A5063934914- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Stochastic processes and statistical mechanics
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Gas Dynamics and Kinetic Theory
- Nuclear reactor physics and engineering
- Pulsars and Gravitational Waves Research
- Fluid Dynamics and Turbulent Flows
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- earthquake and tectonic studies
- Computational Fluid Dynamics and Aerodynamics
- Atomic and Subatomic Physics Research
- Magnetic confinement fusion research
- Material Dynamics and Properties
- Advanced Data Storage Technologies
Heidelberg University
2021-2025
European Organization for Nuclear Research
2024
Atlantic General Hospital
2022
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2016-2021
Université Paris-Saclay
2016-2021
Centre National de la Recherche Scientifique
2016-2021
CEA Paris-Saclay
2016-2021
Institut de Physique Théorique
2016-2021
École Polytechnique
2018-2019
Emergent bulk properties of matter governed by the strong nuclear force give rise to physical phenomena across vastly different scales, ranging from shape atomic nuclei masses and radii neutron stars. They can be accessed on Earth measuring spatial extent outer skin made neutrons that characterizes surface heavy nuclei. The isotope $^{208}\mathrm{Pb}$, owing its simple structure excess, has been in this context target many dedicated efforts. Here, we determine measurements particle...
The future opportunities for high-density QCD studies with ion and proton beams at the LHC are presented. Four major scientific goals identified: characterisation of macroscopic long wavelength Quark-Gluon Plasma (QGP) properties unprecedented precision, investigation microscopic parton dynamics underlying QGP properties, development a unified picture particle production from small (pp) to large (nucleus--nucleus) systems, exploration densities in nuclei broad ($x$, $Q^2$) kinematic range...
We argue that relativistic hydrodynamics is able to make robust predictions for soft particle production in Xe+Xe collisions at the CERN Large Hadron Collider (LHC). The change of system size from Pb+Pb provides a unique opportunity test scaling laws inherent fluid dynamics. Using event-by-event hydrodynamic simulations, we quantitative several observables: mean transverse momentum, anisotropic flow coefficients, and their fluctuations. Results are shown as function collision centrality.
We exploit the concept of hydrodynamic attractors to establish a general relation between initial state energy and produced particle multiplicities in high-energy nuclear collisions. When combined with an ab initio model deposition, entropy production during pre-equilibrium phase naturally explains universal centrality dependence measured charged yields nucleus-nucleus further estimate density far-from-equilibrium discuss how our results can be used constrain non-equilibrium properties...
In the hydrodynamic framework of heavy-ion collisions, elliptic flow v_{2} is sensitive to quadrupole deformation β colliding ions. This enables one test whether established knowledge on low-energy structure nuclei consistent with collider data from high-energy experiments. We derive a formula based generic scaling laws hydrodynamics relate difference in measured between collision systems that are close size value respective species. validate our simulations ^{238}U+^{238}U and...
The interpretation of the emergent collective behavior atomic nuclei in terms deformed intrinsic shapes is at heart our understanding rich phenomenology their structure, ranging from nuclear energy to astrophysical applications across a vast spectrum scales. A new window into deformation has been recently opened with realization that collision experiments performed high-energy colliders, such as CERN Large Hadron Collider (LHC), enable experimenters identify relative orientation colliding...
State-of-the-art hydrodynamic simulations of the quark-gluon plasma are unable to reproduce elliptic flow particles observed at BNL Relativistic Heavy Ion Collider (RHIC) in relativistic ^{238}U+^{238}U collisions when they rely on information obtained from low-energy experiments for implementation deformation colliding ^{238}U ions. We show that this is due an inappropriate treatment well-deformed nuclei modeling initial conditions plasma. Past studies have identified nuclear surface with...
Bulk nuclear structure properties, such as radii and deformations, leave distinct signatures in the final state of relativistic heavy-ion collisions. Isobaric collisions offer an easy route to establish explicit connections between colliding nuclei's observable outcomes. Here, we investigate effects skin thickness deformations on elliptic flow ($v_2$) its fluctuations high-energy $^{96}$Ru+$^{96}$Ru $^{96}$Zr+$^{96}$Zr Our findings reveal that difference these isobars only influences...
Elliptic flow, ${v}_{2}$, and triangular ${v}_{3}$, are to a good approximation linearly proportional the corresponding spatial anisotropies of initial density profile, ${\ensuremath{\varepsilon}}_{2}$ ${\ensuremath{\varepsilon}}_{3}$. Using event-by-event hydrodynamic simulations, we point out when deviations from this linear scaling be expected. When these negligible, relative ${v}_{n}$ fluctuations equal ${\ensuremath{\varepsilon}}_{n}$ fluctuations, one can directly probe models...
I show that particle collider experiments on relativistic nuclear collisions can serve as direct probes of the deformation colliding species. argue collision events presenting very large multiplicities particles and small values average transverse momentum emitted hadrons probe geometries in which ellipsoids fully overlap along their longer side. By looking at these one selects interaction regions whose elliptic anisotropy is determined by deformed shape, becomes accessible experimentally...
We show that the correlation between elliptic momentum anisotropy, $v_2$, and average transverse momentum, $[p_T]$, at fixed multiplicity in small system nuclear collisions carries information on origin of observed anisotropy. A calculation using a hybrid IP-Glasma+\textsc{Music}+UrQMD model includes contributions from final state response to initial geometry as well anisotropies Color Glass Condensate, predicts characteristic sign change correlator $\hat{\rho}(v_2^2,[p_T])$ function charged...
The correlation between the mean transverse momentum of outgoing particles, $\langle p_t \rangle$, and magnitude anisotropic flow, $v_n$, has recently been measured in Pb+Pb collisions at CERN Large Hadron Collider, as a function collision centrality. We confirm previous observation that event-by-event hydrodynamics predicts $v_n$ \rangle$ is similar to data. show this can be directly predicted from initial condition hydrodynamic calculation, for $n=2,3$, if one replaces by corresponding...
Abstract High-energy nuclear collisions encompass three key stages: the structure of colliding nuclei, informed by low-energy physics, initial condition , leading to formation quark–gluon plasma (QGP), and hydrodynamic expansion hadronization QGP, final-state hadron distributions that are observed experimentally. Recent advances in both experimental theoretical methods have ushered a precision era heavy-ion collisions, enabling an increasingly accurate understanding these stages. However,...
Using event-by-event hydrodynamic calculations, we find that the fluctuations of elliptic flow ($v_2$) in reaction plane have a negative skew. We compare skewness $v_2$ to initial eccentricity fluctuations. show is main effect lifting degeneracy between higher-order cumulants, with skew corresponding hierarchy $v_2\{4\}>v_2\{6\}$ observed Pb+Pb collisions at LHC. describe how can be measured experimentally and hydrodynamics naturally reproduces its magnitude centrality dependence.
The ALICE Collaboration has recently measured the correlations between amplitudes of anisotropic flow in different Fourier harmonics, referred to as symmetric cumulants. We derive approximate relations cumulants involving ${v}_{4}$ and ${v}_{5}$ event-plane by ATLAS Collaboration. validity these is tested using event-by-event hydrodynamic calculations. corresponding results are better agreement with data than existing predictions. make quantitative predictions for three which have not yet...
In ultrarelativistic heavy-ion experiments, one estimates the centrality of a collision by using single observable, say $n$, typically given transverse energy or number tracks observed in dedicated detector. The correlation between $n$ and impact parameter $b$ is then inferred fitting specific model dynamics, such as Glauber model, to experimental data. goal this paper assess precisely which information about can be extracted from data without any collision. Under sole assumption that...
Preliminary data by the STAR collaboration at BNL Relativistic Heavy Ion Collider shows that elliptic flow, $v_2$, and average transverse momentum, $\langle p_t \rangle$, of final-state hadrons produced in high-multiplicity $^{238}$U+$^{238}$U collisions are negatively correlated. This observation brings experimental evidence a significant prolate deformation, $\beta\approx 0.3$, colliding $^{238}$U nuclei. I show quantitative description this new phenomenon can be achieved within...
In order to study predictions of the Color-Glass Condensate approach, authors this paper consider di-hadron correlation functions for proton-proton or proton-nucleus collisions. For first time, they make use transverse-momentum-dependent gluon distributions evolved with running-coupling corrections, finding good agreement existing data.
Nuclides sharing the same mass number (isobars) are observed ubiquitously along stability line. While having nearly identical radii, stable isobars can differ in shape, and present particular different quadrupole deformations. We show that even small differences these deformations be probed by relativistic nuclear collisions experiments, where they manifest as deviations from unity ratios of elliptic flow coefficients taken between isobaric systems. Collider experiments with represent, thus,...
The notion of the "size" nucleons and their constituents plays a pivotal role in current paradigm formation fluctuations quark-gluon plasma produced high-energy nuclear collision experiments. We report on state-of-the-art hydrodynamic results showing that correlation between anisotropic flow v_{n}^{2} mean transverse momentum hadrons [p_{t}] possesses unique sensitivity to nucleon size off-central heavy-ion collisions. argue existing experimental measurements this observable support picture...