scholarly journals Hadron production in pp and AA collisions at mid-rapidity within self-similarity approach

2019 ◽  
Vol 204 ◽  
pp. 01022 ◽  
Author(s):  
Gennady Lykasov ◽  
Alexander Malakhov
Keyword(s):  
Experimental Data ◽  
Transverse Momentum ◽  
Hadron Production ◽  
The Self ◽  
Self Similarity ◽  
Satisfactory Description ◽  
Self Consistent ◽  
Consistent Approach ◽  
Aa Collisions

The self-consistent approach based on similarity of inclusive spectra of hadrons produced in pp and AA collisions is reviewed. We present its modification due to the quark-gluon dynamics to describe the inclusive spectra of hadrons produced in pp collision as a function of the transverse momentum pt at mid-rapidity. The extension of this approach to analyze the pion pt-spectra produced in AA collision at high and middle energies and mid-rapidity is given. A satisfactory description of experimental data on these spectra in pp and AA collisions within the offered approach is shown.

scholarly journals Self-similarity of hadron production in pp and AA collisions at high energies

2015 ◽  
Vol 30 (21) ◽  
pp. 1550127 ◽  
Author(s):  
D. A. Artemenkov ◽  
G. I. Lykasov ◽  
A. I. Malakhov
Keyword(s):  
Hadron Production ◽  
The Self ◽  
Pp Collisions ◽  
Self Similarity ◽  
High Energies ◽  
Wide Range ◽  
Aa Collisions

We analyze the self-similarity approach applied to study the hadron production in pp and AA collisions. This approach allows us to describe rather well the ratio of the proton to antiproton yields in AA collisions as a function of the energy at a wide range from a few GeV to a few TeV. We suggest a modification of this approach to describe rather well the inclusive spectra of hadrons produced in pp collisions at different initial energies from the AGS to LHC.

scholarly journals ROLE OF GLUONS IN SOFT AND SEMI-HARD MULTIPLE HADRON PRODUCTION IN pp COLLISIONS AT LHC

2012 ◽  
Vol 27 (08) ◽  
pp. 1250042 ◽  
Author(s):  
V. A. BEDNYAKOV ◽  
A. A. GRINYUK ◽  
G. I. LYKASOV ◽  
M. POGHOSYAN
Keyword(s):  
String Model ◽  
Hadron Production ◽  
The Self ◽  
Transverse Motion ◽  
Pp Collisions ◽  
Satisfactory Description ◽  
Central Rapidity Region ◽  
Central Rapidity ◽  
Self Consistent

Hadron inclusive spectra in pp collisions are analyzed within the modified quark–gluon string model including both the longitudinal and transverse motion of quarks in the proton in the wide region of initial energies. The self-consistent analysis shows that the experimental data on the inclusive spectra of light hadrons like pions and kaons at ISR energies can be satisfactorily described at transverse momenta not larger than 1–2 GeV /c. We discuss some difficulties to apply this model at energies above the ISR and suggest to include the distribution of gluons in the proton unintegrated over the internal transverse momentum. It leads to an increase in the inclusive spectra of hadrons and allows us to extend the satisfactory description of the data in the central rapidity region at energies higher than ISR.

Models prediction of hadrons production ratios in pp collisions at s = 7 TeV

2019 ◽  
Vol 34 (13) ◽  
pp. 1950090 ◽  
Author(s):  
M. Ajaz ◽  
M. Bilal ◽  
Y. Ali ◽  
M. K. Suleymanov ◽  
K. H. Khan
Keyword(s):  
Experimental Data ◽  
Transverse Momentum ◽  
Charged Particles ◽  
Hadron Production ◽  
Proton Proton ◽  
Proton Collisions ◽  
Particle Ratios ◽  
Production Models ◽  
Lhcb Detector ◽  
Proton Proton Collisions

The pseudorapidity [Formula: see text] dependence of charged-particles ratios in three transverse momentum [Formula: see text] regions, obtained by hadron production models, in proton–proton collisions at 7 TeV are compared with the measurements of LHCb detector. Compared to the experimental data, the [Formula: see text] ratios are independent of [Formula: see text] and [Formula: see text] and are very well predicted by all models (DPMJETIII, EPOS1.99, EPOS-LHC, HIJING1.383, QGSJETII-04 and Sibyll2.3c). All models predict the [Formula: see text] ratio at low [Formula: see text] for [Formula: see text], but underestimate afterward while reproducing the experimental data at medium and high [Formula: see text] very well. The [Formula: see text] ratio is described by the models very well at high [Formula: see text] in the low and medium [Formula: see text] region. At high [Formula: see text], models predict the experimental data well, except Sibyll2.3c that slightly overestimates. The [Formula: see text] ratio is predicted by EPOS1.99, HIJING and Sibyll at low [Formula: see text] and EPOS-LHC, EPOS1.99 and Sibyll predicted at high [Formula: see text] for low [Formula: see text]. For medium [Formula: see text], EPOS1.99 and Sibyll predict very well for [Formula: see text] while EPOS-LHC and HIJING models reproduce the data for [Formula: see text]. All models underpredict the [Formula: see text] ratio for [Formula: see text]. For the [Formula: see text] and [Formula: see text] ratios, only Sibyll and EPOS1.99 models could reproduce some regions of [Formula: see text] and [Formula: see text]. None of the models satisfactorily predict all the ratios. the same particle ratios are well described by most of the models while the discrepancies occur mostly in predicting the different particles ratios.

Application of Visco-Plastic Self Consistent Approach to Model Deformation Characteristics of Magnesium with Different Textures

2011 ◽  
Vol 702-703 ◽  
pp. 80-84
Author(s):  
Apu Sarkar ◽  
J.K. Chakravartty
Keyword(s):  
Experimental Data ◽  
Experimental Evidence ◽  
Uniaxial Tensile ◽  
Deformation Characteristics ◽  
Self Consistent ◽  
Plastic Forming ◽  
Constitutive Response ◽  
Low Symmetry ◽  
Consistent Approach ◽  
Good Agreement

The viscoplastic self-consistent (VPSC) formulation is by now a well established approach for simulating texture development and constitutive response during plastic forming of high and low-symmetry polycrystals. In this work we have used the VPSC approach to model the uniaxial tensile and compressive deformation characteristics of pure magnesium with random and extruded texture. We compare our results with experimental data and find that they are in good agreement with the available experimental evidence.

scholarly journals A self-consistent approach to describe unit-cell-parameter and volume variations with pressure and temperature

2021 ◽  
Vol 54 (6) ◽  
Author(s):  
Ross Angel ◽  
Mattia Mazzucchelli ◽  
Javier Gonzalez-Platas ◽  
Matteo Alvaro
Keyword(s):  
Cell Parameter ◽  
Equations Of State ◽  
Unit Cell ◽  
The Self ◽  
Polynomial Functions ◽  
Unit Cell Parameters ◽  
Cell Parameters ◽  
Self Consistent ◽  
Consistent Manner ◽  
Consistent Approach

A method for the self-consistent description of the large variations of unit-cell parameters of crystals with pressure and temperature is presented. It employs linearized versions of equations of state (EoSs) together with constraints to ensure internal consistency. The use of polynomial functions to describe the variation of the unit-cell angles in monoclinic and triclinic crystals is compared with the method of deriving them from linearized EoSs for d spacings. The methods have been implemented in the CrysFML Fortran subroutine library. The unit-cell parameters and the compressibility and thermal expansion tensors of crystals can be calculated from the linearized EoSs in an internally consistent manner in a new utility in the EosFit7c program, which is available as freeware at http://www.rossangel.net.

Phonon Anharmonicity and Thermodynamic Properties of Strongly Correlated Iron Monosilicide

2016 ◽  
Vol 257 ◽  
pp. 203-210 ◽  
Author(s):  
Aleksandr A. Povzner ◽  
Anton N. Filanovich ◽  
Tatyana A. Nogovitsyna
Keyword(s):  
Experimental Data ◽  
Thermodynamic Properties ◽  
Thermodynamic Model ◽  
Ground State ◽  
The Self ◽  
Strongly Correlated ◽  
Optical Phonons ◽  
Computational Approaches ◽  
Self Consistent ◽  
Iron Monosilicide

Two computational approaches – a thermodynamic model based on results of ab initio calculations of the ground state and the self-consistent thermodynamic model have been applied to study thermal and elastic properties of iron monosilicide. It is shown that conventional DFT fails to reproduce experimental data for this strongly correlated compound. In addition, we have performed comparative analysis of anharmonicity of the acoustic and optical phonons in FeSi and their impact on the temperature dependencies of thermodynamic properties of FeSi.

scholarly journals Self-consistent account for phonon induced corrections to quadrupole moments of odd nuclei. Pole and non-pole diagrams.

2018 ◽  
Vol 182 ◽  
pp. 02109
Author(s):  
E. E. Saperstein ◽  
S. Kamerdzhiev ◽  
D. S. Krepish ◽  
S. V. Tolokonnikov ◽  
D. Voitenkov
Keyword(s):  
Experimental Data ◽  
Magnetic Moments ◽  
Lead Isotopes ◽  
The Self ◽  
Quadrupole Moments ◽  
Important Ingredient ◽  
Consistent Theory ◽  
Fermi Systems ◽  
Consistent Model ◽  
Self Consistent

Recent results of the description of quadrupole moments of odd semi-magic nuclei are briefly reviewed. They are based on the self-consistent theory of finite Fermi systems with account for the phonon-particle coupling (PC) effects. The self-consistent model for describing the PC effects was developed previously for magnetic moments. Account for the non-pole diagrams is an important ingredient of this model. In addition to previously reported results for the odd In and Sb isotopes, which are the proton-odd neighbors of even tin nuclei, we present new results for odd Bi isotopes, the odd neighbors of even lead isotopes. In general, account for the PC corrections makes the agreement with the experimental data significantly better.

Sign in / Sign up

Export Citation Format

Share Document