Self-similarity of low-p T cumulative pion production in proton-nucleus collisions at high energies

Experimental data on transverse momentum spectra of strange particles [Formula: see text] produced in [Formula: see text] collisions at [Formula: see text] obtained by the STAR and PHENIX collaborations at RHIC are analyzed in the framework of [Formula: see text]-scaling approach. The concept of the [Formula: see text]-scaling is based on fundamental principles of self-similarity, locality, and fractality of hadron interactions at high energies. General properties of the data [Formula: see text]-presentation are studied. Self-similarity of fractal structure of protons and fragmentation processes with strange particles is discussed. A microscopic scenario of constituent interactions developed within the [Formula: see text]-scaling scheme is used to study the dependence of momentum fractions and recoil mass on the collision energy, transverse momentum and mass of produced inclusive particle, and to estimate the constituent energy loss. We consider that obtained results can be useful in study of strangeness origin, in searching for new physics with strange probes, and can serve for better understanding of fractality of hadron interactions at small scales.

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

International Journal of Modern Physics A ◽

10.1142/s0217751x15501274 ◽

2015 ◽

Vol 30 (21) ◽

pp. 1550127 ◽

Cited By ~ 10

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.

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Collision centrality dependencies of charged pion production in 12C+ 181 Ta collisions at 4.2 A GeV/c

International Journal of Modern Physics E ◽

10.1142/s0218301318500921 ◽

2018 ◽

Vol 27 (11) ◽

pp. 1850092 ◽

Cited By ~ 1

Author(s):

Akhtar Iqbal ◽

Khusniddin K. Olimov ◽

Kosim Olimov ◽

Mushtaq Ahmad ◽

Sh. Z. Kanokova ◽

...

Keyword(s):

Simple Model ◽

Pion Production ◽

Charged Pion ◽

Heavy Ion ◽

Emission Angle ◽

Collision System ◽

High Energies ◽

Collision Centrality ◽

Ion Collisions ◽

Charged Pions

The collision centrality dependencies of the average kinematical characteristics of the negative and positive pions, produced in [Formula: see text] collisions at [Formula: see text], were investigated. The ratio [Formula: see text] proved to be [Formula: see text], [Formula: see text] and [Formula: see text] in the peripheral, semicentral, and central [Formula: see text] collision events, respectively, decreasing noticeably with increasing collision centrality. The suppression (decrease) of the ratio [Formula: see text] was observed in the semicentral and central [Formula: see text] collisions as compared to the ratio [Formula: see text], estimated using the simple model for [Formula: see text] collision system. The ratio [Formula: see text] estimated using the simple model agreed well with the corresponding ratio [Formula: see text], estimated for [Formula: see text] collisions at [Formula: see text] based on the Wounded Nucleon Model (WNM). Comparison of the emission angle as well as momentum distributions of the charged pions in the peripheral and central [Formula: see text] collisions revealed the significant decrease of the fraction of the relatively fast charged pions (with smaller emission angles) and increase of the fraction of the relatively slow charged pions (with larger emission angles) with an increase in collision centrality. The results of the present analysis can be useful for analysis of the centrality dependence of the charged pion production in heavy ion collisions at high energies.

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