N. Apadula
A5047342242- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Dark Matter and Cosmic Phenomena
- Stochastic processes and statistical mechanics
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Statistical Methods and Bayesian Inference
- CCD and CMOS Imaging Sensors
- Pediatric Urology and Nephrology Studies
- Pulsars and Gravitational Waves Research
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Theoretical and Computational Physics
- Markov Chains and Monte Carlo Methods
- Cold Atom Physics and Bose-Einstein Condensates
- advanced mathematical theories
- Atmospheric and Environmental Gas Dynamics
- Simulation Techniques and Applications
- Photocathodes and Microchannel Plates
- Muon and positron interactions and applications
Lawrence Berkeley National Laboratory
2018-2025
European Organization for Nuclear Research
2023-2024
Iowa State University
2015-2024
Stony Brook University
2014-2024
A. Alikhanyan National Laboratory
2018-2024
State University of New York
2024
Universidad Nacional Autónoma de México
2018-2023
Augustana University
2016-2023
PHENIX laboratory
2016-2023
Banaras Hindu University
2016-2023
The PHENIX collaboration at the Relativistic Heavy Ion Collider (RHIC) reports measurements of azimuthal dihadron correlations near midrapidity in $d$$+$Au collisions $\sqrt{s_{_{NN}}}$=200 GeV. These complement recent analyses by experiments Large Hadron (LHC) involving central $p$$+$Pb $\sqrt{s_{_{NN}}}$=5.02 TeV, which have indicated strong anisotropic long-range angular distributions hadron pairs. origin these anisotropies is currently unknown. Various competing explanations include...
A bstract We report the measured transverse momentum ( p T ) spectra of primary charged particles from pp, p-Pb and Pb-Pb collisions at a center-of-mass energy $$ \sqrt{s_{\mathrm{NN}}}=5.02 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mrow> <mml:mi>N</mml:mi> </mml:mrow> </mml:msub> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>5.02</mml:mn> </mml:math> TeV in kinematic range 0 . 15 < 50 GeV/ c | η 8. significant improvement...
The ALICE Collaboration reports unique data on particle production in Pb-Pb and inelastic $p$-$p$ collisions at the LHC 5.02 TeV. measurements range from very peripheral to most central collisions, cover particles with transverse momenta hundreds of MeV/$c$ 20 GeV/$c$. precision breadth provide tight constraints our understanding mechanisms these collisions.
Comprehensive results on the production of unidentified charged particles, ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}, {\mathrm{K}}^{\ifmmode\pm\else\textpm\fi{}}, {\mathrm{K}}_{\mathrm{S}}^{0}, {\mathrm{K}}^{*}{(892)}^{0}, p, \overline{p}, \ensuremath{\phi}$(1020), $\mathrm{\ensuremath{\Lambda}}, \overline{\mathrm{\ensuremath{\Lambda}}}, {\mathrm{\ensuremath{\Xi}}}^{\ensuremath{-}}, {\overline{\mathrm{\ensuremath{\Xi}}}}^{+}, {\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}$, and...
Abstract One of the key challenges for nuclear physics today is to understand from first principles effective interaction between hadrons with different quark content. First successes have been achieved using techniques that solve dynamics quarks and gluons on discrete space-time lattices 1,2 . Experimentally, strong studied by scattering off each other. Such experiments are difficult or impossible unstable 3–6 so high-quality measurements exist only containing up down 7 Here we demonstrate...
The first evidence of spin alignment vector mesons ($K^{*0}$ and $\phi$) in heavy-ion collisions at the Large Hadron Collider (LHC) is reported. density matrix element $\rho_{00}$ measured midrapidity ($|y| <$ 0.5) Pb-Pb a center-of-mass energy ($\sqrt{s_{\rm NN}}$) 2.76 TeV with ALICE detector. values are found to be less than 1/3 (1/3 implies no alignment) low transverse momentum ($p_{\rm T} 2 GeV/$c$) for $K^{*0}$ $\phi$ level 3$\sigma$ 2$\sigma$, respectively. No significant observed...
Recent pT-integrated cross-section measurements of the ground-state charm mesons and baryons, D0, D+, Ds+, Λc+, Ξc0, are used to evaluate fragmentation fractions production cross section per unit rapidity at midrapidity (|y|<0.5), in pp collisions s=5.02 TeV LHC. The latter is dσcc¯/dy||y|<0.5=1165±44(stat)−101+134(syst) μb. These were obtained for first time hadronic LHC, including baryon states, recently measured by ALICE midrapidity. differ significantly from values e+e− ep collisions,...
Abstract The ALICE experiment was proposed in 1993, to study strongly-interacting matter at extreme energy densities and temperatures. This proposal entailed a comprehensive investigation of nuclear collisions the LHC. Its physics programme initially focused on determination properties quark–gluon plasma (QGP), deconfined state quarks gluons, created such collisions. has been extended cover broader ensemble observables related Quantum Chromodynamics (QCD), theory strong interactions. studied...
Abstract A Large Ion Collider Experiment (ALICE) has been conceived and constructed as a heavy-ion experiment at the LHC. During LHC Runs 1 2, it produced wide range of physics results using all collision systems available In order to best exploit new opportunities opening up with upgraded detector technologies, undergone major upgrade during Long Shutdown 2 (2019–2022). This comprises move continuous readout, complete overhaul core detectors, well online event processing farm redesigned...
We present azimuthal angular correlations between charged hadrons and energy deposited in calorimeter towers central d+Au minimum bias p+p collisions at √sNN=200 GeV. The hadron is measured midrapidity |η|<0.35, the large rapidity (−3.7<η<−3.1, Au-going direction). An enhanced near-side correlation across |Δη|>2.75 observed collisions. Using event plane method applied to distribution, we extract anisotropy strength v2 for inclusive up pT=4.5 GeV/c. also measurement of identified π±...
We present the first measurement of elliptic (v2) and triangular (v3) flow in high-multiplicity 3He+Au collisions at √sNN=200 GeV. Two-particle correlations, where particles have a large separation pseudorapidity, are compared p+p indicate that collective effects dominate second third Fourier components for correlations observed system. The behavior is quantified terms v2 v3 anisotropy coefficients measured with respect to their corresponding event planes. values comparable those previously...
Direct photons produced in relativistic heavy-ion collisions allow access to the state of matter during collision, because they do not experience strong interaction and can escape from fireball without scattering. New data PHENIX experiment at RHIC show that as a function impact parameter yield direct increases much more rapidly than particle production, which provides new evidence for emission system when it was most hot dense.
The transverse momentum (${p}_{T}$) spectra and ratios of identified charged hadrons (${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}^{\ifmmode\pm\else\textpm\fi{}}$, $p$, $\overline{p}$) produced in $\sqrt{{s}_{{}_{NN}}}=200$ GeV $\mathrm{Au}+\mathrm{Au}$ $d+\text{Au}$ collisions are reported five different centrality classes for each collision species. measurements pions protons up to ${p}_{T}=6$ GeV/$c$ (5 GeV/$c$), the kaons ${p}_{T}=4$ (3.5 GeV/$c$) ($d+\text{Au}$) collisions....
Back-to-back hadron pair yields in d+Au and p+p collisions at sqrt(s_NN)=200 GeV were measured with the PHENIX detector Relativistic Heavy Ion Collider. Rapidity separated pairs detected trigger pseudorapidity |eta|<0.35 associated forward rapidity (deuteron direction, 3.0<eta<3.8). Pairs also both hadrons rapidity; this case yield of back-to-back small impact parameters is observed to be suppressed by a factor 10 relative collisions. The kinematics these expected probe partons Au nucleus...
The first measurements of anisotropic flow coefficients $v_{\rm{n}}$ for mid-rapidity charged particles in Xe-Xe collisions at $\sqrt{s_{\rm{NN}}} = 5.44$ TeV are presented. Comparing these to those from Pb-Pb 5.02$ TeV, $v_{2}$ is found be suppressed mid-central the same centrality, and enhanced central collisions. values $v_{3}$ generally larger than a given centrality. These observations consistent with expectations hydrodynamic predictions. When both divided by their corresponding...
Measurements of anisotropic flow coefficients (v_{n}) and their cross-correlations using two- multiparticle cumulant methods are reported in collisions pp at sqrt[s]=13 TeV, p-Pb a center-of-mass energy per nucleon pair sqrt[s_{NN}]=5.02 Xe-Xe sqrt[s_{NN}]=5.44 Pb-Pb TeV recorded with the ALICE detector. The multiplicity dependence v_{n} is studied very wide range from 20 to 3000 particles produced midrapidity region |η|<0.8 for transverse momentum 0.2<p_{T}<3.0 GeV/c. An ordering...
We present results for three charmonia states (${\ensuremath{\psi}}^{\ensuremath{'}}$, ${\ensuremath{\chi}}_{c}$, and $J/\ensuremath{\psi}$) in $d+\mathrm{Au}$ collisions at $|y|<0.35$ $\sqrt{{s}_{NN}}=200\text{ }\text{ }\mathrm{GeV}$. find that the modification of ${\ensuremath{\psi}}^{\ensuremath{'}}$ yield relative to $J/\ensuremath{\psi}$ scales approximately with charged particle multiplicity midrapidity across $p+A$, $d+\mathrm{Au}$, $A+A$ from Super Proton Synchrotron Relativistic...
We report measurements of the production prompt D$^0$, D$^+$, D$^{*+}$ and D$^+_{\rm s}$ mesons in Pb-Pb collisions at centre-of-mass energy per nucleon-nucleon pair $\sqrt{s_{\rm NN}}=5.02$ TeV, centrality classes 0-10%, 30-50% 60-80%. The D-meson yields are measured mid-rapidity ($|y|<0.5$) as a function transverse momentum ($p_{\rm T}$). $p_{\rm T}$ intervals covered central are: $1<p_{\rm T}<50$ Gev/$c$ for $2<p_{\rm GeV/$c$ $3<p_{\rm D$^{*+}$, $4<p_{\rm T}<16$ mesons. nuclear...
We report on the first femtoscopic measurement of baryon pairs, such as p-p, p-$\Lambda$ and $\Lambda$-$\Lambda$, measured by ALICE at Large Hadron Collider (LHC) in proton-proton collisions $\sqrt{s}$ = 7 TeV. This study demonstrates feasibility measurements pp ultrarelativistic energies. The femtoscopy method is employed to constrain hyperon-nucleon hyperon-hyperon interactions, which are still rather poorly understood. A new evaluate influence residual correlations induced decays...
The PHENIX experiment at the Relativistic Heavy Ion Collider has measured 2nd and 3rd order Fourier coefficients of azimuthal distributions direct photons emitted midrapidity in Au$+$Au collisions $\sqrt{s_{_{NN}}}=200$ GeV for various collision centralities. Combining two different analysis techniques, results were obtained transverse momentum range $0.4
A bstract Measurements of anisotropic flow coefficients with two- and multi-particle cumulants for inclusive charged particles in Pb-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}}=5.02 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mrow> <mml:mi>N</mml:mi> </mml:mrow> </mml:msub> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>5.02</mml:mn> </mml:math> 2.76 TeV are reported the pseudorapidity range | η < 0.8 transverse momentum 0.2 p T 50 GeV/...
This work presents new constraints on the existence and binding energy of a possible $\Lambda$-$\Lambda$ bound state, H-dibaryon, derived from femtoscopic measurements by ALICE collaboration. The results are obtained measurement using femtoscopy technique in pp collisions at $\sqrt{s}=13$ TeV p-Pb $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV, combined with previously published $\sqrt{s}=7$ TeV. scattering parameter space, spanned inverse length $f_0^{-1}$ effective range $d_0$, is constrained comparing...
Transverse momentum (pT ) spectra of charged particles at mid-pseudorapidity in Xe–Xe collisions sNN=5.44TeV measured with the ALICE apparatus Large Hadron Collider are reported. The kinematic range 0.15<pT<50GeV/c and |η|<0.8 is covered. Results presented nine classes collision centrality 0–80% range. For comparison, a pp reference energy s=5.44 TeV obtained by interpolating between existing measurements s=5.02 7 TeV. nuclear modification factors central Pb–Pb similar center-of-mass...