scholarly journals Investigating the inclusive transverse spectra in high-energy pp collisions in the context of geometric scaling framework

2020 ◽  
Vol 102 (3) ◽  
Author(s):  
L. S. Moriggi ◽  
G. M. Peccini ◽  
M. V. T. Machado
Keyword(s):  
High Energy ◽  
Pp Collisions ◽  
Geometric Scaling

Geometric scaling in high-energy elastic and inelastic pp collisions

1975 ◽  
Vol 13 (15) ◽  
pp. 591-596 ◽  
Author(s):  
A. N. Kamal ◽  
R. Torgerson
Keyword(s):  
High Energy ◽  
Pp Collisions ◽  
Geometric Scaling

scholarly journals Charge and Isospin Fluctuations in High Energy pp-Collisions

2005 ◽  
pp. 163-167
Author(s):  
Mladen Martinis ◽  
Vesna Mikuta-Martinis
Keyword(s):  
High Energy ◽  
Pp Collisions

A two-component model for hadron production in high-energy pp collisions

1985 ◽  
Vol 89 (4) ◽  
pp. 353-380 ◽  
Author(s):  
H. Banerjee ◽  
T. De ◽  
D. Syam
Keyword(s):  
High Energy ◽  
Hadron Production ◽  
Component Model ◽  
Pp Collisions ◽  
Two Component

scholarly journals Extending the Fully Bayesian Unfolding with Regularization Using a Combined Sampling Method

Symmetry ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2100
Author(s):  
Petr Baroň ◽  
Jiří Kvita
Keyword(s):  
Sampling Method ◽  
High Energy ◽  
Computational Time ◽  
Strength Parameter ◽  
Pp Collisions ◽  
Quark Pairs ◽  
Optimal Value ◽  
Particle Level ◽  
Fully Bayesian

Regularization extensions to the Fully Bayesian Unfolding are implemented and studied with an algorithm of combined sampling to find, in a reasonable computational time, an optimal value of the regularization strength parameter in order to obtain an unfolded result of a desired property, like smoothness. Three regularization conditions using the curvature, entropy and derivatives are applied, as a model example, to several simulated spectra of top-pair quark pairs that are produced in high energy pp collisions. The existence of a minimum of a χ2 between the unfolded and particle-level spectra is discussed, with recommendations on the checks and validity of the usage of the regularization feature in Fully Bayesian Unfolding (FBU).

scholarly journals (Anti-)deuteron production in pp collisions at $$\sqrt{s}=13 \ \text {TeV}$$

2020 ◽  
Vol 80 (9) ◽  
Author(s):  
S. Acharya ◽  
◽  
D. Adamová ◽  
A. Adler ◽  
J. Adolfsson ◽  
...  
Keyword(s):  
Charged Particle ◽  
Formation Mechanism ◽  
Bound States ◽  
High Energy ◽  
Light Nuclei ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity ◽  
Pp Collisions ◽  
Alice Experiment ◽  
Deuteron Production

AbstractThe study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of $$\text {(anti-)deuterons}$$ (anti-)deuterons is studied as a function of the charged particle multiplicity in inelastic pp collisions at $$\sqrt{s}=13$$ s = 13 TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity ($${\mathrm {d} N_{ch}/\mathrm {d} \eta } \sim 26$$ d N ch / d η ∼ 26 ) as measured in p–Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p–Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM).

scholarly journals The energy dependence of antiparticle to particle ratios in high energy pp collisions

2014 ◽  
Vol 23 (12) ◽  
pp. 1450088
Author(s):  
Wang Jiang-Ling ◽  
Li Di-Kai ◽  
Li Hai-Jun ◽  
Chen Gang
Keyword(s):  
Phase Space ◽  
Transverse Momentum ◽  
Energy Dependence ◽  
Preliminary Data ◽  
High Energy ◽  
Pp Collisions ◽  
Average Transverse Momentum ◽  
Significant Dependence ◽  
Particle Ratios ◽  
200 Gev

The energy dependence of the ratio for antiparticle to particle in pp collisions of high energy is studied using the parton and hadron cascade and dynamically constrained phase-space coalescence models. The yield ratios of antimatter and matter for different masses are measured at various c.m energies. It is found that the yield ratios of antimatter and matter increase with the increase of the c.m energy of pp collisions until they gradually approach to 1 after the c.m energy is more than 200 GeV. The distribution of transverse momentum also has significant dependence on the energy and mass, i.e., the average transverse momentum increases when the c.m energy of pp collisions increase. The model results are compatible with the STAR and ALICE preliminary data.

scholarly journals GEOMETRIC SCALING IN ULTRAHIGH ENERGY NEUTRINOS AND NONLINEAR PERTURBATIVE QCD

2011 ◽  
Vol 20 (supp01) ◽  
pp. 189-194
Author(s):  
MAGNO V. T. MACHADO
Keyword(s):  
Evolution Equations ◽  
High Energy ◽  
Ultrahigh Energy ◽  
Neutrino Scattering ◽  
Neutrino Telescopes ◽  
High Energies ◽  
Scaling Property ◽  
Energy Neutrino ◽  
Geometric Scaling ◽  
Crucial Ingredient

The ultrahigh energy neutrino cross section is a crucial ingredient in the calculation of the event rate in high energy neutrino telescopes. Currently there are several approaches which predict different behaviors for its magnitude for ultrahigh energies. In this contribution is presented a summary of current predictions based on the non-linear QCD evolution equations, the so-called perturbative saturation physics. In particular, predictions are shown based on the parton saturation approaches and the consequences of geometric scaling property at high energies are discussed. The scaling property allows an analytical computation of the neutrino scattering on nucleon/nucleus at high energies, providing a theoretical parameterization.

scholarly journals Tsallis Statistics in High Energy Physics: Chemical and Thermal Freeze-Outs

Physics ◽  
2020 ◽  
Vol 2 (4) ◽  
pp. 654-664
Author(s):  
Jean Cleymans ◽  
Masimba Wellington Paradza
Keyword(s):  
High Energy Physics ◽  
Chemical Potential ◽  
High Energy ◽  
Pp Collisions ◽  
Proton Proton ◽  
Wide Range ◽  
Relativistic Proton ◽  
System Temperature ◽  
Tsallis Distribution ◽  
Freeze Out

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.

NATURE OF ANTIPROTON PRODUCTION IN HIGH ENERGY NUCLEAR COLLISIONS: ASSORTED DATA VERSUS SPECIFIC MODELS

2002 ◽  
Vol 17 (08) ◽  
pp. 1159-1173 ◽  
Author(s):  
P. GUPTAROY ◽  
D. P. BHATTACHARYYA ◽  
BHASKAR DE ◽  
S. BHATTACHARYYA
Keyword(s):  
High Energy ◽  
Pp Collisions ◽  
Nuclear Collisions ◽  
Production Processes ◽  
Nuclear Interactions ◽  
Antiproton Production ◽  
Aa Collisions

We attempt here to deal with some of the important characteristics of secondary antiproton production in various high energy nuclear interactions on the basis of a model for production of particles in PP collisions. The results have, thereafter, been converted to those for AA collisions through an appropriate mechanism. The effect of rescattering and cascading in the production processes and on the chosen models has also been incorporated in a phenomenological manner. Comparison of the calculated results with data on the relevant observables leads to a striking agreement and this fair success is claimed here to obviously signal the strength of the basic models that are applied in the present work.

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