A5050341839- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Statistical Mechanics and Entropy
- Stochastic processes and statistical mechanics
- Quantum, superfluid, helium dynamics
Jan Kochanowski University
2022-2025
University of Oslo
2020
Taras Shevchenko National University of Kyiv
2019-2020
Strong interactions preserve an approximate isospin symmetry between up (u) and down (d) quarks, part of the more general flavor symmetry. In case K meson production, if this were exact, it would result in equal numbers charged (K+ K−) neutral (K0 $${\overline{K}}^{0}$$ ) mesons produced collisions isospin-symmetric atomic nuclei. Here, we report results on relative abundance over production argon scandium nuclei at a center-of-mass energy 11.9 GeV per nucleon pair. We find that K+ K−...
Abstract This paper reports measurements of two-pion femtoscopic correlations in Be+Be collisions at a beam momentum 150 $$A\,\hbox {GeV}\!/\!c$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>A</mml:mi> <mml:mspace /> <mml:mtext>GeV</mml:mtext> <mml:mo>/</mml:mo> <mml:mi>c</mml:mi> </mml:mrow> </mml:math> (energy available the center-of-mass system for nucleon pair $$\sqrt{s_{\text {NN}}} = 16.84$$ <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi>...
Abstract The NA61/SHINE experiment at the CERN Super Proton Synchrotron studies onset of deconfinement in strongly interacting matter through a beam energy scan particle production collisions nuclei varied sizes. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions mean multiplicities $$\pi ^\pm $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>±</mml:mo> </mml:msup> </mml:math> ,...
We present a measurement of the momentum spectra ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${\mathrm{K}}^{\ifmmode\pm\else\textpm\fi{}}$, ${\mathrm{p}}^{\ifmmode\pm\else\textpm\fi{}}$, $\mathrm{\ensuremath{\Lambda}}$, $\overline{\mathrm{\ensuremath{\Lambda}}}$, and ${\mathrm{K}}_{\mathrm{S}}^{0}$ produced in interactions negatively charged pions with carbon nuclei at beam momenta 158 $350\text{ }\text{ }\mathrm{GeV}/c$. The total production cross sections are measured as well....
A good knowledge of nuclear fragmentation cross sections is important to interpret the fluxes secondary cosmic rays from Galaxy. Here we report new measurements with NA61/SHINE experiment at CERN SPS. The specific focus on for production boron in Galaxy interactions <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi mathvariant="normal">C</a:mi><a:mprescripts/><a:none/><a:mn>12</a:mn></a:mmultiscripts></a:math> nuclei hydrogen interstellar medium, including...
The production of $K^{0}_{S}$ mesons in inelastic $\textit{p+p}$ collisions at beam momentum 158 GeV/c ($\sqrt{s_{NN}}=17.3$ GeV) was measured with the NA61/SHINE spectrometer CERN Super Proton Synchrotron. Double-differential distributions were obtained transverse and rapidity. mean multiplicity determined to be $0.162 \pm 0.001 (stat.) 0.011 (sys.)$. results on are compared model predictions (EPOS 1.99, SMASH 2.0, PHSD UrQMD 3.4 models) as well published world data.
Abstract The critical point of strongly interacting matter is searched for at the CERN SPS by NA61/SHINE experiment in central $$^{40}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mmultiscripts> <mml:mrow/> <mml:mn>40</mml:mn> </mml:mmultiscripts> </mml:math> Ar + $$^{45}$$ <mml:mn>45</mml:mn> Sc collisions 13 A , 19 30 40 and 75 GeV/ c . dependence second-order scaled factorial moments proton multiplicity distributions on number subdivisions transverse momentum space...
This paper presents multiplicity measurements of ${K}_{\mathrm{S}}^{0}$, $\mathrm{\ensuremath{\Lambda}}$, and $\overline{\mathrm{\ensuremath{\Lambda}}}$ produced in $120\text{ }\text{ }\mathrm{GeV}/c$ proton-carbon interactions. The were made using data collected at the NA61/SHINE experiment during two different periods. Decays these neutral hadrons impact measured ${\ensuremath{\pi}}^{+}$, ${\ensuremath{\pi}}^{\ensuremath{-}}$, $p$ $\overline{p}$ multiplicities reaction, which are crucial...
The critical point of dense, strongly interacting matter is searched for at the CERN SPS in ${}^{40}$Ar + ${}^{45}$Sc collisions 150A GeV/c. dependence second-order scaled factorial moments proton multiplicity distribution on number subdivisions transverse momentum space measured. intermittency analysis performed using both and cumulative momentum. For first time, statistically independent data sets are used each subdivision number. obtained results do not indicate any significant pattern....
Time evolution of shear viscosity $\ensuremath{\eta}$, entropy density $s$, and their ratio $\ensuremath{\eta}/s$ in the central area gold-gold collisions at energies available Nuclotron-based Ion Collider fAcility (NICA) are studied within ultrarelativistic quantum molecular dynamics (UrQMD) transport model. The extracted values energy density, net baryon strangeness used as input to (i) statistical model an ideal hadron gas define temperature, baryochemical potential, chemical (ii) a UrQMD...
Measurements of $K^{*}(892)^0$ resonance production via its $K^{+}\pi^{-}$ decay mode in inelastic $p+p$ collisions at beam momenta 40 and 80 GeV/$c$ ($\sqrt{s_{NN}}=8.8$ 12.3 GeV) are presented. The data were recorded by the NA61/SHINE hadron spectrometer CERN Super Proton Synchrotron. \textit{template} method was used to extract signal. Transverse momentum rapidity spectra obtained. mean multiplicities mesons found be $(35.1 \pm 1.3 \mathrm{(stat)} 3.6 \mathrm{(sys)) \cdot 10^{-3}}$ $(58.3...
The production of backward nucleons, $N(180^\circ)$, at $180^\circ$ in the nuclear target rest frame proton-nucleus ($\mathrm{p}+A$) collisions is studied. nucleons appearing outside kinematically allowed range proton-nucleon ($\mathrm{p}+N$) reactions are shown to be due secondary heavy baryonic resonances produced inside nucleus. Baryonic $R$ created primary $\mathrm{p}+N$ can change their masses and momenta successive $R+N\rightarrow R +N $ with other nucleons. Two distinct mechanisms...
This paper reports measurements of two-pion Bose-Einstein (HBT) correlations in Be+Be collisions at a beam momentum 150$A\,\mbox{GeV}/\textit{c}$ by the $\mbox{NA61/SHINE}$ experiment CERN SPS accelerator. The obtained space correlation functions can be well described L\'evy distributed source model. transverse mass dependence parameters is presented, and their possible theoretical interpretations are discussed. results show that exponent $\alpha$ approximately constant as function...
This paper presents multiplicity measurements of charged hadrons produced in 120 GeV/c proton-carbon interactions. The were made using data collected at the NA61/SHINE experiment during two different data-taking periods, with increased phase space coverage second configuration due to addition new subdetectors. Particle identification via dE/dx was employed obtain double-differential production multiplicities π+, π−, p, p¯, K+, and K−. These are presented as a function laboratory momentum...
Abstract The critical point of dense, strongly interacting matter is searched for at the CERN SPS in 40 Ar + 45 Sc collisions 150 A Ge V / c . dependence second-order scaled factorial moments proton multiplicity distribution on number subdivisions transverse momentum space measured. intermittency analysis performed using both and cumulative momentum. For first time, statistically independent data sets are used each subdivision number. obtained results do not indicate any significant pattern....
The critical point of strongly interacting matter is searched for at the CERN SPS by NA61/SHINE experiment in central $^{40}$Ar +$^{45}$Sc collisions 13$A$, 19$A$, 30$A$, 40$A$, and 75$A$ GeV/$c$. dependence second-order scaled factorial moments proton multiplicity distributions on number subdivisions transverse momentum space measured. intermittency analysis uses statistically independent data sets every subdivision cumulative-transverse variables. results obtained do not indicate...
Abstract The yields of $$K^0_S$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>K</mml:mi> <mml:mi>S</mml:mi> <mml:mn>0</mml:mn> </mml:msubsup> </mml:math> mesons have been measured in inelastic p+p interactions at incident projectile momenta 31, 40 and 80 $$\text {Ge}\hspace{-1.00006pt}\text {V}\!/\!c$$ <mml:mrow> <mml:mtext>Ge</mml:mtext> <mml:mspace/> <mml:mtext>V</mml:mtext> <mml:mo>/</mml:mo> <mml:mi>c</mml:mi> </mml:mrow> ( $$\sqrt{s_{NN}}=7.7, 8.8$$...
Abstract This paper presents the energy dependence of multiplicity and net-electric charge fluctuations in p+p interactions at beam momenta 20, 31, 40, 80, 158 $$\text{ Ge }\hspace{-1.00006pt}\text{ V }\!/\!c$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mspace/> <mml:mtext>Ge</mml:mtext> <mml:mtext>V</mml:mtext> <mml:mo>/</mml:mo> <mml:mi>c</mml:mi> </mml:mrow> </mml:math> . Results are corrected for experimental biases quantified with use cumulants factorial...
We report results from a 2018 pilot run to study the feasibility of nuclear fragmentation measurements with NA61/SHINE experiment at CERN SPS. These are important for interpretation production light secondary cosmic-ray nuclei (Li, Be, and B) in Galaxy. The specific focus here is on cross sections boron Galaxy interactions $^{12}$C hydrogen interstellar medium, including contribution decay short-lived $^{11}$C fragments. data were taken beam momentum 13.5 GeV/c per nucleon two fixed targets,...
This paper presents the multiplicity of neutral and charged hadrons produced in 90 GeV$/c$ proton-carbon interactions from a dataset taken by NA61/SHINE experiment 2017. Particle identification via dE/dx was performed for $\pi^\pm$, $K^\pm$, $p / \bar{p}$; $K^0_S$, $\Lambda$, $\bar{\Lambda}$ were identified an invariant mass analysis their decays to hadrons. Double-differential results as function laboratory momentum polar angle are presented each particle species; these provide vital...
NA61/SHINE is an experiment at the CERN Super Proton Synchrotron. The main goals of are search for critical point strongly interacting matter and study properties onset deconfinement. To reach these goals, two-dimensional scan in beam momentum ($13A-150A$ GeV/$c$) system size ($p$+$p$, Be+Be, Ar+Sc, Xe+La, Pb+Pb) was performed. In final stage collision, spectra protons only weakly affected by effects resonance decays rescattering due to their large mass. Thus, proton rapidity distribution...
The NA61/SHINE experiment at the CERN Super Proton Synchrotron studies onset of deconfinement in strongly interacting matter through a beam energy scan particle production collisions nuclei varied sizes. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions mean multiplicities $\pi^\pm$, $K^\pm$, $p$ $\bar{p}$ produced $^{40}$Ar+$^{45}$Sc momenta 13$A$, 19$A$, 30$A$, 40$A$, 75$A$ 150$A$~\GeVc. analysis uses 10\% most central...