Jonatan Adolfsson
A5080963856- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Nuclear reactor physics and engineering
- advanced mathematical theories
- Stochastic processes and statistical mechanics
- Spectroscopy Techniques in Biomedical and Chemical Research
- Scientific Research and Discoveries
- Age of Information Optimization
- Atomic and Molecular Physics
- Advanced Data Storage Technologies
- Superconducting Materials and Applications
- Solar and Space Plasma Dynamics
- Advanced Memory and Neural Computing
- Nuclear physics research studies
Lund University
2017-2024
Swedish Defence Research Agency
2024
State Innovation Exchange
2020-2021
Budker Institute of Nuclear Physics
2020
Center for Research and Advanced Studies of the National Polytechnic Institute
2020
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
2020
California Polytechnic State University
2020
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2020
Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules
2020
Aligarh Muslim University
2020
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...
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...
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 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 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...
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...
This Letter presents the first experimental observation of attractive strong interaction between a proton and multistrange baryon (hyperon) Ξ^{-}. The result is extracted from two-particle correlations combined p-Ξ^{-}⊕p[over ¯]-Ξ[over ¯]^{+} pairs measured in p-Pb collisions at sqrt[s_{NN}]=5.02 TeV LHC with ALICE. correlation function compared prediction obtained assuming only an Coulomb standard deviation range [3.6, 5.3] found. Since significantly enhanced respect to prediction, presence...
Results on the production of 4He and nuclei in Pb–Pb collisions at sNN=2.76TeV rapidity range |y|<1, using ALICE detector, are presented this paper. The densities corresponding to 0–10% central events found be dN/dyHe4=(0.8±0.4(stat)±0.3(syst))×10−6 , respectively. This is agreement with statistical thermal model expectation assuming same chemical freeze-out temperature (Tchem=156MeV) as for light hadrons. measured ratio 1.4±0.8(stat)±0.5(syst).
The first measurement at the LHC of charge-dependent directed flow (${v}_{1}$) relative to spectator plane is presented for Pb-Pb collisions $\sqrt{{s}_{\mathrm{NN}}}=5.02\text{ }\text{ }\mathrm{TeV}$. Results are reported charged hadrons and ${\mathrm{D}}^{0}$ mesons transverse momentum intervals ${p}_{\mathrm{T}}>0.2\text{ }\mathrm{GeV}/c$ $3<{p}_{\mathrm{T}}<6\text{ in 5%--40% 10%--40% centrality classes, respectively. difference between positively negatively hadron ${v}_{1}$ has a...
This article reports measurements of the ${p}_{\mathrm{T}}$-differential inclusive jet cross section in $pp$ collisions at $\sqrt{s}=5.02\phantom{\rule{0.16em}{0ex}}\mathrm{TeV}$ and yield $\text{Pb-Pb}$ 0--10% central $\sqrt{{s}_{NN}}=5.02\phantom{\rule{0.16em}{0ex}}\mathrm{TeV}$. Jets were reconstructed midrapidity with ALICE tracking detectors electromagnetic calorimeter using anti-${k}_{\mathrm{T}}$ algorithm. For collisions, we report sections for resolution parameters $R=0.1--0.6$ over...
We report on the measurement of size particle-emitting source from two-baryon correlations with ALICE in high-multiplicity pp collisions at $\sqrt{s}$ = 13 TeV. The radius is studied low relative momentum p-p, $\bar{\rm{p}}$-$\bar{\rm{p}}$, p-$\Lambda$ and $\bar{\rm{p}}$-$\bar{\Lambda}$ pairs as a function pair transverse mass $m_{\rm{T}}$ considering for first time quantitative way effect strong resonance decays. After correcting this effect, radii extracted different particle species...
A bstract The production of prompt D 0 , + and *+ mesons was measured at midrapidity (| y | < 0.5) in Pb–Pb collisions the centre-of-mass energy per nucleon–nucleon pair $$ \sqrt{s_{\mathrm{NN}}} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:msub> <mml:mi>s</mml:mi> <mml:mi>NN</mml:mi> </mml:msub> </mml:msqrt> </mml:math> = 5 . 02 TeV with ALICE detector LHC. were reconstructed via their hadronic decay channels yields central (0–10%) semicentral (30–50%)...
The study of the strength and behaviour antikaon-nucleon ($\mathrm{\overline{K}N}$) interaction constitutes one key focuses strangeness sector in low-energy Quantum Chromodynamics (QCD). In this letter a unique high-precision measurement strong between kaons protons, close above kinematic threshold, is presented. femtoscopic measurements correlation function at low pair-frame relative momentum (K$^+$ p $\oplus$ K$^-$ $\overline{\mathrm{p}}$) (K$^-$ K$^+$ pairs measured pp collisions...
We report a precise measurement of the J/ψ elliptic flow in Pb-Pb collisions at sqrt[s_{NN}]=5.02 TeV with ALICE detector LHC. The mesons are reconstructed midrapidity (|y|<0.9) dielectron decay channel and forward rapidity (2.5<y<4.0) dimuon channel, both down to zero transverse momentum. At rapidity, v_{2} is studied as function momentum centrality. A positive observed range 2<p_{T}<8 GeV/c three centrality classes confirms higher statistics our earlier results sqrt[s_{NN}]=2.76...
The ALICE Collaboration reports the measurement of semi-inclusive distributions charged-particle jets recoiling from a high-transverse momentum trigger hadron in p-Pb collisions at $\sqrt{s_{\rm NN}} =5.02$ TeV. Jets are reconstructed tracks using anti-$k_{\rm T}$ algorithm with resolution parameter $R=0.2$ and $0.4$. A data-driven statistical approach is used to correct uncorrelated background jet yield. Recoil reported for transverse $15<p_{\rm T,jet}^{\rm ch} <50$ GeV/$c$ compared various...
The ALICE Collaboration has measured the energy dependence of exclusive photoproduction $$\mathrm {J}/\psi $$ vector mesons off proton targets in ultra–peripheral p–Pb collisions at a centre-of-mass per nucleon pair $$\sqrt{s_\mathrm{NN}} = 5.02$$ TeV. e $$^+$$ $$^-$$ and $$\mu ^+\mu ^-$$ decay channels are used to measure cross section as function rapidity range $$-2.5< y < 2.7$$ , corresponding an $$\gamma p interval $$40< W_{\gamma \mathrm {p}}<550$$ GeV. measurements, which consistent...
A measurement of the production prompt Λc+ baryons in Pb–Pb collisions at sNN=5.02 TeV with ALICE detector LHC is reported. The and Λ‾c− were reconstructed midrapidity (|y|<0.5) via hadronic decay channel Λc+→pKS0 (and charge conjugate) transverse momentum centrality intervals 6<pT<12 GeV/c 0–80%. Λc+/D0 ratio, which sensitive to charm quark hadronisation mechanisms medium, measured found be larger than ratio minimum-bias pp s=7 p–Pb TeV. In particular, values differ by about two standard...
The first measurement of the cross section for coherent J/$\psi$ photoproduction as a function $|t|$, square momentum transferred between incoming and outgoing target nucleus, is presented. data were measured with ALICE detector in ultra-peripheral Pb-Pb collisions at centre-of-mass energy per nucleon pair $\sqrt{s_{\rm NN}} = 5.02$ TeV produced central rapidity region $|y|<0.8$, which corresponds to small Bjorken-$x$ range $(0.3-1.4) \times 10^{-3}$. $|t|$-dependence not described by...
The first measurement of the ϒ(1S) elliptic flow coefficient (v_{2}) is performed at forward rapidity (2.5<y<4) in Pb-Pb collisions sqrt[s_{NN}]=5.02 TeV with ALICE detector LHC. results are obtained scalar product method and reported as a function transverse momentum (p_{T}) up to 15 GeV/c 5%-60% centrality interval. measured ϒ(1S)v_{2} consistent 0 small positive values predicted by transport models within uncertainties. v_{2} 2<p_{T}<15 lower than that inclusive J/ψ mesons same p_{T}...
The production of prompt $D^{0}$, $D^{+}_{\rm s}$, and $\Lambda_{\rm c}^{+}$ hadrons, their ratios, s}$/$D^{0}$ c}^{+}$/$D^{0}$, are measured in proton-proton collisions at $\sqrt{s}$ = 13 TeV midrapidity ($|y| <0.5$) with the ALICE detector LHC. measurements performed as a function charm-hadron transverse momentum ($p_{\rm T}$) intervals charged-particle multiplicity, two multiplicity estimators covering different pseudorapidity regions. While strange to non-strange ratio indicates no...
The p_{T}-differential cross sections of prompt charm-strange baryons Ξ_{c}^{0} and Ξ_{c}^{+} were measured at midrapidity (|y|<0.5) in proton-proton (pp) collisions a center-of-mass energy sqrt[s]=13 TeV with the ALICE detector LHC. baryon was reconstructed via both semileptonic decay (Ξ^{-}e^{+}ν_{e}) hadronic (Ξ^{-}π^{+}) channels. (Ξ^{-}π^{+}π^{+}) channel. branching-fraction ratio BR(Ξ_{c}^{0}→Ξ^{-}e^{+}ν_{e})/BR(Ξ_{c}^{0}→Ξ^{-}π^{+})=1.38±0.14(stat)±0.22(syst) total uncertainty reduced...
Abstract In our Galaxy, light antinuclei composed of antiprotons and antineutrons can be produced through high-energy cosmic-ray collisions with the interstellar medium or could also originate from annihilation dark-matter particles that have not yet been discovered. On Earth, only way to produce study high precision is create them at particle accelerators. Although properties elementary antiparticles studied in detail, knowledge interaction matter limited. We determine disappearance...
We present the charged-particle multiplicity distributions over a wide pseudorapidity range ( $$-\,3.4<\eta <5.0$$ ) for pp collisions at $$\sqrt{s}= 0.9, 7$$ , and 8 TeV LHC. Results are based on information from Silicon Pixel Detector Forward Multiplicity of ALICE, extending coverage earlier publications high-multiplicity reach. The measurements compared to results CMS experiment PYTHIA, PHOJET EPOS LHC event generators, as well IP-Glasma calculations.
This paper presents the test results of second prototype SAMPA, ASIC designed for upgrade read-out front end electronics ALICE Time Projection Chamber (TPC) and Muon (MCH). SAMPA is made in a 130 nm CMOS technology with 1.25 V nominal voltage supply provides 32 channels, selectable input polarity, three possible combinations shaping time sensitivity. Each channel consists Charge Sensitive Amplifier, semi-Gaussian shaper 10-bit ADC; Digital Signal Processor digital filtering compression...
Inclusive $\Upsilon$(1S) and $\Upsilon$(2S) production have been measured in Pb-Pb collisions at the centre-of-mass energy per nucleon-nucleon pair $\sqrt{s_{_{\rm NN}}}=5.02$ TeV, using ALICE detector CERN LHC. The $\Upsilon$ mesons are reconstructed rapidity interval $2.5<y<4$ transverse-momentum range $p_{\rm T}<15$ GeV/$c$, via their decays to muon pairs. In this Letter, we present results on inclusive nuclear modification factor $R_{\rm AA}$ as a function of collision centrality,...