M. Agnello
A5009284329- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Atomic and Molecular Physics
- Superconducting Materials and Applications
- Advanced Chemical Physics Studies
- Dark Matter and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Advanced NMR Techniques and Applications
- Muon and positron interactions and applications
- Quantum, superfluid, helium dynamics
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Mass Spectrometry Techniques and Applications
- Inorganic Fluorides and Related Compounds
- Neutrino Physics Research
- Scientific Research and Discoveries
- Cosmology and Gravitation Theories
- Radioactive Decay and Measurement Techniques
- Cold Atom Physics and Bose-Einstein Condensates
Polytechnic University of Turin
2016-2025
European Organization for Nuclear Research
2013-2023
Instituto Politécnico Nacional
1982-2021
Technical University of Munich
2021
Istituto Nazionale di Fisica Nucleare, Sezione di Torino
2009-2019
Istituto Nazionale di Fisica Nucleare
1991-2014
Indian Institute of Technology Bombay
2014
University of Bergen
2013-2014
Turin Polytechnic University
2009
High Energy Accelerator Research Organization
2009
Angular correlations between charged trigger and associated particles are measured by the ALICE detector in p–Pb collisions at a nucleon–nucleon centre-of-mass energy of 5.02 TeV for transverse momentum ranges within 0.5<pT,assoc<pT,trig<4GeV/c. The over two units pseudorapidity full azimuthal angle different intervals event multiplicity, expressed as yield per particle. Two long-range ridge-like structures, one on near side away side, observed when per-trigger obtained low-multiplicity...
In this paper measurements are presented of $\rm \pi$$^+$, \pi$$^-$, K$^+$, K$^-$, p and $\overline{\rm p}$ production at mid-rapidity < 0.5, in Pb-Pb collisions $\sqrt{s_{\rm NN}} = 2.76$ TeV as a function centrality. The measurement covers the transverse momentum ($p_{\rm T}$) range from 100, 200, 300 MeV/$c$ up to 3, 4.6 GeV/$c$, for $\rm\pi$, K, respectively. measured $p_{\rm T}$ distributions yields compared expectations based on hydrodynamic, thermal recombination models. spectral...
At sufficiently high temperature and energy density, nuclear matter undergoes a transition to phase in which quarks gluons are not confined: the Quark-Gluon Plasma (QGP) [1]. Such an extreme state of strongly-interacting QCD (Quantum Chromo-Dynamics) is produced laboratory with high-energy collisions heavy nuclei, where enhanced production strange hadrons observed [2-6]. Strangeness enhancement, originally proposed as signature QGP formation [7], more pronounced for multi-strange baryons....
This publication describes the methods used to measure centrality of inelastic Pb-Pb collisions at a center-of-mass energy 2.76 TeV per colliding nucleon pair with ALICE. The is key parameter in study properties QCD matter extreme temperature and density, because it directly related initial overlap region nuclei. Geometrical collision, such as number participating nucleons binary nucleon-nucleon collisions, are deduced from Glauber model sharp impact selection shown be consistent those...
In this Letter, comprehensive results on ${\rm\pi}^\pm$, K$^\pm$, K$^0_S$, p, $\rm\bar{p}$, $\rm \Lambda$ and \bar{\Lambda}$ production at mid-rapidity ($0 < y_{\rm cms} 0.5$) in p-Pb collisions $\sqrt{s_{\rm NN}} = 5.02$ TeV, measured by the ALICE detector LHC, are reported. The transverse momentum distributions exhibit a hardening as function of event multiplicity, which is stronger for heavier particles. This behavior similar to what has been observed pp Pb-Pb LHC. $p_{\rm T}$ compared...
We have searched for a deeply bound kaonic state by using the FINUDA spectrometer installed at e+e− collider DAΦNE. Almost monochromatic K−’s produced through decay of ϕ(1020) mesons are used to observe K− absorption reactions stopped on very thin nuclear targets. Taking this unique advantage, we succeeded detect kaon-bound K−pp its two-body into Λ hyperon and proton. The binding energy width determined from invariant-mass distribution as 115+6−5(stat)+3−4(syst) MeV 67+14−11(stat)+2−3(syst)...
ALICE is an LHC experiment devoted to the study of strongly interacting matter in proton-proton, proton-nucleus and nucleus-nucleus collisions at ultra-relativistic energies. The VZERO system, made two scintillator arrays asymmetric positions, one on each side interaction point, plays a central role ALICE. In addition its core function as trigger source, system used monitor beam conditions, reject beam-induced backgrounds measure basic physics quantities such luminosity, particle...
ALICE (A Large Ion Collider Experiment) is studying the physics of strongly interacting matter, and in particular properties Quark–Gluon Plasma (QGP), using proton–proton, proton–nucleus nucleus–nucleus collisions at CERN LHC (Large Hadron Collider). The Collaboration preparing a major upgrade experimental apparatus, planned for installation second long shutdown years 2018–2019. A key element construction new, ultra-light, high-resolution Inner Tracking System (ITS) based on monolithic CMOS...
The ALICE measurement of K(S)(0) and Λ production at midrapidity in Pb-Pb collisions √(s(NN))=2.76 TeV is presented. transverse momentum (p(T)) spectra are shown for several collision centrality intervals the p(T) range from 0.4 GeV/c (0.6 Λ) to 12 GeV/c. dependence Λ/K(S)(0) ratios exhibits maxima vicinity 3 GeV/c, positions shift towards higher with increasing centrality. magnitude these increases by almost a factor three between most peripheral central collisions. This baryon excess...
Angular correlations between unidentified charged trigger particles and various species of associated (unidentified particles, pions, kaons, protons antiprotons) are measured by the ALICE detector in p-Pb collisions at a nucleon-nucleon centre-of-mass energy 5.02 TeV transverse-momentum range $0.3 < p_{\rm T} 4$ GeV/$c$. The expressed as yield per particle obtained pseudorapidity $|\eta_{\rm lab}|<0.8$. Fourier coefficients extracted from long-range projected onto azimuthal angle difference...
The production of ${\rm\Xi}^-$ and ${\rm\Omega}^-$ baryons their anti-particles in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV has been measured using the ALICE detector. transverse momentum spectra mid-rapidity ($|y| < 0.5$) for charged $\rm\Xi$ $\rm\Omega$ hyperons have studied range $0.6 p_{\rm T} 8.0$ GeV/$c$ $1.2 7.0$ GeV/$c$, respectively, several centrality intervals (from most central 0-10% to peripheral 60-80% collisions). These compared with predictions recent hydrodynamic...
The ALICE Collaboration at the LHC has measured J/ψ and ψ′ photoproduction mid-rapidity in ultra-peripheral Pb–Pb collisions $\sqrt{s_{\mathrm{NN}}}=2.76~\mathrm{TeV}$ . charmonium is identified via its leptonic decay for events where hadronic activity required to be minimal. analysis based on an event sample corresponding integrated luminosity of about 23 μb−1. cross section coherent incoherent production rapidity interval −0.9<y<0.9, are...
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...
Transverse momentum spectra of $π^{\pm}$, $\rm K^{\pm}$ and p($\bar{\rm p}$) up to $p_{\rm T}$ = 20 GeV/$c$ at mid-rapidity in pp Pb-Pb collisions $\sqrt{s_{\rm NN}}=$ 2.76 TeV have been measured using the ALICE detector Large Hadron Collider. The proton-to-pion kaon-to-pion ratios both show a distinct peak T} \approx 3 GeV/c$ central collisions. Below peak, < GeV/$c$, are good agreement with hydrodynamical calculations, suggesting that itself is dominantly result radial flow rather than...
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...
The inclusive J/ψ nuclear modification factor (RAA) in Pb–Pb collisions at sNN=2.76TeV has been measured by ALICE as a function of centrality the e+e− decay channel mid-rapidity (|y|<0.8) and centrality, transverse momentum rapidity μ+μ− forward-rapidity (2.5<y<4). yields are suppressed compared to those pp scaled number binary collisions. RAA integrated over range corresponding 90% inelastic cross section is 0.72±0.06(stat.)±0.10(syst.) 0.58±0.01(stat.)±0.09(syst.) forward-rapidity. At low...
The ALICE Collaboration has made the first measurement at LHC of J/ψ photoproduction in ultra-peripheral Pb–Pb collisions sNN=2.76TeV. is identified via its dimuon decay forward rapidity region with muon spectrometer for events where hadronic activity required to be minimal. analysis based on an event sample corresponding integrated luminosity about 55 μb−1. cross section coherent production interval −3.6<y<−2.6 measured dσJ/ψcoh/dy=1.00±0.18(stat)−0.26+0.24(syst)mb. result compared...
The yields of the K*(892)$^{0}$ and $\Phi$(1020) resonances are measured in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV through their hadronic decays using ALICE detector. measurements performed multiple centrality intervals mid-rapidity (|$y$|<0.5) transverse-momentum ranges 0.3 < $p_{\rm T}$ 5 GeV/$c$ for 0.5 $\Phi$(1020). suppressed central with respect to pp peripheral (perhaps due rescattering its decay products medium), while longer lived meson is not suppressed. These particles...
The transverse momentum (${p}_{T}$) distribution of primary charged particles is measured in minimum bias (non-single-diffractive) $p+\mathrm{Pb}$ collisions at $\sqrt{{s}_{NN}}=5.02\text{ }\text{ }\mathrm{TeV}$ with the ALICE detector LHC. ${p}_{T}$ spectra near central rapidity range $0.5<{p}_{T}<20\text{ }\mathrm{GeV}/c$ exhibit a weak pseudorapidity dependence. nuclear modification factor ${R}_{p\mathrm{Pb}}$ consistent unity for above $2\text{ }\mathrm{GeV}/c$. This measurement...
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)....
Azimuthally anisotropic distributions of D$^0$, D$^+$ and D$^{*+}$ mesons were studied in the central rapidity region ($|y|<0.8$) Pb-Pb collisions at a centre-of-mass energy $\sqrt{s_{\rm NN}} = 2.76$ TeV per nucleon-nucleon collision, with ALICE detector LHC. The second Fourier coefficient $v_2$ (commonly denoted elliptic flow) was measured centrality class 30-50% as function D meson transverse momentum $p_{\rm T}$, range 2-16 GeV/$c$. is comparable magnitude to that light-flavour hadrons....
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,...
Measurements of multiparticle azimuthal correlations (cumulants) for charged particles in $p$-Pb at $\sqrt{{s}_{\mathrm{NN}}}=5.02$ TeV and Pb-Pb $\sqrt{{s}_{\mathrm{NN}}}=2.76$ collisions are presented. They help address the question whether there is evidence global, flowlike, system. Comparisons made to measurements from larger system, where such established. In particular, second harmonic two-particle cumulants found decrease with multiplicity, characteristic a dominance few-particle...
The production of (anti-)deuteron and (anti-)$^{3}\text{He}$ nuclei in Pb-Pb collisions at $\sqrt{{s}_{\mathrm{NN}}}=2.76$ TeV has been studied using the ALICE detector LHC. spectra exhibit a significant hardening with increasing centrality. Combined blast-wave fits several particles support interpretation that this behavior is caused by an increase radial flow. integrated particle yields are discussed context coalescence thermal-statistical model expectations. ratios, $^{3}\text{He}/d$...
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...