Special Issue "Statistical Approaches in High Energy Physics"

A special issue of Physics (ISSN 2624-8174). This special issue belongs to the section "High Energy Physics".

Deadline for manuscript submissions: closed (20 June 2021).

Special Issue Editors

Prof. Dr. Edward Sarkisyan-Grinbaum
E-Mail Website
Guest Editor
1. Experimental Physics Department, CERN, 1211 Geneva 23, Switzerland
2. Department of Physics, The University of Texas at Arlington, Arlington, TX 76019, USA
Interests: high-energy physics (in particular, multihadron production, quantum chromodynamics, and physics beyond the Standard Model); astroparticle physics; gravitation; cosmology; complex systems and critical phenomena; probability and statistics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Airton Deppman
E-Mail Website
Guest Editor
Institute of Physics, the São Paulo University, Brazil
Interests: nuclear reactions; Monte Carlo method; hadron physics; high energy collisions; non-extensive statistic
Dr. Eugenio Megias
E-Mail Website
Guest Editor
Departamento de Física Atómica, Molecular y Nuclear and Instituto Carlos I de Física Teórica y Computacional, Universidad de Granada, Granada, Spain
Interests: hadron physics; QCD at finite temperature; transport properties; quak–gluon plasma; AdS/CFT
Prof. Dr. Igor M. Dremin
E-Mail Website
Guest Editor
Theory Department, Lebedev Physics Institute of the Russian Academy of Sciences, 117924 Moscow, Russia
Interests: hadron interactions; multiparticle production; cosmic-ray physics; fractals; quantum chromodynamics; phase transitions; heavy quarkonia spectroscopy; low-x physics; wavelet analysis and its applications; pattern recognition
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The vast amount of data from high energy collisions has opened up an opportunity toward further understanding of fundamental aspects in high-energy physics, in particular of the nonperturbative regime of quantum chromodynamics (QCD), the theory of strong interactions. Many phenomenological and theoretical approaches have been formulated for accurate description of the strongly interacting matter where a complex system of excited matter is formed, in order to understand its evolution, hadronization, and freeze-out.

The hydrodynamics approach to quark–gluon plasma expansion, the saturation model of color glass condensate, and the hadron resonance gas models are some examples of successful approaches to comprehensive description of the hot and dense system formed in high energy collisions. Statistical methods have been found to be valuable in understanding those mechanisms and to help with building the nonperturbative QCD sector.

In this Special Issue, we invite research in the field to present the state-of-the-art of statistical approaches in high energy physics, in particular in the QCD at extreme conditions, hadroproduction, and hot and dense nuclear matter formation.

Prof. Dr. Edward Sarkisyan-Grinbaum
Prof. Dr. Airton Deppman
Dr. Eugenio Megias
Prof. Igor M. Dremin
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Physics is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nonperturbative QCD
  • hadronic matter
  • multihadron production
  • quak–gluon plasma
  • statistical methods
  • complex systems

Published Papers (6 papers)

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Research

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Article
Statistical Scrutiny of Particle Spectra in ep Collisions
Physics 2021, 3(3), 757-780; https://0-doi-org.brum.beds.ac.uk/10.3390/physics3030047 - 08 Sep 2021
Viewed by 325
Abstract
Charged particle multiplicity distributions in positron–proton deep inelastic scattering at a centre-of-mass energy s = 300 GeV, measured in the hadronic centre-of-mass frames and in different pseudorapidity windows are studied in the framework of two statistical distributions, the shifted Gompertz distribution and the [...] Read more.
Charged particle multiplicity distributions in positron–proton deep inelastic scattering at a centre-of-mass energy s = 300 GeV, measured in the hadronic centre-of-mass frames and in different pseudorapidity windows are studied in the framework of two statistical distributions, the shifted Gompertz distribution and the Weibull distribution. Normalised moments, normalised factorial moments and the H-moments of the multiplicity distributions are determined. The phenomenon of oscillatory behaviour of the counting statistics and the Koba-Nielsen-Olesen (KNO) scaling behaviour are investigated. This is the first such analysis using these data. In addition, projections of the two distributions for the expected average charged multiplicities obtainable at the proposed future ep colliders. Full article
(This article belongs to the Special Issue Statistical Approaches in High Energy Physics)
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Article
A Baseline Study of the Event-Shape and Multiplicity Dependence of Chemical Freeze-Out Parameters in Proton-Proton Collisions at \( {\sqrt{s}} \) = 13 TeV Using PYTHIA8
Physics 2020, 2(4), 679-694; https://0-doi-org.brum.beds.ac.uk/10.3390/physics2040040 - 10 Dec 2020
Cited by 1 | Viewed by 971
Abstract
The event-shape and multiplicity dependence of the chemical freeze-out temperature (Tch), freeze-out radius (R), and strangeness saturation factor (γs) are obtained by studying the particle yields from the PYTHIA8 Monte Carlo event generator in proton-proton [...] Read more.
The event-shape and multiplicity dependence of the chemical freeze-out temperature (Tch), freeze-out radius (R), and strangeness saturation factor (γs) are obtained by studying the particle yields from the PYTHIA8 Monte Carlo event generator in proton-proton (pp) collisions at the centre-of-mass s = 13 TeV. Spherocity is one of the transverse event-shape techniques to distinguish jetty and isotropic events in high-energy collisions and helps in looking into various observables in a more differential manner. In this study, spherocity classes are divided into three categories, namely (i) spherocity integrated, (ii) isotropic, and (iii) jetty. The chemical freeze-out parameters are extracted using a statistical thermal model as a function of the spherocity class and charged particle multiplicity in the canonical, strangeness canonical, and grand canonical ensembles. A clear observation of the multiplicity and spherocity class dependence of Tch, R, and γs is observed. A final state multiplicity, Nch 30 in the forward multiplicity acceptance of the ALICE detector appears to be a thermodynamic limit, where the freeze-out parameters become almost independent of the ensembles. This study plays an important role in understanding the particle production mechanism in high-multiplicity pp collisions at the Large Hadron Collider (LHC) energies in view of a finite hadronic phase lifetime in small systems. Full article
(This article belongs to the Special Issue Statistical Approaches in High Energy Physics)
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Article
Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs
Physics 2020, 2(4), 654-664; https://0-doi-org.brum.beds.ac.uk/10.3390/physics2040038 - 04 Dec 2020
Cited by 4 | Viewed by 997
Abstract
We present an overview of a proposal in relativistic proton-proton (pp) collisions emphasizing the thermal or kinetic freeze-out stage in the framework of the Tsallis distribution. In this paper we take into account the chemical potential present in the Tsallis [...] Read more.
We present an overview of a proposal in relativistic proton-proton (pp) collisions emphasizing the thermal or kinetic freeze-out stage in the framework of the Tsallis distribution. In this paper we take into account the chemical potential present in the Tsallis distribution by following a two step procedure. In the first step we used the redudancy present in the variables such as the system temperature, T, volume, V, Tsallis exponent, q, chemical potential, μ, and performed all fits by effectively setting to zero the chemical potential. In the second step the value q is kept fixed at the value determined in the first step. This way the complete set of variables T,q,V and μ can be determined. The final results show a weak energy dependence in pp collisions at the centre-of-mass energy s=20 TeV to 13 TeV. The chemical potential μ at kinetic freeze-out shows an increase with beam energy. This simplifies the description of the thermal freeze-out stage in pp collisions as the values of T and of the freeze-out radius R remain constant to a good approximation over a wide range of beam energies. Full article
(This article belongs to the Special Issue Statistical Approaches in High Energy Physics)
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Article
Searching for Supersymmetry at LHC Using the Complex-Network-Based Method of the Three-Dimensional Visibility-Graph
Physics 2020, 2(3), 436-454; https://0-doi-org.brum.beds.ac.uk/10.3390/physics2030025 - 10 Sep 2020
Viewed by 914
Abstract
For the last several decades, there has been tremendous interest in search for Supersymmetry (SUSY) in the area of high energy physics. At Large Hadron Collider (LHC), there have been continuous searches for SUSY for prompt and non-prompt, for particle R-parity conserving [...] Read more.
For the last several decades, there has been tremendous interest in search for Supersymmetry (SUSY) in the area of high energy physics. At Large Hadron Collider (LHC), there have been continuous searches for SUSY for prompt and non-prompt, for particle R-parity conserving and R-parity violating generation and decays. The limits obtained from these experiments and analyses for detection of the signatures of supersymmetric particles (LSP), revealed greater possibilities of such experiments in the collider. However, these signatures are usually derived under the assumption of bit optimistic conditions of the decaying process of sparticles to the final states. Moreover, SUSY might have been in a disguised state at lower mass-scales as a result of difficult and challenging mass spectra and mixed modes of decays. In this investigation, a novel method of 3-dimensional (3D) Visibility-Graph Analysis is proposed. This is an extension of Visibility Graph analysis of data series to perform the scaling analysis for 3D space. The experimental data spaces analyzed are made up of the component-space (in the X,Y and Z coordinates) of transverse momentum (pT) values taken out from 4-momenta of the signatures of the final state of the pair of mega-jets extracted from the multiJet primary pp collision data from Run B of 2010 at 7 TeV which was used for the search of SUSY using razor filter. The symmetry scaling and the inherent scaling behavior, scale-freeness of multi-particle production process is studied in terms of 3D Power-of-Scale-freeness-of-Visibility-Graph (3D-PSVG) extracted from the 3D Visibility Graphs constructed out of the experimental data spaces. The signature of SUSY may be identified by analyzing the scaling behavior and long-range correlation inherent in the 3D space made up of signatures of final state of multi-particles produced in the pp collision at 7 TeV, for the analysis of SUSY, which the conventional method of analyzing the spectrum of invariant mass or pT may miss. Full article
(This article belongs to the Special Issue Statistical Approaches in High Energy Physics)
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Article
Kinetic Freeze-Out Properties from Transverse Momentum Spectra of Pions in High Energy Proton-Proton Collisions
Physics 2020, 2(2), 277-308; https://0-doi-org.brum.beds.ac.uk/10.3390/physics2020015 - 12 Jun 2020
Cited by 5 | Viewed by 1254
Abstract
Transverse momentum spectra of negative and positive pions produced at mid-(pseudo)rapidity in inelastic or non-single-diffractive proton-proton collisions over a center-of-mass energy, s, range from a few GeV to above 10 TeV are analyzed by the blast-wave fit with Boltzmann (Tsallis) distribution. The [...] Read more.
Transverse momentum spectra of negative and positive pions produced at mid-(pseudo)rapidity in inelastic or non-single-diffractive proton-proton collisions over a center-of-mass energy, s , range from a few GeV to above 10 TeV are analyzed by the blast-wave fit with Boltzmann (Tsallis) distribution. The blast-wave fit results are well fitting to the experimental data measured by several collaborations. In a particular superposition with Hagedorn function, both the excitation functions of kinetic freeze-out temperature ( T 0 ) of emission source and transverse flow velocity ( β T ) of produced particles obtained from a given selection in the blast-wave fit with Boltzmann distribution have a hill at s 10 GeV, a drop at dozens of GeV, and then an increase from dozens of GeV to above 10 TeV. However, both the excitation functions of T 0 and β T obtained in the blast-wave fit with Tsallis distribution do not show such a complex structure, but a very low hill. In another selection for the parameters or in the superposition with the usual step function, T 0 and β T increase generally quickly from a few GeV to about 10 GeV and then slightly at above 10 GeV, there is no such the complex structure, when also studying nucleus-nucleus collisions. Full article
(This article belongs to the Special Issue Statistical Approaches in High Energy Physics)
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Review

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Review
Fractal Structures of Yang–Mills Fields and Non-Extensive Statistics: Applications to High Energy Physics
Physics 2020, 2(3), 455-480; https://0-doi-org.brum.beds.ac.uk/10.3390/physics2030026 - 10 Sep 2020
Cited by 8 | Viewed by 1598
Abstract
In this work, we provide an overview of the recent investigations on the non-extensive Tsallis statistics and its applications to high energy physics and astrophysics, including physics at the Large Hadron Collider (LHC), hadron physics, and neutron stars. We review some recent investigations [...] Read more.
In this work, we provide an overview of the recent investigations on the non-extensive Tsallis statistics and its applications to high energy physics and astrophysics, including physics at the Large Hadron Collider (LHC), hadron physics, and neutron stars. We review some recent investigations on the power-law distributions arising in high energy physics experiments focusing on a thermodynamic description of the system formed, which could explain the power-law behavior. The possible connections with a fractal structure of hadrons is also discussed. The main objective of the present work is to delineate the state-of-the-art of those studies and show some open issues that deserve more careful investigation. We propose several possibilities to test the theory through analyses of experimental data. Full article
(This article belongs to the Special Issue Statistical Approaches in High Energy Physics)
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