R. Amirikas
A5009373241- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Scientific Research and Discoveries
- Muon and positron interactions and applications
- Stochastic processes and statistical mechanics
- Radioactivity and Radon Measurements
- Business Strategy and Innovation
- Smart Cities and Technologies
- Innovation, Sustainability, Human-Machine Systems
- Photocathodes and Microchannel Plates
- Statistical Mechanics and Entropy
- Life Cycle Costing Analysis
- Digital Transformation in Industry
- Green IT and Sustainability
- Radioactive contamination and transfer
Technical University of Applied Sciences Wildau
2023-2024
Florida State University
2003-2007
Deutsches Elektronen-Synchrotron DESY
2007
Institute of Particle Physics
2005
École Nationale Supérieure des Mines de Paris
2005
Laboratoire de Physique Subatomique et des Technologies Associées
2005
Konkuk University
2000-2001
The University of Sydney
1994-1999
Slovak Academy of Sciences
1995
Lund University
1995
The centrality dependence of transverse momentum distributions and yields for ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}},{K}^{\ifmmode\pm\else\textpm\fi{}},p$, $\overline{p}$ in $\text{Au}+\text{Au}$ collisions at $\sqrt{{s}_{NN}}=200\phantom{\rule{0.3em}{0ex}}\text{GeV}$ midrapidity are measured by the PHENIX experiment Relativistic Heavy Ion Collider. We observe a clear particle mass shapes spectra central below $\ensuremath{\sim}2\phantom{\rule{0.3em}{0ex}}\text{GeV}∕c$ ${p}_{T}$....
The anisotropy parameter (v(2)), the second harmonic of azimuthal particle distribution, has been measured with PHENIX detector in Au+Au collisions at sqrt[s(NN)]=200 GeV for identified and inclusive charged production central rapidities (|eta|<0.35) respect to reaction plane defined high (|eta|=3-4 ). We observe that v(2) mesons falls below (anti)baryons p(T)>2 GeV/c, marked contrast predictions a hydrodynamical model. A quark-coalescence model is also investigated.
Transverse momentum spectra of neutral pions in the range 1<pT<10 GeV/c have been measured at midrapidity by PHENIX experiment BNL RHIC Au+Au collisions sNN=200 GeV. The π0 multiplicity central reactions is significantly below yields same sNN peripheral and p+p scaled number nucleon-nucleon collisions. For most bin, suppression factor ∼2.5 pT=2 increases to ∼4–5 pT≈4 GeV/c. At larger pT, remains constant within errors. deficit already apparent semiperipheral smoothly with centrality.Received...
The PHENIX experiment has measured midrapidity ([FORMULA: SEE TEXT]) transverse momentum spectra of electrons as a function centrality in Au+Au collisions at [FORMULA: TEXT]. Contributions from photon conversions and light hadron decays, mainly Dalitz decays pi0 eta mesons, were removed. resulting nonphotonic electron are primarily due to the semileptonic hadrons carrying heavy quarks. Nuclear modification factors determined by comparison p+p collisions. A significant suppression high pT is...
Azimuthal correlations of jet-induced high-pT charged hadron pairs are studied at midrapidity in Au+Au collisions √sNN=200 GeV. The distribution jet-associated partner hadrons (1.0<pT<2.5 GeV/c) per trigger (2.5<pT<4.0 is found to vary with collision centrality, both shape and yield, indicating a significant effect the nuclear medium on jet fragmentation process.Received 1 July 2005DOI:https://doi.org/10.1103/PhysRevLett.97.052301©2006 American Physical Society
The PHENIX experiment at RHIC has measured charged hadron yields mid-rapidity over a wide range of transverse momentum (0.5 < p_T 10 GeV/c) in Au+Au collisions sqrt(s_NN)=200 GeV. data are compared to pi^zero measurements from the same experiment. For both hadrons and neutral pions, per nucleon-nucleon collision significantly suppressed central peripheral collisions. suppression sets gradually increases with increasing centrality Above 4-5 GeV/c p_T, constant almost identical pi^zeroes is...
The invariant differential cross section for inclusive neutral-pion production in p+p collisions at √s=200 GeV has been measured midrapidity (|η|<0.35) over the range 1<pT≲14 GeV/c by PHENIX experiment Relativistic Heavy Ion Collider. Predictions of next-to-leading order perturbative QCD calculations are consistent with these measurements. precision our result is sufficient to differentiate between prevailing gluon-to-pion fragmentation functions.Received 28 April...
The first measurement of direct photons in Au + collisions at (square root)S(NN) = 200 GeV is presented. photon signal extracted as a function the collision centrality and compared to next-to-leading order perturbative quantum chromodynamics calculations. yield shown scale with number nucleon-nucleon for all centralities.
The PHENIX experiment at the relativistic heavy ion collider (RHIC) has measured transverse energy and charged particle multiplicity midrapidity in $\mathrm{Au}+\mathrm{Au}$ collisions center-of-mass energies $\sqrt{{s}_{\mathrm{NN}}}=19.6,130$, $200\phantom{\rule{0.3em}{0ex}}\text{GeV}$ as a function of centrality. presented results are compared to measurements from other RHIC experiments lower energies. $\sqrt{{s}_{\mathrm{NN}}}$ dependence $dE{}_{T}/d\ensuremath{\eta}$...
We report on the yield of protons and antiprotons, as a function centrality transverse momentum, in Au+Au collisions at sqrt[s(NN)]=200 GeV measured midrapidity by PHENIX experiment BNL Relativistic Heavy Ion Collider. In central intermediate momenta (1.5<p(T)<4.5 GeV/c) significant fraction all produced particles are antiprotons. They show centrality-scaling behavior different from that pions. The pmacr;/pi p/pi ratios enhanced compared to peripheral Au+Au, p+p, e(+)e(-) collisions. This...
Inclusive transverse momentum spectra of $\ensuremath{\eta}$ mesons have been measured within ${p}_{T}=2--10\text{ }\text{ }\mathrm{GeV}/c$ at midrapidity by the PHENIX experiment in $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{NN}}=200\text{ }\mathrm{GeV}$. In central yields are significantly suppressed compared to peripheral $\mathrm{Au}+\mathrm{Au}$, $d+\mathrm{Au}$, and $p+p$ scaled corresponding number nucleon-nucleon collisions. The magnitude, centrality, ${p}_{T}$ dependence...
Bose-Einstein correlations of identically charged pion pairs were measured by the PHENIX experiment at mid-rapidity in Au+Au collisions $\sqrt{s_{\rm NN}}$ = 200 GeV. The Bertsch-Pratt radius parameters determined as a function transverse momentum pair and centrality collision. Using \it{full} Coulomb correction, ratio $R_{\rm out}/R_{\rm side}$ is smaller than unity for $<k_{\rm T}>$ from 0.25 to 1.2 GeV/c all centralities. However, using recently developed partial correction methods, we...
Transverse single-spin asymmetries to probe the transverse-spin structure of proton have been measured for neutral pions and nonidentified charged hadrons from polarized proton-proton collisions at midrapidity s=200 GeV. The data cover a transverse momentum (pT) range 1.0–5.0 GeV/c 0.5–5.0 hadrons, Feynman-x value approximately zero. seen in this previously unexplored kinematic region are consistent with zero within errors few percent. In addition, inclusive hadron cross section 0.5<pT<7.0...
The PHENIX experiment has measured midrapidity transverse momentum spectra (0.4<p(T)<4.0 GeV/c) of single electrons as a function centrality in Au+Au collisions at sqrt[s(NN)]=200 GeV. Contributions from photon conversions and Dalitz decays light neutral mesons are by introducing thin (1.7% X0) converter into the acceptance statistically removed. subtracted nonphotonic electron primarily due to semileptonic hadrons containing heavy quarks, mainly charm lower p(T). For all centralities,...
Measurements of neutral pion (π0) production at midrapidity in √sNN=200 GeV Au+Au collisions as a function transverse momentum, pT, collision centrality, and angle with respect to reaction plane are presented. The data represent the final π0 results from PHENIX experiment for first RHIC run design center-of-mass energy. They include additional obtained using Level-2 trigger more than factor 3 increase statistics over previously published pT>6 GeV/c. We evaluate suppression yield high-pT π0's...
In recent decades, artificial intelligence has undergone transformative advancements, reshaping diverse sectors such as healthcare, transport, agriculture, energy, and the media. Despite enthusiasm surrounding AI’s potential, concerns persist about its potential negative impacts, including substantial energy consumption ethical challenges. This paper critically reviews evolving landscape of AI sustainability, addressing economic, social, environmental dimensions. The literature is...
We present the results of $\ensuremath{\phi}$ meson production in ${K}^{+}{K}^{\ensuremath{-}}$ decay channel from $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{\mathit{NN}}}=200\phantom{\rule{0.3em}{0ex}}\mathrm{GeV}$ as measured midrapidity by PHENIX detector Brookhaven National Laboratory's Relativistic Heavy Ion Collider. Precision resonance centroid and width values are extracted a function collision centrality. No significant variation Particle Data Group accepted is observed,...
Inclusive transverse momentum spectra of \ensuremath{\eta} mesons in the range ${p}_{T}\ensuremath{\approx}2$--12 GeV/$c$ have been measured at midrapidity ($|\ensuremath{\eta}|<0.35$) by PHENIX experiment RHIC $p+p,d$+Au, and Au+Au collisions $\sqrt{{s}_{\mathit{NN}}}=200$ GeV. The are reconstructed through their $\ensuremath{\eta}\ensuremath{\rightarrow}\ensuremath{\gamma} \ensuremath{\gamma}$ channel for three colliding systems as well...
Event-by-event fluctuations of the average transverse momentum produced particles near midrapidity have been measured by PHENIX Collaboration in $\sqrt{{s}_{NN}}=200\text{ }\mathrm{G}\mathrm{e}\mathrm{V}$ $\mathrm{A}\mathrm{u}+\mathrm{A}\mathrm{u}$, and $p+p$ collisions at Relativistic Heavy Ion Collider. The are observed to be excess expectation for statistically independent particle emission all centralities. exhibit a dependence on both centrality collision ${p}_{T}$ range over which is...
The transverse momentum dependence of the azimuthal anisotropy parameter v2, second harmonic distribution, for electrons at midrapidity (|η|<0.35) has been measured with PHENIX detector in Au+Au collisions sNN=200 GeV. measurement was made respect to reaction plane defined high rapidities (|η|=3.1−3.9). From result we have v2 from heavy flavor decay after subtraction other sources such as photon conversions and Dalitz light neutral mesons. We observe a nonzero single electron 90% confidence...
J/psi production has been measured in proton-proton collisions at square root of s=200 GeV over a wide rapidity and transverse momentum range by the PHENIX experiment Relativistic Heavy Ion Collider. Distributions momentum, along with measurements mean total cross section are presented compared to available theoretical calculations. The is 4.0+/-0.6(stat)+/-0.6(syst)+/-0.4(abs) mu b. 1.80+/-0.23(stat)+/-0.16(syst) GeV/c.
Two particle correlations between identified meson and baryon trigger particles with $2.5<{p}_{T}<4.0\phantom{\rule{0.3em}{0ex}}\mathrm{GeV}/c$ lower ${p}_{T}$ charged hadrons have been measured at midrapidity by the PHENIX experiment RHIC in $p+p,d+\mathrm{Au}$, $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{\mathit{NN}}}=200\phantom{\rule{0.3em}{0ex}}\mathrm{GeV}$. In noncentral collisions, probability of finding a hadron near azimuthal angle to is almost identical for mesons...