E. Bartsch
A5051565042- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Statistical Methods and Bayesian Inference
- Radiation Detection and Scintillator Technologies
- Cosmology and Gravitation Theories
- Nuclear physics research studies
- Computational Physics and Python Applications
- Stochastic processes and statistical mechanics
- Superconducting Materials and Applications
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Software System Performance and Reliability
- advanced mathematical theories
- Fault Detection and Control Systems
- Muon and positron interactions and applications
- Cyclone Separators and Fluid Dynamics
- Software Testing and Debugging Techniques
- CCD and CMOS Imaging Sensors
- Solar and Space Plasma Dynamics
- Atomic and Molecular Physics
- Theoretical and Computational Physics
Goethe University Frankfurt
2016-2025
A. Alikhanyan National Laboratory
2015-2024
University of Bergen
2015-2024
University of Houston
2023-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2017-2023
Technical University of Munich
2021
European Organization for Nuclear Research
2018-2019
The pseudorapidity density of charged particles ($\mathrm{d}N_\mathrm{ch}/\mathrm{d}\eta$) at mid-rapidity in Pb-Pb collisions has been measured a center-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}}$ = 5.02 TeV. It increases with centrality and reaches value $1943 \pm 54$ $|\eta|<0.5$ for the 5% most central collisions. A rise $\mathrm{d}N_\mathrm{ch}/\mathrm{d}\eta$ as function is observed, steeper than that observed proton-proton following trend established by measurements lower...
Direct photon production at mid-rapidity in Pb-Pb collisions $\sqrt{s_{_{\mathrm{NN}}}} = 2.76$ TeV was studied the transverse momentum range $0.9 < p_\mathrm{T} 14$ GeV$/c$. Photons were detected with highly segmented electromagnetic calorimeter PHOS and via conversions ALICE detector material $e^+e^-$ pair reconstructed central tracking system. The results of two methods combined direct spectra measured for 0-20%, 20-40%, 40-80% centrality classes. For all three classes, agreement found...
We report measurements of the primary charged-particle pseudorapidity density and transverse momentum distributions in $p\ensuremath{-}\mathrm{Pb}$ collisions at $\sqrt{{s}_{\mathit{NN}}}=5.02\phantom{\rule{0.28em}{0ex}}\mathrm{TeV}$ investigate their correlation with experimental observables sensitive to centrality collision. Centrality classes are defined by using different event-activity estimators, i.e., multiplicities measured three regions as well energy beam rapidity (zero degree)....
We report the first results of elliptic ($v_2$), triangular ($v_3$) and quadrangular flow ($v_4$) charged particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV with ALICE detector CERN Large Hadron Collider. The measurements are performed central pseudorapidity region $|\eta|<0.8$ for transverse momentum range $0.2<p_{\rm T}<5$ GeV/$c$. anisotropic is measured using two-particle correlations a gap greater than one unit multi-particle cumulant method. Compared to from NN}}=2.76$ TeV,...
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.
The production of the hypertriton nuclei $^{3}_{\Lambda}\mathrm H$ and $^{3}_{\bar{\Lambda}} \overline{\mathrm H}$ has been measured for first time in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV with ALICE experiment LHC energies. total yield, d$N$/d$y$ $\times \mathrm{B.R.}_{\left( ^{3}_{\Lambda}\mathrm H \rightarrow ^{3}\mathrm{He},\pi^{-} \right)} \left( 3.86 \pm 0.77 (\mathrm{stat.}) 0.68 (\mathrm{syst.})\right) \times 10^{-5}$ 0-10% most central collisions, is consistent...
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...
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...
The measurement of primary $$\pi ^{\pm }$$ , $$K^{\pm $$p$$ and $${\overline{{p}}}$$ production at mid-rapidity ( $$|y| <$$ 0.5) in proton–proton collisions $$\sqrt{s}$$ $$=$$ 7 TeV performed with a large ion collider experiment the hadron (LHC) is reported. Particle identification using specific ionisation energy-loss time-of-flight information, ring-imaging Cherenkov technique kink-topology weak decays charged kaons. Transverse momentum spectra are measured from 0.1 up to 3 GeV/ $$c$$ for...
We report the measurements of correlations between event-by-event fluctuations amplitudes anisotropic flow harmonics in nucleus-nucleus collisions, obtained for first time using a new analysis method based on multiparticle cumulants mixed harmonics. This novel is robust against systematic biases originating from nonflow effects and by construction any dependence symmetry planes eliminated. demonstrate that exhibit better sensitivity to medium properties than individual The are performed...
The multi-strange baryon yields in PbPb collisions have been shown to exhibit an enhancement relative pp reactions. In this work, Ξ and Ω production rates measured with the ALICE experiment as a function of transverse momentum, pT, pPb at centre-of-mass energy sNN=5.02 TeV. results cover kinematic ranges 0.6 GeV/c<pT<7.2 GeV/c 0.8 GeV/c<pT<5 GeV/c, for respectively, common rapidity interval −0.5<yCMS<0. Multi-strange baryons identified by reconstructing their weak decays into charged...
The transverse momentum (p T ) spectrum and nuclear modification factor (R AA of reconstructed jets in 0-10% 10-30% central Pb-Pb collisions at √ s NN = 2.76 TeV were measured.Jets using the anti-k jet algorithm with a resolution parameter R 0.2 from charged neutral particles, utilizing ALICE tracking detectors Electromagnetic Calorimeter (EMCal).The p spectra are reported pseudorapidity interval |η | < 0.5 for 40 T, 120 GeV/c 30 100 collisions.Reconstructed required to contain leading...
The production of prompt charmed mesons D0, D+ and D∗+, their antiparticles, was measured with the ALICE detector in Pb-Pb collisions at centre-of-mass energy per nucleon pair, $$ \sqrt{s_{\mathrm{NN}}} , 2.76 TeV. yields for rapidity |y| < 0.5 are presented as a function transverse momentum, p T, interval 1–36 GeV/c centrality class 0–10% 1–16 30–50%. nuclear modification factor R AA computed using proton-proton reference \sqrt{s}=2.76 TeV, based on measurements \sqrt{s}=7 TeV theoretical...
The production of charged pions, kaons and (anti)protons has been measured at mid-rapidity ($-0.5 < y 0$) in p-Pb collisions $\sqrt{s_{\rm NN}}=5.02$ TeV using the ALICE detector LHC. Exploiting particle identification capabilities high transverse momentum ($p_{\rm T}$), previously published $p_{\rm T}$ spectra have extended to include measurements up 20 GeV/$c$ for seven event multiplicity classes. pp $\sqrt{s}=7$ TeV, needed interpolate a reference spectrum, also measure nuclear...
Transverse momentum $({p}_{\mathrm{T}})$ spectra of pions, kaons, and protons up to ${p}_{\mathrm{T}}=20\phantom{\rule{0.28em}{0ex}}\text{GeV}/c$ have been measured in Pb-Pb collisions at $\sqrt{{s}_{\mathit{NN}}}=2.76\phantom{\rule{0.28em}{0ex}}\text{TeV}$ using the ALICE detector for six different centrality classes covering 0%--80%. The proton-to-pion kaon-to-pion ratios both show a distinct peak ${p}_{\mathrm{T}}\ensuremath{\approx}3\phantom{\rule{0.28em}{0ex}}\text{GeV}/c$ central that...
The pseudorapidity ($η$) and transverse-momentum ($p_{\rm T}$) distributions of charged particles produced in proton-proton collisions are measured at the centre-of-mass energy $\sqrt{s}$ = 13 TeV. distribution $|η|
We report on the first measurement of an excess in yield $J/\ensuremath{\psi}$ at very low transverse momentum (${p}_{T}<0.3\text{ }\text{ }\mathrm{GeV}/c$) peripheral hadronic Pb-Pb collisions $\sqrt{{s}_{\mathrm{NN}}}=2.76\text{ }\mathrm{TeV}$, performed by ALICE CERN LHC. Remarkably, measured nuclear modification factor rapidity range $2.5<y<4$ reaches about 7 (2) ${p}_{T}$ $0--0.3\text{ }\mathrm{GeV}/c$ 70%--90% (50%--70%) centrality class. The production cross section associated with...
The production cross sections for prompt charmed mesons $$\mathrm{D^0}$$ , $$\mathrm{D^+}$$ $$\mathrm{D^{*+}}$$ and $$\mathrm{D_s^+}$$ were measured at mid-rapidity in proton–proton collisions a centre-of-mass energy $$\sqrt{s}=7~{\mathrm {TeV}}$$ with the ALICE detector Large Hadron Collider (LHC). D reconstructed from their decays $$\mathrm{D}^0 \rightarrow \mathrm{K}^-\pi ^+$$ $$\mathrm{D}^+\rightarrow ^+\pi $$\mathrm{D}^{*+} \mathrm{D}^0 \pi $$\mathrm{D_s^{+}\rightarrow \phi...
A detailed study of pseudorapidity densities and multiplicity distributions primary charged particles produced in proton–proton collisions, at $$\sqrt{s} =$$ 0.9, 2.36, 2.76, 7 8 TeV, the range $$|\eta |<2$$ , was carried out using ALICE detector. Measurements were obtained for three event classes: inelastic, non-single diffractive events with least one particle interval |<1$$ . The use an improved track-counting algorithm combined ALICE's measurements processes allows a higher precision...
The production of K $$^{*}$$ (892) $$^{0}$$ and $$\phi $$ (1020) mesons has been measured in p–Pb collisions at $$\sqrt{s_{{\text {NN}}}}$$ $$=$$ 5.02 TeV. $$^{*0}$$ are reconstructed via their decay into charged hadrons with the ALICE detector rapidity range $$-0.5 <y <0$$ . transverse momentum spectra, as a function multiplicity, have p $$_{\mathrm {T}}$$ from 0 to 15 GeV/c for 0.3 21 Integrated yields, mean momenta particle ratios reported compared results pp $$\sqrt{s}$$ 7 TeV Pb–Pb 2.76...
Invariant differential yields of deuterons and anti-deuterons in pp collisions at $\sqrt{s}$ = 0.9, 2.76 7 TeV the tritons, $^{3}$He nuclei their anti-nuclei have been measured with ALICE detector CERN Large Hadron Collider. The measurements cover a wide transverse momentum ($p_{\text{T}}$) range rapidity interval $|y|<0.5$, extending both energy $p_{\text{T}}$ reach previous up to 3 GeV/$c$ for $A=2$ 6 $A=3$. coalescence parameters (anti-)deuterons $^{3}\overline{\text{He}}$ exhibit an...
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/...
We present the charged-particle pseudorapidity density in Pb–Pb collisions at sNN=5.02TeV centrality classes measured by ALICE. The measurement covers a wide range from −3.5 to 5, which is sufficient for reliable estimates of total number charged particles produced collisions. For most central (0–5%) we find 21400±1300, while peripheral (80–90%) 230±38. This corresponds an increase (27±4)% over results sNN=2.76TeV previously reported energy dependence heavy-ion found obey modified power-law...
In this Letter, the ALICE Collaboration presents first measurements of charged-particle multiplicity density, dNch/dη, and total multiplicity, Nchtot, in Xe–Xe collisions at a centre-of-mass energy per nucleon–nucleon pair sNN=5.44TeV. The are performed as function collision centrality over wide pseudorapidity range −3.5<η<5. values dNch/dη mid-rapidity Nchtot for central collisions, normalised to number nucleons participating (Npart) sNN follow trends established previous heavy-ion...