scaling of massive hadrons or the size and multiplicity dependence of the model parameters. This latter is especially relevant, since currently the amount of available experimental data with high multiplicity at small systems is very limited. This contribution has two main goals: On the one hand we provide a status report of the ongoing tuning of the soon-to-be-released HIJING++ Monte Carlo event generator. On the other hand, the role of multiplicity dependence of the parameters in the non-extensive hadronization model is investigated with HIJING++ calculations. We present cross-check comparisons of HIJING++ with existing experimental data to verify its validity in our range of interest as well as calculations at high-multiplicity regions where we have insufficient experimental data.

scholarly journals Modelling the Inflation and Elastic Instabilities of Rubber-Like Spherical and Cylindrical Shells Using a New Generalised Neo-Hookean Strain Energy Function

2021 ◽  
Author(s):  
Afshin Anssari-Benam ◽  
Andrea Bucchi ◽  
Giuseppe Saccomandi
Keyword(s):  
Experimental Data ◽  
Energy Function ◽  
Limit Point ◽  
Strain Energy ◽  
Cylindrical Shells ◽  
Strain Energy Function ◽  
Model Parameters ◽  
Wide Range ◽  
Cylindrical Tubes ◽  
Gent Model

AbstractThe application of a newly proposed generalised neo-Hookean strain energy function to the inflation of incompressible rubber-like spherical and cylindrical shells is demonstrated in this paper. The pressure ($P$ P ) – inflation ($\lambda $ λ or $v$ v ) relationships are derived and presented for four shells: thin- and thick-walled spherical balloons, and thin- and thick-walled cylindrical tubes. Characteristics of the inflation curves predicted by the model for the four considered shells are analysed and the critical values of the model parameters for exhibiting the limit-point instability are established. The application of the model to extant experimental datasets procured from studies across 19th to 21st century will be demonstrated, showing favourable agreement between the model and the experimental data. The capability of the model to capture the two characteristic instability phenomena in the inflation of rubber-like materials, namely the limit-point and inflation-jump instabilities, will be made evident from both the theoretical analysis and curve-fitting approaches presented in this study. A comparison with the predictions of the Gent model for the considered data is also demonstrated and is shown that our presented model provides improved fits. Given the simplicity of the model, its ability to fit a wide range of experimental data and capture both limit-point and inflation-jump instabilities, we propose the application of our model to the inflation of rubber-like materials.

kronos: A Monte Carlo event generator for higher order QED corrections at HERA — Status report

1992 ◽  
Vol 29 (1) ◽  
pp. 247-252
Author(s):  
Harald Anlauf ◽  
Panagiotis Manakos ◽  
Thomas Mannel ◽  
Hans D. Dahmen ◽  
Thorsten Ohl
Keyword(s):  
Monte Carlo ◽  
Higher Order ◽  
Monte Carlo Event ◽  
Status Report ◽  
Event Generator ◽  
Monte Carlo Event Generator

scholarly journals e±-rich GRB Fireball and Infrared Flashes

2003 ◽  
Vol 214 ◽  
pp. 331-332
Author(s):  
Zhuo Li ◽  
Z. G. Dai ◽  
T. Lu
Keyword(s):  
Gamma Ray ◽  
Lorentz Factor ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Rapid Response ◽  
Model Parameters ◽  
Wide Range ◽  
Very High Energy ◽  
Very High

Gamma-ray bursts (GRBs) are believed to originate from ultra-relativistic fireballs, with initial Lorentz factor η ∼ 102 − 103. However very high energy photons may still suffer from γγ interaction. We show here that in a wide range of model parameters, the resulting pairs may dominate electrons associated with the fireball baryons. This may provide an explanation for the rarity of prompt optical detections. A rapid response to the GRB trigger at the IR band would detect such a strong flash.

scholarly journals Inverse Compton signatures of gamma-ray burst afterglows

2020 ◽  
Vol 496 (1) ◽  
pp. 974-986 ◽  
Author(s):  
H Zhang ◽  
I M Christie ◽  
M Petropoulou ◽  
J M Rueda-Becerril ◽  
D Giannios
Keyword(s):  
Blast Wave ◽  
Gamma Ray ◽  
Light Attenuation ◽  
High Energy ◽  
Model Parameters ◽  
Late Time ◽  
Photon Field ◽  
Wide Range ◽  
Inverse Compton ◽  
Infrared Photon

ABSTRACT The afterglow emission from gamma-ray bursts (GRBs) is believed to originate from a relativistic blast wave driven into the circumburst medium. Although the afterglow emission from radio up to X-ray frequencies is thought to originate from synchrotron radiation emitted by relativistic, non-thermal electrons accelerated by the blast wave, the origin of the emission at high energies (HE; ≳GeV) remains uncertain. The recent detection of sub-TeV emission from GRB 190114C by the Major Atmospheric Gamma Imaging Cherenkov Telescopes (MAGIC) raises further debate on what powers the very high energy (VHE; ≳300 GeV) emission. Here, we explore the inverse Compton scenario as a candidate for the HE and VHE emissions, considering two sources of seed photons for scattering: synchrotron photons from the blast wave (synchrotron self-Compton or SSC) and isotropic photon fields external to the blast wave (external Compton). For each case, we compute the multiwavelength afterglow spectra and light curves. We find that SSC will dominate particle cooling and the GeV emission, unless a dense ambient infrared photon field, typical of star-forming regions, is present. Additionally, considering the extragalactic background light attenuation, we discuss the detectability of VHE afterglows by existing and future gamma-ray instruments for a wide range of model parameters. Studying GRB 190114C, we find that its afterglow emission in the Fermi-Large Area Telescope (LAT) band is synchrotron dominated. The late-time Fermi-LAT measurement (i.e. t ∼ 104 s), and the MAGIC observation also set an upper limit on the energy density of a putative external infrared photon field (i.e. ${\lesssim} 3\times 10^{-9}\, {\rm erg\, cm^{-3}}$), making the inverse Compton dominant in the sub-TeV energies.

DIELECTRON PRODUCTION IN Ar+KCl AT 1.756 AGeV WITH HADES

2009 ◽  
Vol 24 (02n03) ◽  
pp. 603-606
Author(s):  
◽  
FILIP KŘÍŽEK
Keyword(s):  
Experimental Data ◽  
Monte Carlo ◽  
Data Analysis ◽  
Thermal Model ◽  
Beam Energy ◽  
Monte Carlo Event ◽  
Event Generator ◽  
Monte Carlo Event Generator ◽  
Hades Collaboration ◽  
Experimental Data Analysis

The HADES collaboration studied dielectron production in C + C , p + p , and d + p reactions, with the main goal to investigate properties of vectors mesons through their dielectron decay. Production of e+e- pairs in Ar + KCl collisions at a beam energy of 1.756 A GeV was measured recently by the collaboration and preliminary results of the experimental data analysis will be reported. Pair spectra will be compared with a prediction of a thermal model based on the Monte Carlo event generator Pluto.

scholarly journals PHANTOM: A Monte Carlo event generator for six parton final states at high energy colliders

2009 ◽  
Vol 180 (3) ◽  
pp. 401-417 ◽  
Author(s):  
Alessandro Ballestrero ◽  
Aissa Belhouari ◽  
Giuseppe Bevilacqua ◽  
Vladimir Kashkan ◽  
Ezio Maina
Keyword(s):  
Monte Carlo ◽  
High Energy ◽  
Monte Carlo Event ◽  
Event Generator ◽  
Final States ◽  
Monte Carlo Event Generator

scholarly journals Corium Experimental Thermodynamics: A Review and Some Perspectives

Thermo ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 179-204
Author(s):  
Marc Barrachin
Keyword(s):  
Experimental Data ◽  
Equilibrium Constants ◽  
Research Area ◽  
Severe Accident ◽  
Model Parameters ◽  
Joint Research ◽  
Research Perspectives ◽  
Wide Range ◽  
Simple Physical Model ◽  
Water Reactors

More than 30 years ago a specialist meeting was held at Joint Research Center Ispra (Italy) from 15 to 17 January 1990 to review the current understanding of chemistry during severe accidents in light water reactors (LWR). Let us consider that, at the end of the 1980s, thermodynamics introduced in the severe accident codes was really poor. Only some equilibrium constants for a few simple reactions between stoichiometric compounds were used as well as some simple correlations giving estimates of solidus and liquidus temperatures. In the same time, the CALPHAD method was developed and was full of promise to approximate the thermodynamic properties of a complex thermochemical system by the way of a critical assessment of experimental data, a definition of a simple physical model and an optimisation procedure to define the values of the model parameters. It was evident that a nuclear thermodynamic database had to be developed with that new technique to obtain quite rapidly prominent progress in the knowledge of thermochemistry in the severe accident research area. Discussions focused on the important chemical phenomena that could occur across the wide range of conditions of a damaged nuclear plant. The most pressing need for improved chemical models is identified with condensed phase mixtures to model the corium progression. This paper reviews more than 30 years of experimental data production in the field of corium thermodynamics. This work has been conducted through multiple international programs (EURATOM, ISTC, OECD) as well as through more specific studies conducted at the national scale. This research has been capitalised in specific databases such as NUCLEA and TAF-ID, databases developed at IRSN and at CEA, respectively, and are now used in degradation models of the severe accident simulation codes. This research is presented in this paper. In the conclusion, we outline the research perspectives that need to be considered in order to address today’s and tomorrow’s issues.

scholarly journals Event generation with Sherpa 2.2

2019 ◽  
Vol 7 (3) ◽  
Author(s):  
Enrico Bothmann ◽  
Gurpreet Singh Chahal ◽  
Stefan Höche ◽  
Johannes Krause ◽  
Frank Krauss ◽  
...  
Keyword(s):  
Monte Carlo ◽  
High Energy ◽  
General Purpose ◽  
Particle Collision ◽  
Monte Carlo Event ◽  
Event Generator ◽  
Particle Collisions ◽  
Monte Carlo Event Generator ◽  
Event Generation ◽  
High Energy Collider

Sherpa is a general-purpose Monte Carlo event generator for the simulation of particle collisions in high-energy collider experiments. We summarise essential features and improvements of the Sherpa 2.2 release series, which is heavily used for event generation in the analysis and interpretation of LHC Run 1 and Run 2 data. We highlight a decade of developments towards ever higher precision in the simulation of particle-collision events.

VLE Determination of Carbon Dioxide Loaded Aqueous Alkanolamine Mixtures Using Modified Kent Eisenberg Model

2017 ◽  
Vol 231 (11-12) ◽  
Author(s):  
Humbul Suleman ◽  
Abdulhalim Shah Maulud ◽  
Zakaria Man
Keyword(s):  
Experimental Data ◽  
Carbon Dioxide ◽  
Model Parameters ◽  
Thermodynamic Models ◽  
Carbon Dioxide Absorption ◽  
Proposed Model ◽  
Wide Range ◽  
Experimental Values ◽  
Good Agreement

AbstractA computationally simple thermodynamic framework has been presented to correlate the vapour-liquid equilibria of carbon dioxide absorption in five representative types of alkanolamine mixtures. The proposed model is an extension of modified Kent Eisenberg model for the carbon dioxide loaded aqueous alkanolamine mixtures. The model parameters are regressed on a large experimental data pool of carbon dioxide solubility in aqueous alkanolamine mixtures. The model is applicable to a wide range of temperature (298–393 K), pressure (0.1–6000 kPa) and alkanolamine concentration (0.3–5 M). The correlated results are compared to the experimental values and found to be in good agreement with the average deviations ranging between 6% and 20%. The model results are comparable to other thermodynamic models.

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