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O. I. Piskounova

Publications and source records attributed to O. I. Piskounova.

15 recordsLinked to original sources
arXiv2025

Baryonium Dark Matter: Events with Circle Configurations in the Atmosphere and on the Surface of Earth

This research supposes the parallel study of the manifestations of Baryonium Dark Matter (BDM) in astroparticle collisions in the atmosphere and among the footprints of the massive extraterrestrial objects that fall on the surface of Earth. These objects differ from stone asteroids and are seen as lightning bolides that are burning with a blue flame. Since BDM is a QCD state, the characteristics of BDM disintegration events can be analyzed with the same Quark-Gluon Strings Model (QGSM) as hadroproproduction data on colliders. It was concluded that the HE event, which was detected in the stratosphere in 1975, differs from the collision of the nucleus. The signatures of such events are 1) the circle distribution of heavy secondary hadrons with almost nothing inside the ring and 2) the presence of heavy secondary particles with a mass out of range of known hadrons. The circle will also be the signature of heavy BDM conglomerate that disintegrate in the atmosphere (or in space) for a few similar lower-mass BDMs. These signatures should be observed in super-heavy BDM collapses on the Earth. The traces of such events are seen as circles of pits or shafts in the ground rocks. There are at least two pieces of evidence of such holes: cenotes on the Yucatan peninsula (Mexico) and pits in Durrington Walls (England). The vertical pits, or wells (because sometimes they are filled with water) have a depth of 5 - 50 meters. These super-heavy BDM collapses differ from the meteorite crash, because they do not form the craters. The existence of these places around the globe indicates the rare likelihood of meeting the super-massive BDM in proximity to Earth. The Tunguska meteorite could also be a BDM collapse. Finally, some suggestions are made about the emission of Baryonium Dark Matter toroidal conglomerates with the jets from giant active Supermassive Black Holes (SMBH).

hep-ph↗
arXiv2025

High Energy Proton-Proton collisions and Baryonium Dark Matter

The positive hyperon production asymmetries that have been measured at LHC are real demonstrations of string junction role in the baryon charge transfer at baryon production in HE proton-proton interactions. In order to invent the neutral heavy particle with zero baryon charge as a candidate for Dark Matter, it is necessary to turn back to the times of dual topological unitarization of hadroproduction physics, where the pomeron exchanges play leading role with the growing energies. The topological presentation of pomeron exchange at the HE proton-proton collision is a cylinder that is covered with a quark-gluon net. Taking into account that the junction of three gluons (SJ) has the positive baryon number, as well as the antijunction (antiSJ) is of negative baryon charge, the neutral self-connected baryonium configuration with zero baryon charge is a torus that is covered by a discrete number of hexagons with 3 string junction and 3 antijunction vertices each. The possibilities to observ such baryonium tori are discussed in this paper for three cases: collisions at p-p collider, the cosmic particle collisions with the atmosphere, and in the relativistic jets at the Active Galaxy Nuclei as well.

hep-ph↗
arXiv2023

Triple-Pomeron Diffraction Peak as a Signature of UHE Proton-Initiated Spectra of Gammas and Neutrinos in Astrophysics

Production of ultra-high-energy (UHE) particles in astrophysics should not be different from the hadron production at the contemporary proton colliders. LHC experiments are providing us with the proton spectra at very high energy (VHE) that are measured in the center-of-mass system (c.m.s.). The proton spectrum in c.m.s. has two special features that are important at HE hadron collisions: the growing central-rapidity part with hadron-antihadron pair production and the valuable diffractive peak in the region of the leading proton due to the triple-pomeron term. The QCD phenomenological studies of previous years gave us the Quark-Gluon String Model for the calculations of baryon and meson production spectra in a full kinematical range of rapidities. The collider proton production spectrum was recalculated to the laboratory system of coordinates, which is natural for astrophysical observations. The specifics of collider distributions of protons are reflected in astrophysical spectra as the knee of cosmic proton spectrum and as the spectrum bulge at the UHE area in cosmic spectra of protons, neutrinos, and gamma-photons. They help us to conclude that the energy distribution of baryon production plays an important role in the production of UHE cosmic particles. The remarkable result of this approach is the estimation of maximal energy (Emax) of initial protons (and antiprotons) from the energy of knee in the proton spectrum that give us $E_{max} = 6*10^{12}$ GeV.

hep-ph↗
arXiv2022

Ultra-High Energy Proton-Proton Collision in the Laboratory System as the Source of Proton, Neutrino and Gamma Spectra in Astrophysics

This paper is dedicated to the study how HE particle spectra, which are measured in cosmic ray physics and astrophysics, are influenced by the specifics of collider spectrum of protons.LHC experiments are providing us with the proton spectra at very high energy (VHE) measured in center-of-mass system. A QCD phenomenological study of previous years gave us the Quark-Gluon String Model for the modeling of baryon and meson production spectra in full kinematical range from centrally produced hadrons up to very forward ones. In 1990, I have applied the method for the recalculation the collider distribution of neutral pions for the description of gamma spectrum from supernova that was measured in the laboratory system. Here, I used the same method. The main statement of this study is that the features of leading spectra of cosmic protons, neutrinos and gamma are to be formed already in first collision of UHE proton at the power source of cosmic particles. The specifics of collider spectrum of protons are as following: the growing distribution at the central rapidity's, which reflects in the "knee" of cosmic proton spectrum, and the triple-Pomeron peak at the end of c.m.s. spectrum that leads to the enhancements in spectra of leading cosmic protons, neutrinos, gamma-photons, and as I assume, positrons too. These conclusions desire for more experimental facts to be collected and new observations to be made.

hep-ph↗
arXiv2021

Rapidity Gaps in Double Diffraction Events at LHC and Baryon-anti Baryon Torus

The positive baryon-antibaryon production asymmetries that have been measured at LHC are real demonstrations of string junction dynamics in the proton-proton interactions of high energies. The topological presentation of pomeron exchange in the proton-proton collision of high energy is cylinder diagram that is covered with quark-gluon net. I assume that the process of double diffraction (DD) can be presented as a diagram of one pomeron exchange with the central loop of two pomeron cylinders, that is similar to the pomeron diagram with the handle or the pomeron torus. Taking into account that the junction of three gluons (SJ) has the positive baryon number, as well as the antijunction is of negative baryon charge, our pomeron construction can be covered by only a certain number of hexagons that are constructed of 3 string junction and 3 antijunction vertices each. It is reasonable to expect that the dynamics of rapidity gaps in DD should be determined by the number of hexagons on the surface of pomeron torus. Therefore, the gap distribution in DD events has some discrete structure in the region of large gaps. Moreover, the string-junction conglomerate could be released after DD interaction as a metastable particle. There is another multiparticle process with the pomeron loop configuration that gives an event with doubled multiplicity in the central rapidity gap. It corresponds to the cut along the pomeron loop. The events with the gap in DD as well as the events with doubled multiplicity, each go on the level of 1.2% of the inclusive production cross section.

hep-ph↗
arXiv2015

Transverse momentum distributions of baryons at LHC energies

Transverse momentum spectra of protons and anti-protons from RHIC ($\sqrt{s}$ = 62 and 200 GeV) and LHC experiments ($\sqrt{s}$= 0.9 and 7 TeV) have been considered. The data are fitted in the low $p_T$ region with the universal formula that includes the value of exponent slope as a main parameter. It is seen that the slope of low-$p_T$ distributions is changing with energy. This effect impacts on the energy dependence of average transverse momenta, which behaves approximately as $s^{0.06}$ that is similar to the previously observed behavior for $Λ^0$-baryon spectra. In addition, the available data on $Λ_c$ production from LHCb at $\sqrt{s}= 7$ TeV were also studied. The estimated average $ $ is bigger than this value for protons proportionally to masses. The preliminary dependence of hadron average transverse momenta on their masses at LHC energy is presented.

hep-ph↗
arXiv2012

The Difference Between Hyperon Transverse Momentum Distributions in Proton-Proton and Proton-Antiproton Collisions

The analysis of data on hyperon transverse momentum distributions, dN/dPt, that were gathered from various experiments (ISR, STAR, UA1, UA5 and CDF) reveals an important difference in the dynamics of multiparticle production in proton-proton vs. antiproton-proton collisions in the region of transverse momenta 0.3 GeV/c < Pt < 3 GeV/c. Hyperons produced with proton beams display the sharp exponential slope at low Pt, while spectra prodused with antiproton beam don't. Since LHC experiments have proton projectiles, the spectra of baryon production should seem "softer" in comparison to expectations, because the Monte Carlo simulations were based on the Tevatron antiproton-proton data. From the point of view of Quark-Gluon String Model, the most important contribution into the particle production spectra goes from antidiquark-diquark string fragmentation that exists only in the topological diagram for antiproton-proton collisions and is a very interesting object for investigation even at lower energies. This study may have an impact not only on interpretation of LHC results, but also on the cosmic ray physics and astrophysics, where the baryon contribution into matter-antimatter asymmetry is being studied.

hep-ph↗
arXiv2007

Interactions of Heavy Hadrons using Regge Phenomenology and the Quark Gluon String Model

The search for stable heavy exotic hadrons is a promising way to observe new physics processes at collider experiments. The discovery potential for such particles can be enhanced or suppressed by their interactions with detector material. This paper describes a model for the interactions in matter of stable hadrons containing an exotic quark of charges $\pm {1/3}e$ or $\pm {2/3}e$ using Regge phenomenology and the Quark Gluon String Model. The influence of such interactions on searches at the LHC is also discussed.

hep-ph↗
arXiv2007

Heavy Quarks: Summary Report

The present status of the heavy-quark production theory is critically reviewed in the first contribution. The second contribution summarises the present heavy flavour data from HERA and gives an outlook of what can be expected from HERA-II. The potential of the LHC experiments for charm and beauty physics is reviewed in the 3rd contribution. Then the relevance of saturation and small-x effects to heavy quark production at HERA and at the LHC are discussed. The non-perturbative aspects of heavy-quark fragmentation and their relevance to HERA and LHC are discussed in the next contribution. Finally, a comparison of different theoretical predictions for HERA and LHC based on different approaches is presented.

hep-ph↗
arXiv2006

Baryon charge transfer and production asymmetry between Lambda^0 and antiLambda^0 in hadron interactions

The predictions were done for asymmetry between production spectra of Lambda^0 and antiLambda^0 at the energy of LHC experiments. The value of A(s) should be situated in the band between two curves that are calculated in Quark-Gluon String Model with two possible values of intercept alpha_{SJ}(0)=0,5 and 0,9. Both curves describe the asymmetries measured at lower energies up to RHIC experiments. The data of H1 experiment can be fitted only with alpha_{SJ}(0)=0,9.

hep-ph↗
arXiv2005

Production and Decay of Charmed Baryons: Spectra of Muons and Asymmetry between mu+ and mu-

The calculation of muon spectra from the decay of Lambda_c baryons was carried out on the basis of the description of recent data on charmed-baryon production in hadronic interactions. Data are described in the framework of Quark--Gluon String Model that allowes us to consider primary proton interactions of arbitrary high energy. MC code was built for charmed-baryon semileptonic decay in order to obtain the kinematical characteristics of resulting particles. It is predicted that the charge asymmetry between energy spectra of mu+ and mu- in laboratory system is clearly seen as the consequence of asymmetry between the spectra of charmed baryons and antibaryons.This extension of QGS Model can be useful to correct the calculations of muon and neutrino spectra in astrophysics.

hep-ph↗
arXiv2000

On the Character of Leading Asymmetry in the Hadroproduction of Charmed Mesons and Baryons

The character of asymmetry between the spectra of Lambda_c and antiLambda_c in the E781 experiment (FNAL) is discussed on the basis of the Quark Gluon String Model(QGSM). As it was shown in the description of the asymmetry between the spectra of leading and nonleading charmed mesons measured in Sigma^--A interactions at p_L= 340 GeV/c in the WA89 experiment in previous studies, the asymmetries between D^- and D^+ meson spectra and between D_s^- and D^+_s meson spectra can be fitted by QGSM curves with the same parameter of string fragmentation, a_1=10, as well as the asymmetry between the D-meson spectra in pion-nuclear collisions in the E791 experiment. The forms of Lambda_c/antiLambda_c asymmetry dependences measured in Sigma^-A and p-A collisions at p_L= 600 GeV/c in the E781 experiment are different . It is shown in the framework of QGSM that they depend on whether the diquarks of beam and target particles took part in charmed baryon formation or not. The QGSM results are compared with the calculations carried out by the other authors.

hep-ph↗
arXiv2000

B-meson hadroproduction cross sections and up-to-date models

The comparison of B-meson production cross sections as the results of PYTHIA code and Quark Gluon String Model (QGSM) is carried out for energies of proton colliders: $Sp\bar(p)S$, Tevatron and LHC. Model predictions are based on the theory of supercritical Pomeron exchanges with the phenomenological intercept $Δ_P$(0)=0.3, accepted for heavy quark production.Transverse momentum spectra of B-mesons are also compared. It is shown that the cross sections calculated with PYTHIA using CTEQ structure functions are in a contradiction with the asymptotical estimation of B$\bar{B}$ production cross sections in QGSM. Asymmetries between the spectra of $B^0$ and $\bar{B0}$ mesons are also contradicting. The reasons of the difference are discussed.

hep-ph↗
arXiv1995

Leading/nonleading Charm Hadroproduction in the Quark-Gluon String Model

Leading charm production in reaction $π^- N \rightarrow DX$ is discussed.Three experiments at Fermilab and CERN have measured a rather large enhancement in production rate of leading $D^-$-mesons over nonleading $D^+$.A good description of these results is obtained in Quark Gluon String Model (QGSM) if the idea of 'intrinsic charm' is involved. The weight of the $c\bar{c}$ pairs in the quark sea of colliding hadrons is estimated from the experimental data. The comparison with other theoretical models is also carried out.

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